Evolution of the stellar mass functions, mass densities and mass to light ratios at z>4 (Valentino Gonzalez, Univ. of California - Santa Cruz)
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| Qué |
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|---|---|
| Cuándo |
07/10/2010 de 04:30 pm a 05:30 pm |
| Dónde | DAA-PUC |
| Agregar evento al calendario |
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Abstract: Spitzer IRAC has recently given us access to the rest
frame optical light of Lyman Break Galaxies (LBGs) at 4<z<8,
allowing us to estimate the stellar mass content of these galaxies
through SED modeling. One of the key early results of such studies
was the existence of fairly massive galaxies (>10^{10}M\odot)
already by z\sim5. Using large samples of galaxies at z>4, it
has also been shown that, unexpectedly, their UV luminosity
correlates with their total stellar mass, providing new important
constraints to models of early galaxy evolution. In this
presentation I will review some of the latest advances in the
studies of very high redshift galaxies produced after the
installation of the WFC3 camera on HST. I will present our latest
determinations of the M-L_{UV} relation at z=4, 5, 6, and 7
(including its sizable scatter) and discuss its implications to
stellar mass growth. I will also show our most recent
determinations of the stellar mass functions and stellar mass
densities and compare the observed stellar mass growth with the
one expected from the integral of the star formation rate density
at these redshifts.
