Insights Into Galaxy Evolution From Photometric Redshifts Across Many Fields

Details Insights Into Galaxy Evolution From Photometric Redshifts Across Many Fields Insights Into Galaxy Evolution From Photometric Redshifts Across Many Fields

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21721106k&link_type=abstract

American Astronomical Society, AAS Meeting #217, #211.06; Bulletin of the American Astronomical Society, Vol. 43, 2011

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I present results from a compiled sample spanning a range of public deep-fields, including the GOODS, COSMOS, UKIDSS-UDS and MUSYC fields. Photometric redshifts for these fields were obtained using a homogenous approach using the GAZELLE photo-z code; stellar masses and star formation rates have been estimated by comparison to GALEV evolutionary synthesis models, spanning a wide range of galaxy evolution scenarios.
The derived redshift distributions show generally good agreement with predictions from semi-analytical models, based on simulations of cosmological structure formation. Mass-functions of these fields reveal a population of very massive, yet actively star-forming galaxies, in numbers exceeding predictions of current semi-analytical models and hence hinting at an as yet insufficiently understood formation channel producing this kind of galaxy.

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