The metallicity range of variables in M 3

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The recently published spectroscopic metallicities of RR Lyrae stars in M 3 (Sandstrom et al. 2001) show a relatively wide range of the measured [Fe/H] values. As no dependence of the metallicities on either minimum temperature or period was found, they concluded that no real metallicity spread was detected. Comparing these spectroscopic metallicities with the [Fe/H] values calculated from the Fourier parameters of the light curves of the variables a correlation between the results of the two metallicity determinations emerges. As a consequence of the complete independence of the spectroscopic and photometric metallicities, this correlation points to a real metallicity spread in M 3. The absolute magnitudes of the variables follow a similar trend with both the spectroscopic and photometric metallicities as the general Mv - [Fe/H] relation predicts. This fact supports that the detected range in the metallicities of the variables is real.

Original languageEnglish
Pages (from-to)587-591
Number of pages5
JournalAstronomy and Astrophysics
Volume403
Issue number2
Publication statusPublished - May 2003

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metallicity
temperature
real variables
light curve
trends
trend
parameter
stars

Keywords

  • Globular clusters: individual: M 3
  • Stars: abundances
  • Stars: horizontal-branch
  • Stars: population II
  • Stars: variables: RR Lyr

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

The metallicity range of variables in M 3. / Jurcsik, J.

In: Astronomy and Astrophysics, Vol. 403, No. 2, 05.2003, p. 587-591.

Research output: Contribution to journalArticle

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