Photometric variability of Walf-Rayet type star HD 191765
Aytaj Iskandarova (ShAO)
18 October 2023
Nowadays, the application of photometers equipped with modern light receivers (CCD - Charge Coupled Device) in photometric observations and the use of more modern mathematical analysis methods in the processing of photometric CCD images of stars allow more accurate investigation of the physical processes taking place in stars. This allows us to build more accurate models of the physical processes taking place in stars. It is clear from this that even previously studied stars need to be re-examined with modern astronomical instruments.
Photometric observations of the star HD 191765 have been made before. However, observing this star with a modern CCD photometer is essential and relevant.
The photometric study of the star HD 191765 = WR 134, which Aytaj Iskandarova group studied, was carried out based on the processing and analysis of the images of this star obtained by the CCD photometer in the 60-cm telescope of the Shamakhy Astrophysical Observatory named after N.Tusi (ShAO). These studies are relevant from the point of view of understanding the nature of the physical processes taking place in the star HD 191765, building a physical model of this star, and understanding the properties of WR type stars in general, as well as massive close binary star systems.
Taking into account that the star HD 191765 under study is a close binary star system, its main photometric and spectral properties were interpreted, and the main evolutionary characteristics of close binary star systems were investigated. I will describe in detail the detected photometric variability of the star HD 191765, the results of the processing and analysis of its CCD images obtained at the 60-cm telescope of the ShAO.
Seminar took place on the Zoom platform and it could be viewed on screen in the Maa room, Tartu Observatory, Tõravere.