Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models -- II. Adaptation to double-mode stars
arXiv:1109.6486 · doi:10.1111/j.1365-2966.2011.19920.x
Abstract
Our photometric-hydrodynamic method is generalized to determine fundamental parameters of multiperiodic radially pulsating stars. We report 302 UBV(RI)_C Johnson-Kron-Cousins observations of GSC 4868-0831. Using these and published photometric data of V372 Ser, their metallicity, reddening, distance, mass, radius, equilibrium luminosity, effective temperature are determined. The results underline the necessity of using multicolour photometry including an ultraviolet band to classify properly subgroups of RR Lyrae stars: our U observations could reveal that GSC 4868-0831 is a subgiant star pulsating in two radial modes, V372 Ser is a giant star with size and mass of an RRd star.
arXiv comment10 pages, 4 figures, 5 tables. Accepted for publication in Monthly Notices RAS
References in corpus (11)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- CU Comae: a new field double-mode RR Lyrae, the most metal poor discovered to date
- MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond
- Multiperiodic Galactic field RR Lyrae stars in the ASAS catalog
- Automated Nonlinear Stellar Pulsation Calculations: Applications to RR Lyrae stars. The Slope of the Fundamental Blue Edge and the First RRd Model Survey
- A Catalogue of RR Lyrae Stars from the Northern Sky Variability Survey
- Stellar Evolution and Variability in the Pre-ZAHB Phase
- Pulsational and evolutionary analysis of the double-mode RR Lyrae star BS Com
- Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models. I. Theory and practical implementation
- Distance and mass of pulsating stars from multicolour photometry and atmospheric models
- Five colour photometry of the RRd star V372 Ser