Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20917102h&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #171.02; Bulletin of the American Astronomical Society,
Mathematics
Logic
Scientific paper
The Hubble Ultra-Deep Field (HUDF) provides imaging deep enough that we can study surface brightness properties for a representative sample of high redshift galaxies at z=4-6. By separately coadding V, i' and z'-band HUDF images of sets of z˜4,5,6 objects, pre-selected to have nearly identical sizes and shapes, we are able to study the averaged radial structure of these objects at much higher signal-to-noise. We observe evolution of the radial surface brightness profiles with redshift, and place the observed differences within the context of galaxy formation scenarios.
Additionally, a comparison of the UV surface brightness from z=0-6 shows little evolution in the surface density of star-formation in star-forming galaxies. We use this as a Tolman test to confirm the cosmological surface brightness dimming expected under standard cosmological models.
This work was supported by HST grant GO 10530.
Cohen Seth H.
Hathi Nimish P.
Jansen Rolf A.
Malhotra Sagar
Rhoads James
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