Observational and Theoretical Studies of 27 delta Scuti Stars with Investigation of the Period-Luminosity Relation
Künye
Poro, A., Paki, E., Mazhari, G., Sarabi, S., Kahraman Alicavus, F., Ahangarani Farahani, F., … Ghalee, A. (2021). Observational and Theoretical Studies of 27 δ Scuti Stars with Investigation of the Period–Luminosity Relation. Publications of the Astronomical Society of the Pacific, 133(1026), 084201. https://doi.org/10.1088/1538-3873/ac12dc Özet
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.
Unified Astronomy Thesaurus concepts: Delta Scuti variable stars (370); Photometry (1234)
Online material: rar file
