Physical parameters of three field RR Lyrae stars

A. Arellano Ferro*, J. H. Pena, R. Figuera Jaimes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)53-62
Number of pages10
JournalRevista Mexicana de Astronomía y Astrofísica
Volume49
Issue number1
Publication statusPublished - Apr 2013

Keywords

  • Stars: variables: RR Lyrae
  • Techniques: photometry
  • Large-magellanic-cloud
  • SX phoenicis stars
  • TU ursae majoris
  • NGC 5024 M53
  • CCD photometry
  • Fourier decomposition
  • Nonradial pulsations
  • Frequency-analysis
  • Variable-stars
  • Distance-scale

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