An Improved uvby-Metallicity Calibration for Metal-Rich Stars

Details An Improved uvby-Metallicity Calibration for Metal-Rich Stars An Improved uvby-Metallicity Calibration for Metal-Rich Stars

2002-07-01

arxiv.org/abs/astro-ph/0207054v1

Astrophys.J. 577 (2002) L45-L48

Astronomy and Astrophysics

Astrophysics

9 pages, 4 figures, accepted in ApJ Letters

Scientific paper

We present an improved uvby-metallicity relation calibrated for F, G, and early K dwarfs, and an analogous uvby-T(eff) relation, both derived using a Levenberg-Marquardt minimization scheme. Our calibrations are based on 1533 stars which appear in both the Cayrel de Strobel (2001) metallicity compilation, and in the Hauck-Mermilliod (1998) catalog of uvby photometry. We also examine the speculative possibility of using uvby photometry to produce a uvby-planeticity calibration. We conclude that while there is likely no strong photometric indicator of the presence or absence of short-period planets, the possibility of a spectroscopic indicator of planeticity is well worth examining.

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