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 $i$$^2$ comparison of a large number of G dwarf spectra to 8 spectra of the Sun, taken on the Moon and Ceres. HD 146233 keeps its status of closest ever solar twin (Porto de Mello amp da Silva $cite$$PMDS97$$). Some other spectroscopic analogs have never been studied before, while the two planet-host stars HD 095128 and HD 186427 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. Based on observations made at the Observatoire de Haute-Provence (France).
|Number of pages||12|
|Journal||Astronomy and Astrophysics|
|Publication status||Published - 1 May 2004|
- stars: fundamental parameters, Sun: fundamental parameters