The Star Formation History of Galaxies Measured from Individual Pixels.I. The Hubble Deep Field North

Details The Star Formation History of Galaxies Measured from Individual Pixels.I. The Hubble Deep Field North The Star Formation History of Galaxies Measured from Individual Pixels.I. The Hubble Deep Field North

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19916009c&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #160.09; Bulletin of the American Astronomical Society, Vol. 34, p.571

Astronomy and Astrophysics

Astronomy

Scientific paper

We analyze the photometric information contained in individual pixels of galaxies in the Hubble Deep Field North using a new technique, pixel-z, that combines predictions of evolutionary synthesis models with photometric redshift template fitting. Each spectral energy distribution template is a result of modeling of the detailed physical processes affecting gas properties and star formation efficiency. The criteria chosen to generate the SED templates is that of sampling a wide range of physical characteristics such as age, star formation rate, extinction and metallicity. A key feature of our method is the sophisticated use of error analysis to generate error maps. These define the reliability of the template fitting on pixel scales and allow for the separation of the interplay among dust, metallicity and star formation. This technique offers a number of advantages over traditional integrated color studies. As a first application, we derive the star formation histories for physically distinct galactic sub-components of the galaxies in the HDF-N.

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