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Astron. Astrophys. 356, 213-217 (2000)


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uvby Photometry of stars with planets

A. Giménez

1 Instituto de Astrof ísica de Andalucia, CSIC, Apartado 3.004, 18080 Granada, Spain
2 Laboratorio de Astrof ísica Espacial y Física Fundamental, INTA, Apartado 50.727, 28080 Madrid, Spain (ag@laeff.esa.es)

Received 23 December 1999 / Accepted 10 January 2000

Abstract

The use of Strömgren uvby photometry is proposed as a simple tool for the estimation of effective temperatures and metallicities in stars discovered to have planets. Previous photometric calibrations are tested with available spectroscopic measurements and their application to stars without high-resolution spectroscopy allowed the determination of metal abundances for 12 additional stars with planets. Their previously suggested relative metal-rich nature, when compared with similar field stars, is discussed as well as the possible relation of the stellar metal abundance with the mass of the planet.

Key words: stars: abundances – stars: fundamental parameters – stars: formation – stars: late-type


© European Southern Observatory (ESO) 2000

Online publication: March 28, 2000

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