Physical parameters of three field RR Lyrae stars
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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.
Ferro , A A , Pena , J H & Jaimes , R F 2013 , ' Physical parameters of three field RR Lyrae stars ' Revista mexicana de astronomia y astrofisica , vol. 49 , no. 1 , pp. 53-62 .
Revista mexicana de astronomia y astrofisica
© Copyright 2013: Instituto de Astronomía, Universidad Nacional Autónoma de México. All contents of this journal, except where noted, are licensed under a Creative Commons license: http://creativecommons.org/licenses/by-nc/3.0/
DescriptionThis work was partially supported by DGAPA–Universidad Nacional Autonoma de Mexico through project IN104612.
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