Observational and Theoretical Studies of 27 δ Scuti Stars with Investigation of the Period–Luminosity Relation
| Autor: | A. M. Zubareva, Ehsan Paki, Amir Ghalee, Filiz Kahraman Alicavus, Atila Poro, Mahshid Nourmohammad, Fatemeh Davoudi, A. A. Popov, Zahra Sabaghpour Arani, Golnaz Mazhari, Soroush Sarabi, Behjat Zarei Jalalabadi, Farzaneh Ahangarani Farahani, Hamidreza Guilani |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Luminosity Stars Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Observational study Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Period (music) |
| Zdroj: | Publications of the Astronomical Society of the Pacific. 133:084201 |
| ISSN: | 1538-3873 0004-6280 |
| DOI: | 10.1088/1538-3873/ac12dc |
| Popis: | The multi-color CCD photometric study of 27 Delta 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 Delta 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 Delta 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 Delta Scuti stars was investigated and discussed. Then, by using a machine learning classification, new P-L relations for fundamental and overtone modes are presented. Comment: 5 Figures, 6 Tables, Accepted in the PASP journal |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|