Data: 25.02.2025

Weronika Narloch (CAMK,PL)

Cosmic measures: period-luminosity relations of pulsating stars in the Sloan bands

Streszczenie:
Since its discovery by Henrietta Swan Leavitt, the period-luminosity relation (also known as the Leavitt Law) for pulsating stars has been a useful tool for measuring cosmic distances. Over time, it has become a crucial rung of the so-called extragalactic distance ladder, important for measuring the famous Hubble constant, which can be interpreted as the rate of expansion of the universe. For this reason, period-luminosity relationships have become the object of interest for the Araucaria group. In this talk, I would like to present our recent efforts to calibrate these relations for different types of pulsating stars in our Galaxy, in the Sloan bands.