Thanks to a fortunate time-space configuration, signals about several interesting phenomena in our Galaxy reached Earth during 2022. In this post I will summarize the basic information about some of them.
First of all, novae that exploded in the period of 2020, 2021 were still active. Of them, I will mention two completely opposite objects. V1405 Cas is a very slow nova with multiple maxima and brightness variations. By the end of 2022, it was already in the nebular stage, but still brighter than 12 mag. And short-period variations with a characteristic time similar to the orbital period also appeared. However, there is no stable signal corresponding to the orbital period. In the world of cataclysmic variable stars, such behavior is usually called quasi-periodic oscillations. It will require a detailed periodic analysis. Fig. 1 shows the last few light curves.[Read more…] about Variable stars in 2022