VESPA: Recovering the Star Formation Histories of Galaxies

Details VESPA: Recovering the Star Formation Histories of Galaxies VESPA: Recovering the Star Formation Histories of Galaxies

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..379..346t&link_type=abstract

Cosmic Frontiers ASP Conference Series, Vol. 379, proceedings of the conference held 31 July-4 August 2006 at Durham University,

Physics

Scientific paper

We present VESPA (VErsatile SPectral Analysis): a method which aims to recover the metallicity and star formation history of galaxies, given their spectrum. We use the full spectral range to find a solution constructed from synthetic models. Instead of working on a fixed set of age and metallicity bins, our parameterization is dynamic, and the number and the location of the parameters we recover from each galaxy is dictated by its noise properties and spectrum shape. The method is fast (around 5 seconds per galaxy), and the preliminary results are very encouraging.

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