Star formation rate in the solar neighborhood

Details Star formation rate in the solar neighborhood Star formation rate in the solar neighborhood

2006-08-07

arxiv.org/abs/astro-ph/0608130v1

Astronomy and Astrophysics

Astrophysics

PhD thesis/Physics 2006, University of Pisa, 167 pages, complete pdf version is available at: http://etd.adm.unipi.it/theses

Scientific paper

This thesis develops a method for obtaining the star formation histories of a mixed, resolved population through the use of color-magnitude diagrams (CMDs). The method is applied to the derivation of the local star formation rate, modeling observations of the Hipparcos satellite wigth synthetic CMDs computed for different star formation histories with an updated stellar evolution library. Parallax and photometric uncertainties are included explicitly and corrected using the Bayesian Richardson-Lucy algorithm. We find that the solar neighborhood star formation rate has a characteristic timescale for variation of about 6 Gyr, with a maximum activity close to 3 Gyr ago. This suggests a global, rather than local, star forming event. The summary and conclusions are included here, the full thesis is available at the URL listed above.

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