Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6207l&link_type=abstract
American Astronomical Society Meeting 207, #62.07; Bulletin of the American Astronomical Society, Vol. 37, p.1245
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the luminosity function (LF) of starburst galaxies with redshift z < 0.3, using a sample of 12,785 strongly star-forming (spectral type Sc or bluer) galaxies with robust photometric redshift measurements from the COSMOS two square degree survey. We use a modified maximum likelihood method to account for uncertainty in the photometric redshifts, and employ a bootstrapping technique to account for any systematic errors introduced. The LF is characterized by a Schechter function with a very steep faint end slope of α = -1.8 +/- 0.1 for the redshift bin 0.02 < z < 0.15 down to M(v) = -13, and for 0.15 < z < 0.30 down to M(v) = -15. We characterize the morphology distribution of faint starburst galaxies in this low redshift range, in terms of the fraction of compact (nucleated), irregular, and low surface-brightness galaxies respectively.
We gratefully acknowledge support from NASA via grant HST-GO-09822 to the City University of New York, and from the City University of New York CIRG grant program.
Cosmos Collaboration
Liu Charles T.
Paglione Timothy A. D.
Tribiano S.
Tyson Neil D.
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