Hipparcos Results for Solar Analogs
Giusa Cayrel de Strobel
Observatoire de Paris, section de Meudon, DASGAL/URA335,
F-92195 Meudon, France
giusa.cayrel@obspm.fr
Eileen D. Friel
Department of Astronomy, Boston University, Boston, MA 02215 and
NSF, Division of Astronomical Sciences, Arlington, VA 22230
Abstract
The combination of precise distances, detailed spectroscopic analyses, and
internal structure calculations yields an evolutionary mass, a chemical
composition, and state of evolution, hence age, of an observed sample of 52
photometric solar analogs of unprecedented accuracy.
1. Introduction
In this contribution we will approach the new results for stars like the Sun
in three stages. First, we will review the reasons for the wide astronomical
interest in studying stars resembling the Sun. Second, we will summarize the
results of our spectroscopic search for solar analogs before the availability of
parallaxes from the astrometric satellite Hipparcos. Finally, we will
introduce the recent results from Hipparcos and show how they have affected our
understanding of the relative ranking of solar analogs.
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