The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5

Details The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5 The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...648..250c&link_type=abstract

The Astrophysical Journal, Volume 648, Issue 1, pp. 250-267.

Astronomy and Astrophysics

Astronomy

7

Galaxies: Evolution

Scientific paper

The Bright Ages Survey is a K-band-selected redshift survey over six separate fields with UBVRIzJHK imaging covering a total of 75.6 arcmin 2 and reaching K=20-20.5. Two fields have deep HST imaging, while all are centered on possible overdensities in the z~2 range. Here we report photometric redshifts and spectroscopy for this sample, which has been described in Paper I. We find 18 galaxies with spectroscopic redshifts of z>1.5. The derived rest-frame R-band luminosity functions show strong evolution out to z=2. The luminosity function at z=2 shows more bright galaxies than at any other epoch, even the extrapolated z=3 luminosity function from Shapley et al. However, the R-band integrated luminosity density remains roughly constant from to z=0.5 to z=2. Evolved galaxies (E, S0, Sa) show a decreasing contribution to the total R-band luminosity density with redshift. The dust extinction in our K-selected sample is moderately larger [median z=2 E(B-V)=0.30] than that found in Lyman break galaxies, although not enough to make a significant impact on the total light or star formation found at high redshift. We measure the extinction-corrected star formation rate density at z=2, finding ρSFR(z=1.5-2.5)=0.093 Msolar yr-1 Mpc-3, consistent with a relatively flat instantaneous star formation rate from z=1-4.
The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.

Affiliated with

Also associated with

No associations

Rating

The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-995359