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

S. Barcza, J. Benkő

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 publicationAIP Conference Proceedings
Pages250-252
Number of pages3
Volume1170
DOIs
Publication statusPublished - 2009
EventInternational Conference on Stellar Pulsation: Challenges for Theory and Observation - Santa Fe, NM, United States
Duration: May 31 2009Jun 5 2009

Other

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

Fingerprint

atmospheric models
photometry
stars
approximation
color
atmospheres
interstellar extinction
metallicity
gravitation
intervals
temperature

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Physical parameters of RR Lyrae stars from multicolor photometry and Kurucz atmospheric models. / Barcza, S.; Benkő, J.

AIP Conference Proceedings. Vol. 1170 2009. p. 250-252.

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

Barcza, S & Benkő, J 2009, Physical parameters of RR Lyrae stars from multicolor photometry and Kurucz atmospheric models. in AIP Conference Proceedings. vol. 1170, pp. 250-252, International Conference on Stellar Pulsation: Challenges for Theory and Observation, Santa Fe, NM, United States, 5/31/09. https://doi.org/10.1063/1.3246455
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