The Top Ten solar analogs in the ELODIE library

Details The Top Ten solar analogs in the ELODIE library The Top Ten solar analogs in the ELODIE library

2004-02-04

arxiv.org/abs/astro-ph/0402094v1

Astron.Astrophys. 418 (2004) 1089-1100

Astronomy and Astrophysics

Astrophysics

12 pages, accepted in A&A

Scientific paper

10.1051/0004-6361:20035708

Several solar analogs have been identified in the library of high resolution stellar spectra taken with the echelle spectrograph ELODIE. A purely differential method has been used, based on the chi2 comparison of a large number of G dwarf spectra to 8 spectra of the Sun, taken on the Moon and Ceres. HD 146233 keeps its status of closest ever solar twin (Porto de Mello & da Silva 1997). Some other spectroscopic analogs have never been studied before, while the two planet-host stars HD095128 and HD186427 are also part of the selection. The fundamental parameters found in the literature for these stars show a surprising dispersion, partly due to the uncertainties which affect them. We discuss the advantages and drawbacks of photometric and spectroscopic methods to search for solar analogs and conclude that they have to be used jointly to find real solar twins.

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