2021/02/28 by Atila Poro, Ehsan Paki, Golnaz Mazhari +11
Physics and Astronomy · #Absolute magnitude #Apparent magnitude #Astronomy and Astrophysical Research #Ephemeris #Light curve #Magnitude (astronomy) #Maxima #Overtone #Scientific Research and Discoveries #Stars #Stellar, planetary, and galactic studies #Variable star #astro-ph.SR
paper · pdf · doi:10.1088/1538-3873/ac12dc
5 Figures, 6 Tables, Accepted in the PASP journal
openalex created_date 2021/03/01 · arxiv created 2021/07/12 · openalex publication_date 2021/08/01 · arxiv updated 2021/09/08 · openalex updated_date 2026/08/05
The multi-color CCD photometric study of 27 δ Scuti stars is presented. By using approximately three years of photometric observations, we obtained the times of maxima and magnitude changes during the observation time interval for each star. The ephemerides of our δ Scuti stars were calculated based on the Markov Chain Monte Carlo (MCMC) method using the observed times of maxima and the period of the stars' oscillations. We used the Gaia EDR3 parallaxes to calculate the luminosities and also the absolute magnitudes of these δ Scuti stars. The fundamental physical parameters of all the stars in our sample such as masses and radii were estimated. We determined the pulsation modes of the stars based on the pulsation constants. Moreover, the period–luminosity ( P – L ) relation of δ Scuti stars was investigated and discussed. Then, by using a machine learning classification, new P – L relations for fundamental and overtone modes are presented.