Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21722906g&link_type=abstract
American Astronomical Society, AAS Meeting #217, #229.06; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The determination of the stellar mass content of very high redshift galaxies is a crucial ingredient for the understanding of their evolution. By combining the new WFC3/IR data over the ERS with the deep IRAC observations from the GOODS program, we are able to estimate the masses of a large, newly acquired, sample of 400 high redshift (z > 4) sources. We recover the stellar Mass - Luv relation previously observed extending it to fainter limits. This relation appears to be constant from z 7 to z 4, indicating that galaxies with a given stellar mass have similar specific star formation rates at any given redshift z > 4. Because we determine individual masses we are also able to estimate the scatter in the M-Luv relation, finding it to be quite sizable, ˜ 0.5 dex. This relation in combination with the UV LFs has allowed us to construct completeness corrected stellar mass functions. Even though these MFs have a steep faint end, they seem to be shallower than found in some numerical simulations. The stellar mass densities derived from the MFs are in broad agreement with the values expected from the star formation rate density but important differences remain.
Bouwens Rychard
Gonzalez Valentino
Illingworth Garth
Labb'e Ivo
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