Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110305m&link_type=abstract
American Astronomical Society, AAS Meeting #211, #103.05; Bulletin of the American Astronomical Society, Vol. 39, p.920
Astronomy and Astrophysics
Astrophysics
Scientific paper
We are obtaining high resolution (R 60,000), high signal-to-noise (S/N>150) spectra of a large sample of solar analogs at McDonald Observatory. The data will be used to determine very precise stellar parameters of the sample stars using differential and model atmosphere analysis, as well as look for solar twins, stars that are spectroscopically indistinguishable from the Sun. Solar twins and analogs are crucial for accurate stellar astrophysics, given that they constitute an ideal sample of calibrators for photometric and spectroscopic studies. Moreover, the study of solar twins may also help answer more fundamental questions such as: Is the Sun unique? Is a Sun required for life to come into existence? Do the properties and evolution of the Sun favor the emergence of intelligent life? The sample selection and preliminary results of the survey will be presented. In particular, we will discuss the discovery of the best ever solar twin known to date in an early stage of our work.
Melendez Jorge L.
Ramirez Ignacio
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