Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6322y&link_type=abstract
American Astronomical Society Meeting 207, #63.22; Bulletin of the American Astronomical Society, Vol. 37, p.1250
Astronomy and Astrophysics
Astronomy
Scientific paper
The deep Infrared Array Camera (IRAC) observations of the Great Observatories Origins Deep Survey (GOODS) Spitzer Legacy Program have detected field Lyman-break galaxies at z 6. At this redshift regime, the IRAC observations measure the rest-frame optical fluxes from these galaxies, which are less prone to dust extinction and less sensitive to short-lived stars. In our earlier study of the high-z galaxies in the Hubble Ultra Deep Field, we have found that some very massive galaxies ( a few 1e10 solar mass) with ages of a few hundred million years were already in place by z 6. Here we report the most recent results from the study of the entire GOODS fields, HDF-N and CDF-S. In particular, using the GOODS Ultra-deep IRAC observations in the HDF-N, we are able to stringently constrain the mass upper limit of the z 6 galaxies that are not detected by the IRAC.
GOODS Team
Yan Hui
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