Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342422z&link_type=abstract
American Astronomical Society, AAS Meeting #213, #424.22; Bulletin of the American Astronomical Society, Vol. 41, p.249
Astronomy and Astrophysics
Astronomy
Scientific paper
The star-formation histories and stellar mass assembly of faint galaxy populations at high redshift are important for our understanding of galaxy formation in the early Universe. In order to study the rest-frame optical light of galaxies at high redshift, we have obtained deep Spitzer/IRAC follow-up data on fields containing the most distant radio-loud objects known. Previous studies with HST have shown that these fields, centered on two radio galaxies at z=4 and z=5 and a radio-loud quasar at z=6, contain overdensities of faint galaxies likely to be associated with large-scale structure related to the radio sources. Due to the relative richness of the fields, we shed new light on the stellar mass distribution in some of the most highly biased regions known, and contrast with similar studies done in random fields. We also present evidence for strong differences in the stellar masses of radio sources, Lyman break galaxies and Lya emitting galaxies at z=4-6, and discuss the implications.
Overzier Roderik
Shu Xinwen
Zheng Wei
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