Astrophysicist explains big GRAVITATIONAL WAVE discovery! Are they NEW PHYSICS or merging SMBHs?

Рет қаралды 621,298

Күн бұрын

The BIG news in physics is that a new type of gravitational wave has been detected using pulsar timing arrays. In this video we’re chatting about what a pulsar timing array actually is, what’s been found, and why the gravitational waves might be from pairs of supermassive black holes orbiting each other, but there’s evidence that they could be from new physics processes occurring in the early Universe…
NanoGrav research papers - nanograv.org/news/15yrRelease
EPTA & InPTA research papers - www.epta.eu.org/epta-dr2.html
Parkes PTA research papers - www.atnf.csiro.au/research/pu...
Chinese PTA research papers - iopscience.iop.org/article/10...
00:00 - Introduction
01:48 - What is a pulsar timing array?
04:47 - How are these gravitational waves different to the ones detected by LIGO?
06:33 - What are the pulsar timing arrays looking for?
09:37 - What does the data look like?
13:11 - Are these gravitational waves from pairs of supermassive black holes?
16:02 - OR Is there evidence for NEW PHYSICS?
21:34 - What's next then?
23:29 - Bloopers
Video filmed on a Sony ⍺7 IV
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👩🏽‍💻 I'm Dr. Becky Smethurst, an astrophysicist at the University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars.
drbecky.uk.com
rebeccasmethurst.co.uk

Пікірлер: 2 100

@1dgram 11 ай бұрын

I'd love to see a Final Parsec Problem video. I guess the time it would take for the pair to lose enough rotational momentum to merge is longer than the age of the universe.

@rastaranger 11 ай бұрын

Seconded

@reeboothemad5514 11 ай бұрын

Yes, I would very much appreciate a video about that - I've never heard of that problem before and now I NEED to know more. 😅

@annmoore6678 11 ай бұрын

Yes, please give us a video about the Final Parsec Problem, so we can imagine what might happen if....

@Andy-Sas 11 ай бұрын

Finale parsec video please

@milferdjones2573 11 ай бұрын

It a big problem because it evidence shows they do merge based on most binary Supermassive black holes are rare.

@GeoffHellings 11 ай бұрын

Thank you for covering this. It was my dad's life long work to detect gravitation waves. Sadly he passed before seeing this but I am very proud of his contribution.

@balaji-kartha 11 ай бұрын

Every new discovery, everything new we learn in science is by standing on the shoulders of others (like your dad) who came before us. We are fortunate to be alive at this moment in time and there will be others who will come after us who will discover other things based on what we do today.

@ulrichkliegis4138 11 ай бұрын

I guess and hope Becky will read your remark, and that it will move something in her that you watch and react to her mentioning your father. You can be proud of that father! :)

@graceroma2723 11 ай бұрын

He did live long enough to see the data from LIGO though. I also know he has a formula named after him and he worked for 25 years at JPL. It must have been great growing up with him as your dad. Do you or your brother or sister do work in this field?

@graceroma2723 11 ай бұрын

@@jennyanydots2389 Is there anything named after any of you? I’m guessing yes.

@yourmommashouse 11 ай бұрын

HELLINGS AND DOWNS FORMULA

@Gregarious747 11 ай бұрын

Between JWST and this, it seems like we’re in this new age of discovery. It’s all just so exciting! Thanks so much for all the hard work you put in to making them understandable. I would really love to see a video on the Final Parsec Problem. That sounds super interesting!

@DrBecky 11 ай бұрын

Thanks 🤗

@reasonerenlightened2456 11 ай бұрын

@@DrBecky what is the use if t? Could we surf the waves with a gravitational surf-board?? What device can repel gravitational waves?

@tuboc3560 10 ай бұрын

@@reasonerenlightened2456it’s tangible proof that space can be distorted to shorten the distance between two points, ie using gravity for faster travel

@OrafuDa 10 ай бұрын

@@tuboc3560except that the “using” part is not really within our reach. We now appear to have proof that it happens out there, yes. But we cannot just let two SMBH collide at will, and it also wouldn’t make interstellar travel time significantly shorter.

@la7era1u54 10 ай бұрын

New discoveries...but only if adds to the current paradigm. Scientific egos can't handle being wrong about the fundamentals that the system is built upon. They will be dismissed outright before any evidence has even a chance to be ignored

@jeremyloscheider833 11 ай бұрын

Yes, please tell us about the Final Parsec problem. I'm really digging that you're walking us through this paper with illustrations and explanations ... and Elsa.

@cioccorita 11 ай бұрын

...and the Minions!

@john.ellmaker 11 ай бұрын

“I’m an astrophysicist, I’m a three sigma gal,” love that. I find myself waiting for the Dr. Becky take on all things astrophysics these days, brilliant as always.

@italianmiltyfriedman6264 11 ай бұрын

what

@bimmjim 11 ай бұрын

Becky is the best explainer.

@voidstarq 11 ай бұрын

I can't help imagining the kind of street-gang fight that must ensue whenever there's a four sigma signal in something that's relevant both to a three sigma sub-field and a five sigma one.

@preciousroy6079 11 ай бұрын

Honestly "I'm a 3-sigma gal" is a perfect candidate for the next t-shirt design.

@vigilantcosmicpenguin8721 10 ай бұрын

@@voidstarq Scientists are serious about this sort of stuff. Mathematicians have issued declarations of war against engineers for excessively rounding constants.

@firefalcon124epic 11 ай бұрын

Also, yes please on a "final parsec problem" video, sounds interesting.

@theanyktos 11 ай бұрын

I super appreciate you doing all the work of getting through all the papers so we don't have to. Anytime there's any news in the world of astronomy, you're the first person I turn to, to explain what's going on and what it means.

@DrBecky 11 ай бұрын

Thanks 🤗 that means a lot

@BanditUshanka 11 ай бұрын

First time viewer here, cheers on good content. Im impressed that you are able to crunch down information and present it in a way that is more easily digested by those that are not in the field. I know I find it a struggle when friends or family ask about certain topics and many colleagues do as well to the point we do not generally have an open discussion unless the person is familiar with certain things. If more could produce content like this, I feel like more people would take the dive into such fields of study as opposed to being intimidated by them.

@amberwalsh5767 10 ай бұрын

She is fantastic that way

@Tsudico 11 ай бұрын

Final Parsec Problem - I'd love to hear more about this. Has Hawking radiation been considered as a possible explanation? I would think that radiation from one black hole would intercept the path of the other black hole radiation between the two masses.

@evangonzalez2245 11 ай бұрын

My initial intuition is that the dark matter halos would interfere with their smooth orbits around each other

@ceoanw 11 ай бұрын

I was thinking along the same lines. I don't think we can detect Hawking radiation directly, but if some of the BH's momentum is bled off into Hawking radiation, it would be a way to measure said radiation by the behavior of the BHs during the "Final Parsec" phase.

@davidhand9721 11 ай бұрын

Nah, the scale is way off. For large black holes, Hawking radiation is negligible. It's like a hundred orders of magnitude too small to have a significant effect.

@JohnGalt0902 11 ай бұрын

And would enjoy having a parody of The Final Countdown as an opening

@Tsudico 11 ай бұрын

@@davidhand9721 It doesn't have to have a huge effect, just enough to tip the balance away from stable and toward a decaying orbit.

@duncanny5848 11 ай бұрын

I think an explanation of the Final Parsec Problem would be interesting, yes. look forward to it! Good info here, thanks

@AnExPor 11 ай бұрын

Yep, please make that video.

@benjaminshropshire2900 11 ай бұрын

Beyond the "why they stop inspiraling" (which sounds interesting on it's own), I'd like to see something about what the *problem* is. Do we have evidence that they do merge on a much faster timescale than we can account for? (E.g. "we see post merger galaxies that should still have two SMBH, but seem to only have one.")

@Keith_Butcher 11 ай бұрын

This is a perfect example of how to structure a video to explain complex technical information and make it accessible. Retained all the excitement, draws you into their world of expertise. Never talks down to you but helps you through the hard bits.

@El89Sol 11 ай бұрын

I love your videos, and absolutely would love to hear about the Final Parsec Problem! Can’t wait to see your next video!

@melodyecho4156 11 ай бұрын

I'm proud I was able to understand what SMBH meant in the title. It ain't much, but it's better than I could do a few years ago

@devanairemccallister4194 11 ай бұрын

KEEP THAT ATTITUDE UP

@bbbb98765 11 ай бұрын

* nods respectfully *

@8fledermaus8 11 ай бұрын

Shaking my bald head 🙃

@genghisgalahad8465 11 ай бұрын

@@8fledermaus8so much bald head?

@8fledermaus8 11 ай бұрын

Seriously tho, that's great - thumbs up!!

@neoanderson7 11 ай бұрын

I'm always super impressed how you're able to digest all this information and be able to explain it to the masses. I appreciate it! :-)

@johannageisel5390 11 ай бұрын

Well, black holes are her specialty, so she is probably already familiar with a lot of the methods and the math used.

@user-io8bm6gz5z 11 ай бұрын

settle down, simp

@Chris-iv3bc 11 ай бұрын

this is not information. This is fairy tales. I think Jesus is more plausible than these tarded theories. Welcome to the church of fairy tale land

@txmike1945 11 ай бұрын

@@johannageisel5390 Some "experts" are not very good at explaining. She is good at it and that was the point of the post.

@MisterTee2010 11 ай бұрын

That's why she's an astrophysicist and we are not.

@zriraum 11 ай бұрын

Hey doc! Appreciate the effort going into the videos. Thanks for going through all this new stuff so quickly just so you could make a video for us space enthusiasts.❤

@Hi5Y5 11 ай бұрын

This is my first video of yours that I have watched. LOVE your description and visual on explaining what a Pulsar is! This entire video is great, look forward to watching more.

@rangerg7278 11 ай бұрын

Nicely done. I am a science teacher for middle school and occasionally honors level high school, and I appreciate the way you make a lot of information more digestible. Plus, I have been into cosmology since fifteen years old, just for fun, and we have learned a few things since 1975. Thank you!

@DrBecky 11 ай бұрын

You’re very welcome 🤗

@reasonerenlightened2456 11 ай бұрын

@@DrBecky All that is needed is a gravitational waves transmitter directed towards a pulsar and human DNA can be sent out into the universe. ...or my playlist of favourite music.

@tahaceza 10 ай бұрын

@@DrBeckywhat is space time miss ?

@zenlizard1850 11 ай бұрын

It's always fun to watch Dr Becky geek out, and she's carrying it off well in this one.

@primus4cameron 11 ай бұрын

I don't think she needs to "carry it off". After all it's her default, is it not. For me it's always fun to watch Dr Becky bimbo out with pop references etc. It makes us feel more comfortable - that she can be as silly as we are. But trust me. It's just an act ...that she carries off quite well.

@DNTMEE 11 ай бұрын

@@jennyanydots2389 Actually it would be sexist and not racist. Come to think about it, I suppose it could be either. Bimbo could be a reference to a black dog cartoon character from Betty Boop, or a reference to a pretty but dumb woman. Is there another one?

@DNTMEE 11 ай бұрын

@@jennyanydots2389 Growler?

@DNTMEE 11 ай бұрын

@@jennyanydots2389 Fine. Believe as you wish. I'm not going to waste any time trying to convince your otherwise on such an utterly trivial point.

@truthtellah5929 11 ай бұрын

Thank you so much for this lovely video, Dr. Becky! I've done my best in attempting to make the recent PTA news digestible for others so they can better understand the science involved, but you truly are such a professional at it. Your efforts to be both exceptionally thorough and easily understandable are a boon for so many, and I look forward to sharing your video. Cheers to potential new physics, new research, and the possibility of better understanding our universe's first moments! 💜

@privatename3621 10 ай бұрын

Great presentation! It's amazing how well you break down such incredibly complex topics and intersperse animations and video to explain it in layman's terms that anyone can easily understand.

@Backsplash67 11 ай бұрын

Terrific explanation. Super clear. So grateful to have this. Congratulations to all the people who contributed around the world.

@thehappypittie 11 ай бұрын

I would absolutely love a video on the final parsec problem please! I love your breakdowns

@anysailer 11 ай бұрын

I've watched this twice and will probably watch it again. You explain these complex topics so beautifully and with such enthusiasm, one cannot help but get excited. I am a chemist and I only have a very basic understanding of astrophysics, but I have learnt so much since subscribing. I believe that your channel should be recommended viewing for any student of astrophysics. Thank you so much and keep up the excellent work.

@Ro32da72 10 ай бұрын

Love your excited, yet intensely knowlegable delivery - makes for such a great watch. You have a unique way of taking the insanely complex and boiling it down into a fascinating explaination. Hats off to you for crediting the authors of the papers you quote, there are actual people behind the science and it's great that you recognise that.

@PhaseBurned 11 ай бұрын

I'd love to see you produce a video about the final parsec problem! I've heard about it before but never really understood the factors that lead to why. Bet you'd do an amazing job explaining it so that it's accessible to the curious!

@kuenmao 11 ай бұрын

Thanks for acknowledging and explaining the 3-sigma vs 5-sigma issue. When I heard "one in a thousand" on the livestream, it did stick out to me as different from some other high profile announcements, like when the LHC announced their detection of the Higgs. Now I understand that it's different between Astrophysics and HEP. Have heard about the final parsec problem and understand the concept as a layman, but would appreciate a video with more in-depth insights.

@OmateYayami 11 ай бұрын

Yea, a simplified reason although a good enough is that it's way easier to find electrons, cosmic rays even muons than sky-objects with relevant properties to create your data sample to analyse and derive serious statistics. Maybe neutrinos are on par, but still it gonna be easier to find and create those than new galaxies or stars.

@DrBecky 11 ай бұрын

Glad it was helpful!

@andrewwmitchell 11 ай бұрын

Great video, just the perfect amount of detail and really understandable explanations. ❤ Yes, please to the Final Parsec Problem video. I've not heard of that before and it seems counterintuitive that the supermassive black holes wouldn't be following the same process as stellar mass black holes.

@stephensorrell4550 11 ай бұрын

Yes! Final parsec problem video please. Thank you Dr. Becky for all your work producing this content.

@Psycho-Ben 11 ай бұрын

👏Excellent explainer video on Pulsar Timing Arrays being used to detect gravitational waves! 👍13:43 YES, I'd be VERY interested in watching an explainer video on The Last Parsec Problem with supermassive black holes merging🤓

@mhoppy6639 11 ай бұрын

Just popped into this channel from a algorithm suggestion and I’m really glad. Smashing video, always been interested in astrophysics even though I don’t understand most of it ! Very accessible and enjoyable. Have a sub🎉

@alainpean1119 10 ай бұрын

I love how you make clear difficult concepts with a olt of illustrations nd animations. There is a big work behind your video to gather all these illustrations and animations. Thanks for the work, and to bring all these new big discoveries to the public.

@bryandraughn9830 11 ай бұрын

Dr. Becky is an example of the scientist who not only searches for knowledge about the universe, she also communicates directly to the public about work that other scientists are doing. She doesn't have to, but it's important to her that we understand their work so the younger generation can aspire to follow in their footsteps and continue the tradition. This is an extremely important function of the scientific community for pushing back against those who are promoting so much ignorance to young, curious minds. Thank you Dr. Becky! I wonder if the new data could be associated with the primordial blackhole formation models?😮

@Raydensheraj 11 ай бұрын

A lot of scientists write books in order to communicate science to the general public. The video format is rather a fast overview....I'm glad a lot of universities release free lectures and other presentations that are detailed...I follow more evolutionary theory and paleontology...no time for cosmology and astrophysics - but all scientific fields are interconnected, so I try to stay up to date concerning other fields....

@ammontreasure4626 11 ай бұрын

So exciting! Would love to see more information on the Final Parsec Problem too. Thanks for all you do, Becky!

@fawnmillercoaching6380 11 ай бұрын

This was BRILLIANT! YOU are brilliant! Thank you for dialing this down so eloquently and sharing with us! Subscribed!

@UteChewb 11 ай бұрын

Thank you for this excellent update. While you were describing the possibilities I automatically thought of Cosmic Strings, but Phase Transitions sounds so interesting. Wow. It must be so exciting to by an astrophysicist right now.

@Ardalambdion 11 ай бұрын

This is one of the episodes I have ached most after. Thank you for explaining the significance of gravitational waves and how to use different types of them for different purposes.

@Ardalambdion 11 ай бұрын

@@jennyanydots2389 Fortunately, Dr Becky understood what I meant and appreciated it.

@Ardalambdion 11 ай бұрын

@@jennyanydots2389 Your attacks on me have to stop with immediate and permanent effect. I have reported your account to youtube for harassment. Please make your life about other things than getting enemies at youtube and other places on- and offline. Dr Becky, may you suggest your followers and viewers to be polite?

@mitesh8utube 11 ай бұрын

Being an Indian and skeptic, I remain skeptical about any research coming from India, especially if it has potential to make headlines. It's not that people or researchers are fraud, but there's extreme pressure to make headlines from powers that be.

@I_Don_t_want_a_handle 11 ай бұрын

I doubt anywhere else is under less pressure, but for different reasons,maybe?

@arunps7719 11 ай бұрын

I agree such sensationism is prevalent in India, disgustingly so even. But the pure sciences community is better than that. Theoretical study under the radar for so long. Even ISRO is not talking about IPTA work even 😂 I think we can let this shine some light 😂

@georgesheffield1580 11 ай бұрын

Common to many politicians / narcissist

@michaelsommers2356 11 ай бұрын

Even if you get your alleged discovery into the news. other physicists won't let substandard work get by. They can be vicious. Just look at the reaction to the announcement of cold fusion.

@danieldalton1757 11 ай бұрын

Cool stuff. Thanks for the great summary and breakdown!

@memoi6308 11 ай бұрын

Fascinating content as always! Yes please, a video about the parsec problem

@ldipenti 11 ай бұрын

Thank you so much for these detailed videos! Your efforts are highly valued :)

@user-io8bm6gz5z 11 ай бұрын

settle down, simp

@BillMSmith 11 ай бұрын

I'm a bit in awe of your ability get so much information out, so clearly explained, in such a short time. I've seen a lot of explainers about this, yours is the only one that made sense. You seemed to anticipate the things that would trip people up. A resounding yes to the final parsec problem. I have a peripheral awareness of it, but it seems like something that might be intriguing. Thank you for the work you do, and the effort you put into them BTW, say hi to Editing Becky for me. Apparently she hasn't been called into action lately, but she is still remembered.

@user-io8bm6gz5z 11 ай бұрын

settle down, simp

@padders1068 10 ай бұрын

Becky! Quality content as ever, thanks for sharing and keep up the good work!

@pantheis 11 ай бұрын

Definitely final parsec problem video! And *thank you* for covering the gravitational wave background information. I kept seeing articles about it but none of them did a good job of explaining it the way you did. I was hoping you would cover it!

@MikeJamesMedia 11 ай бұрын

As others have said... As a non-physicist, I sincerely appreciate how you're able to help us understand these exciting new possibilities. Thank you! :)

@matthewh4550 11 ай бұрын

Just want to say thanks for your videos. You make it look easy but I'm sure you put an immense amount of effort into figuring out how to explain things so coherently and consistently well. I'll admit to being a bit 'meh' when this was announced based off the conventional press reports and given all the hype that preceded it but I fully understand the potential significance now. Thankyou so much again for the impressive and engaging body of work you're providing on KZfaq.

@user-io8bm6gz5z 11 ай бұрын

settle down, simp

@DrBecky 11 ай бұрын

You’re very welcome 🤗

@KieranLeCam 11 ай бұрын

Well done to the teams of these pulsar observatories for their hard work and dedication!

@PhilMason1972 11 ай бұрын

Ooooh Audiobook!!!! I’m in :) Thank you for all your work explaining this - I find it fascinating!!!

@kallekula84 11 ай бұрын

Very interesting stuff! It's great when no known theoretical framework can explain why something is happening and we're left to speculate on our own. It will be interesting to hear what all the great minds can come up with to explain the events we're seeing. Thank you for a great video Dr Smethurst!

@checcopadula5523 11 ай бұрын

Great video as always! I also think that a video on the final parsec problem would be amazing - it'd be cool as hell to learn more about it.

@R3v07v3R 11 ай бұрын

We Love your videos! Thank You for putting in the time for us. ☺

@butthardley5160 10 ай бұрын

I adore your channel. Thanks for breaking down big ideas and being a liaison for astro / gr-qc, what an exciting time to be in the field!

@sansmojo 11 ай бұрын

I can't get over how incredible all of this is. Thanks for another great video.

@littlelemming9688 11 ай бұрын

Awesome video! I was waiting to see what you had to say about these new findings, this is so exciting! Thanks for your hard work in keeping this information current and easy to understand as well. As a future aerospace engineer I salute you!

@MyHotRod79 11 ай бұрын

Love your video's! Have a wonderful Friday.😁

@1992corvette1 11 ай бұрын

I have always felt like I am constantly being stretched and pulled in many different directions, now I know why! Thanks for the clarification Dr. B! You Rock!

@dickytrope 10 ай бұрын

23:51 wonderful job. It’s so important to make this material accessible to the general public like me. The bloopers too are important. It makes the whole atmosphere even more engaging.

@richard-mtl 11 ай бұрын

WOW this is exciting! The next decade will be absolutely fascinating! Thank you so much for your continuing excellent work in making all of this understandable for everyone.

@4984christian 11 ай бұрын

Yes do the final parsec problem :D I love how you glow of excitement. Its inspiring :D

@astrorad2000 11 ай бұрын

Another wonderful video from you Dr. Becky. I love your sense of wonder that inspires folk like me to continue life long learning at age 74. Thank you.

@richardw2566 10 ай бұрын

Brilliant presentation. The amount of research you are doing for these video's is IMPRESSIVE. Thank you for the effort and the clear explanations of VERY complex subjects and data.

@marcelschannel8605 11 ай бұрын

Great as always... I waited a week for this one I second a video on the final parsec problem some day. I wonder, could all this say anything about about Penrose's conformal Weyl curvature model and his Hawking points? Like ruling them out?...:)

@das_it_mane 11 ай бұрын

I love the combination of enthusiasm mixed with first hand expertise and teaching ability (and personability). Wonderful videos.

@fwd79 11 ай бұрын

Great video as I've just come from a few **very** loud videos and this one felt like a calming ASMR video lol 😄 Keep up the good work 👍👍

@jaker721 11 ай бұрын

I’m glad you’re making content, fr

@hrperformance 11 ай бұрын

Yes please! A video on the final parsec problem would be great (when you have time) :)

@seanspartan2023 11 ай бұрын

This is an exciting time! Just like the discovery of the CMB led to theories of Inflation and the Inflaton field, who knows what new physics this will lead too. Hopefully one day we'll be able to observe what the universe was like at the beginning!

@SmilerAndSadEyes 10 ай бұрын

Love your videos, I always enjoy learning from them. Yes please to the Final Parsec Problem video.

@ianbd77 11 ай бұрын

You're so brilliant at explaining things, I really appreciate you.

@briandeschene8424 11 ай бұрын

We all deeply appreciate the time you invest in quickly digesting so much preliminary information (the hardest to parse) in order to provide us with as clear a data-based synopsis as possible of such current announcements in such a timely fashion.

@condorboss3339 11 ай бұрын

I was very much looking forward to your report on last week's gravitational wave announcement. As expected, your video was very informative. Thank you. Couldn't the apparent anisotropic pattern be due to the overall distribution of SMBH pairs being effectively random across the observable universe?

@MrMegaMetroid 11 ай бұрын

@@jennyanydots2389you off your meds?

@Highonwater3X 11 ай бұрын

@@jennyanydots2389 WTF?

@Highonwater3X 11 ай бұрын

@@jennyanydots2389 I don't know if this is some bit that I'm not understanding, you're trolling, or just a really weird person, but your first comment was extremely inappropriate and rude and I don't want to engage further.

@michaelzurfluh 10 ай бұрын

Would love to see a video about the final parsec problem. Thank you so much for everything you do. Love your channel!

@andrewsteinhaus8267 11 ай бұрын

Thanks for showing the plots and data details, So many other presenters feel like that is too much, but I think it helps form a much deeper understanding.

@annmoore6678 11 ай бұрын

Oh my gosh. You explained that so clearly that I, a humble language teacher and artist, could actually anticipate the next logical point you were going to make, at least at a few points in the presentation. When you got to the point about the team finding no evidence for the waves being anisotropic, I actually got chills! Thank you SO much for helping to make our universe a bit more understandable (or wait, maybe you made it more exciting and mysterious) to your loyal fans.

@LeeSmith-cf1vo 11 ай бұрын

I've been waiting for this video since the announcement 😊 If you do make the black hole merger video could you please include answers to the following: Presumably, at some point the event horizons of the 2 merging black holes would intersect? what would that look like? How does time dilation affect the merger?

@sallyforth9905 11 ай бұрын

I imagine our usual concept of the laws of physics pops out for lunch while that's happening.

@DKOILive 11 ай бұрын

Subscribed for the final parsec video to add motivation :)

@charlesbromberick4247 7 ай бұрын

Thanks for making a really complicated thing sort of understandable.

@agentdarkboote 11 ай бұрын

Thanks for covering this in such great detail! Will we one day be able to measure smaller strains with this technique, or higher frequency? Why does there seem to be a trade-off between high frequency and small strain? I'm curious if eventually we'll be able to measure black holes merging in the early universe, not just from the relatively small bubble of space around us.

@LionidasL10 11 ай бұрын

Excellent of you to not speak on Virgin Galactic. You don't want to wind up like Michio Kaku talking about hurricanes on the news. Thanks for all your great science communication. The public dialogue about the is makes it seem like its much more noise than correlation. I always thought of pulsar glitches as a result of things that are meta stable while spinning. There's a great vid from the ISS with a T shaped item spinning that illustrates what im talking about. This video makes it seem a lot more correlated than wishful thinking and P boosting.

@jtmann2002 11 ай бұрын

We need more people like Michio Kaku, not less

@LionidasL10 11 ай бұрын

@@jtmann2002 Michio just shows up and will say whatever wild shit he feels like. He's spent the last 2 decades becoming less and less credible anytime he appears. Yes, we need dreamers. Yes, we need good science communication. Michio isn't doing much of the last one and is doing a lot of bong cloud "futurism" dreaming. He ain't what he used to be.

@alexsavchovsky7282 11 ай бұрын

"The final parsec problem" sounds interesting and I would love to hear more about it, so - please do make a video on it when you get the chance! :)

@declanwk1 5 ай бұрын

thank you for all the hard work you put into the video, it's amazing you make such complicated science understandable and accessible

@eugenio1203 11 ай бұрын

Just to think that maths can unveil mysteries so far from our nature as slightly developed monkeys is unreal, it’s shocking, and you’re there in the threshold of knowledge! I take my hat off to you

@SlashHarkenUltra 11 ай бұрын

Humans aren't monkeys 😑

@eugenio1203 11 ай бұрын

@@SlashHarkenUltra i wanted to exaggerate my point, but all right then, slightly developed primates

@Ryan_gogaku 11 ай бұрын

This was a wonderful explanation of this topic for us laypeople. :) And the "Last Parsec Problem" sounds interesting. For this data release, though, I can't imagine how they dealt with all of the measurement issues. It seems like an almost insurmountable task to figure out exactly where the pulsars are and their velocities. I imagine having very low uncertainty on all of them would be hugely important, but I don't know how you'd do that.

@juliasophical 11 ай бұрын

I can't imagine that that much precision is required when measuring waves with wavelengths expressed in lightyears. At that scale, AU precision is not required, and the pulsars' velocities are effectively zero (akin to how we can just ignore continental drift when calculating trans-Atlantic flight times -- the distances are changing during flight, but not enough to matter on the long distance and short timescale involved).

@reasonitician 11 ай бұрын

I just love your excitement over this

@BlazenAsh1 9 ай бұрын

This is so cool! Lately I've been looking into Astrophysics, and might end up going into it at some point!

@greg.kasarik 11 ай бұрын

Wow! This is incredible. I can easily see a new Nobel Prize coming to these teams. As always, @DrBecky, I love your enthusiasm. Never stop doing you! 🙂

@originalhgc 11 ай бұрын

Are gravitational waves red-shifted (or the gravitational equivalent thereto) by the expansion of space-time, as with EM waves?

@astronome66 11 ай бұрын

Hey Dr B, yet another fantastic lesson on the mysteries of the universe. This one blew my mind again. Many thanks for making such complex science so accessible and comprehensible. Cheers!

@willmolina7395 10 ай бұрын

I just found you.. thanks YT.. This is the first video i see from you.. Loved it.. i just subscribed 😌 Keep them videos coming 🙏🏼

@luudest 11 ай бұрын

Question: Do you know how the clocks of the pulsar timing array are synchronised, and how accurate the time measurements need to be?

@marvintpandroid2213 11 ай бұрын

Firstly you watch a whole bunch of them, if the pulses change on one of them, IE it slows down and then back up again then you know some external something or other must be the reason for the change. You then look for those changes across the bunch of pulsars and you see them change in a pattern then you can model that change, and in this case the change is waves in the space between us and the bunch. The length of observations of the bunch ( years of monitoring ) allows you to measure them to a very high level of accuracy across the individuals, depending on the speed of the induvial it will be down to nanoseconds. Lots of computation of the statistics and modelling of those changes.

@luudest 11 ай бұрын

@@marvintpandroid2213 thx. Is the delay in change important? I.e. when you have different LIGOs and a delay in the GW signal you can determine the direction from the GW is coming from.

@marvintpandroid2213 11 ай бұрын

@@luudest In theory you could determine direction but the number of available pulsars, the wavelength of the waves and the fact that space is really really mindbogglingly big makes that really rather difficult. More work to do.

@brianawilk285 11 ай бұрын

@@marvintpandroid2213I would think with advanced AI/quantum computing they would be able find out exactly where and what caused the wave. Like if some type of warp is possible you would think using advanced computing would be able to detect these craft using an advanced version of this process.

@ogi22 11 ай бұрын

VERY accurate... They did it now just because they could precisely measure the location of Jupiter in the Solar system (thanks Juno!) and this allowed for neccesary corrections in the gravitational distortions, because Jupiter is so massive. That's why it all started at 2015 when Juno was closing to Jupiter allowing for those precise position data.

@diegovgn 11 ай бұрын

I’d love to see a video on the final parsec problem! Super curious how accreting mass over time doesn’t make black holes move closer and closer to the point where they merge

@boffo25 11 ай бұрын

You read all those papers. Amazing work. I love it so much!

@shaswatachowdhury9032 4 ай бұрын

Amazing Dr. Becky. It takes huge effort to make such enlightening videos. I am learning a lot from them. Please keep publishing such videos. I just completed my PhD in modified gravity and stellar astrophysics. I am now planning to diversify my interest into gravitational waves and pulsars. This video has given me a great deal of insight into PTA. Massive thanks!

@johnreford 11 ай бұрын

Over the next few decades as we gain ways of detecting gravitational waves at numerous frequencies, do you think we will be able to do a kind of gravitational wave spectroscopy? If so what kinds of questions do you think that would be useful for answering?

@luudest 11 ай бұрын

No time to watch the video. Have to write something desperatly first!

@williamchamberlain2263 11 ай бұрын

FTL in the comments section

@sophiejones3554 11 ай бұрын

Yes, I'd love to see a Final Parsec Problem video! That sounds really interesting! Thanks for your analysis, all these new physics ideas sound really interesting to explore.

@jaw147 11 ай бұрын

I love your amazing level of detail while still remaining accessible to general audiences, so do please elaborate on the "Final Parsec Problem" which sounds so emblematic of the "Last Mile" factor so prevalent in the commercial distribution of goods industries. It's telling that the "last minor fraction" of a problem can tell so much about the big picture of the whole distribution problem.