Physical parameters of RR Lyrae stars from multicolor photometry and Kurucz atmospheric models

S. Barcza, J. M. Benkó

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The most comprehensive photometric material exists for RR Lyrae (RRL) stars in the Johnson-Cousins system UBV(RI)c. In this system the colors of the Kurucz atmospheric models are available allowing to determine the effective temperature and surface gravity as a function of phase. Using the UBV(RI) c photometry of the RRab star SU Dra as an example we determine the phase intervals where the quasi-static atmosphere approximation (QSAA) is valid, i.e. where the Kurucz atmospheric models do reproduce the observed UBV(RI) c colors sufficiently. From the phases where QSAA is a good approximation we determine metallicity and interstellar reddening of SU Dra.

Original languageEnglish
Title of host publicationStellar Pulsation
Subtitle of host publicationChallenges for Theory and Observation - Proceedings of the International Conference
Pages250-252
Number of pages3
DOIs
Publication statusPublished - Dec 1 2009
EventInternational Conference on Stellar Pulsation: Challenges for Theory and Observation - Santa Fe, NM, United States
Duration: May 31 2009Jun 5 2009

Publication series

NameAIP Conference Proceedings
Volume1170
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Stellar Pulsation: Challenges for Theory and Observation
CountryUnited States
CitySanta Fe, NM
Period5/31/096/5/09

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Keywords

  • Chemical composition
  • Colors
  • Effective temperature
  • Photometry
  • Rr lyrae stars

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Barcza, S., & Benkó, J. M. (2009). Physical parameters of RR Lyrae stars from multicolor photometry and Kurucz atmospheric models. In Stellar Pulsation: Challenges for Theory and Observation - Proceedings of the International Conference (pp. 250-252). (AIP Conference Proceedings; Vol. 1170). https://doi.org/10.1063/1.3246455