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Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models – II. Adaptation to double-mode stars
Article first published online: 24 NOV 2011
DOI: 10.1111/j.1365-2966.2011.19920.x
© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
Issue
Monthly Notices of the Royal Astronomical Society
Volume 419, Issue 4, pages 2774–2782, February 2012
Additional Information
How to Cite
Barcza, S. and Benkő, J. M. (2012), Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models – II. Adaptation to double-mode stars. Monthly Notices of the Royal Astronomical Society, 419: 2774–2782. doi: 10.1111/j.1365-2966.2011.19920.x
Publication History
- Issue published online: 9 JAN 2012
- Article first published online: 24 NOV 2011
- Accepted 2011 September 28. Received 2011 September 28; in original form 2011 June 23
- Abstract
- Article
- References
- Cited By
Keywords:
- hydrodynamics;
- stars: atmospheres;
- stars: fundamental parameters;
- stars: individual: GSC 4868–0831;
- stars: individual: V372 Ser;
- stars: variables: RR Lyrae
ABSTRACT
Our photometric–hydrodynamic method is generalized to determine the fundamental parameters of multiperiodic radially pulsating stars. We report 302 UBV(RI)C Johnson–Kron–Cousins observations of GSC 4868–0831. Using these and the published photometric data of V372 Ser, we determine the metallicity, reddening, distance, mass, radius, equilibrium luminosity and effective temperature. The results underline the necessity of using multicolour photometry, including an ultraviolet band, to classify the subgroups of RR Lyrae stars properly. Our U observations might reveal that GSC 4868–0831 is a subgiant star pulsating in two radial modes and that V372 Ser is a giant star with the size and mass of an RRd star.