Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21535002g&link_type=abstract
American Astronomical Society, AAS Meeting #215, #350.02; Bulletin of the American Astronomical Society, Vol. 42, p.532
Astronomy and Astrophysics
Astronomy
Scientific paper
The formation and early evolution of the first galaxies ever formed in the Universe represents one of the most interesting frontiers in astronomy. With the recent advent of the WFC3 camera onboard the HST our window of exploration has expanded beyond z˜7 but due to the faintness of the sources, access to their rest frame optical properties through complementary mid-IR observations is still limited to z<8. In our presentation we take advantage of an early selection of 11 bright z˜7 candidates - ACS z850 dropouts - found by Bouwens et al. (2009, in prep) over a large area of ˜80 arcmin2 of NICMOS data in and around the two GOODS fields. We complement our observations with the very deep 3.6 and 4.5 μm Spitzer IRAC imaging available through the GOODS program which gives us access to the rest frame optical properties of these galaxies. After removing the contaminating flux from the neighbors as described in Labbe et al (2006), most of these objects are detected in these mid-IR images which allows for the study of their stellar populations individually. Among our interesting findings, the comparison of the observed SEDs to synthetic stellar population models suggest a specific SFR of ˜2 Gyr-1 consistent with no evolution of this quantity between 4
Bouwens Rychard
Gonzalez Valentino
Illingworth Garth
Labb'e Ivo
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