Mathematics – Probability
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.5104h&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #51.04; Bulletin of the American Astronomical Society, Vol. 30, p.888
Mathematics
Probability
Scientific paper
An analysis of spectroscopic data on faint galaxies in an 8-arcmin diameter region centered on the Hubble Deep Field is presented. Source detection and photometry is performed in the U_n, G, cal R and K_s-band images to create catalogs complete to U_n=25, G=26, {cal R}=25.5 and K_s=20 mag. Keck Telescope spectroscopy exists for over 500 sources in the sample; the median redshift is 0.6. The rest-frame equivalent widths of the [O IIright ] 3727 Angstroms emission line are measured as a function of galaxy flux, color and redshift. The probability that a source of a given flux, color and redshift has its [O IIright ] line detected is estimated. [O IIright ] line luminosity functions and integrated [O IIright ] line luminosity densities are computed; they show strong evolution, implying a much higher star formation rate density at redshifts z ~ 1 than locally. The B-band luminosity function for the cal R-selected sample is computed using an estimate of the probability that a source is assigned a redshift given that it has been observed spectroscopically, based on the [O IIright ] detection probability. The luminosity function is flat (constant number per log luminosity) and consistent with local determinations except for a higher overall normalization. No evidence is found for dependence of the luminosity function on redshift or environment, but the blue galaxy luminosity function is more dwarf-rich than the red.
Blandford Roger
Cohen Judith Gamora
Hogg David Wardell
Pahre Michael A.
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