Computer Science
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1294..202i&link_type=abstract
THE FIRST STARS AND GALAXIES: CHALLENGES FOR THE NEXT DECADE. AIP Conference Proceedings, Volume 1294, pp. 202-207 (2010).
Computer Science
Star Formation, Clusters Of Galaxies, Brightness, Red Shift, Star Formation, Galaxy Clusters, Magnitudes And Colors, Luminosities, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies
Scientific paper
The recent extraordinarily deep WFC3/IR data from the HUDF09 program has dramatically expanded our insights to the galaxy population at z~7-9, and given us hints as to the population at z~10. In particular, as part of our program of identifying and characterizing the galaxy population at high redshift (z>6), we have been undertaking a thorough analysis of the luminosity functions to much lower luminosities than previous studies. We have used very deep fields (the HUDF, HUDF09 and the HUDF05 datasets), as well as extremely faint objects from highly-magnified sources from cluster lensing surveys, to derive the contribution from lower luminosity galaxies to as faint as 0.03-0.06 L* from z~7 to z~2. Recent results on the contribution of ULIRGS to star-forming galaxies indicate that in the first 1-2 Gyr the dominant contributors to the star formation rate density in the universe are the lower luminosity and lower mass objects that are fully represented in the Lyman Break population at z~4-7 and at earlier times. Evidence from the HST WFC3/IR and Spitzer IRAC data over the HUDF suggests that these z>7-8 galaxies include earlier populations that reach back to z>10. This period encompasses the reioinization epoch, and so the broad nature of the galaxy population is of particular interest. The new HST HUDF09 WFC3/IR data makes major contributions to numerous questions regarding the evolution of galaxies at early times.
Bouwens Rychard J.
Illingworth Garth D.
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