Physical parameters of three field RR Lyrae stars
Abstract
Stromgren uvby - beta photometry of the stars classified as RR Lyrae stars RU Piscium, SS Piscium and TU Ursae Majoris has been used to estimate their iron abundance, temperature, gravity and absolute magnitude. The stability of the pulsating period is discussed. The nature of SS Psc as a RRc or a HADS is addressed. The reddening of each star is estimated from the Stromgren colour indices and reddening sky maps. The results of three approaches to the determination of [Fe/H], T-eff and log(g) are discussed: Fourier light curve decomposition, the Preston Delta S index and the theoretical grids on the (b - y)(o) - c(10) plane.
Citation
Ferro , A A , Pena , J H & Jaimes , R F 2013 , ' Physical parameters of three field RR Lyrae stars ' , Revista Mexicana de Astronomía y Astrofísica , vol. 49 , no. 1 , pp. 53-62 .
Publication
Revista Mexicana de Astronomía y Astrofísica
Status
Peer reviewed
ISSN
0185-1101Type
Journal article
Description
This work was partially supported by DGAPA–Universidad Nacional Autonoma de Mexico through project IN104612.Collections
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