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Title:
Surface Brightness Properties of z˜4-6 Galaxies in the HUDF
Authors:
Hathi, Nimish P.; Jansen, R. A.; Cohen, S. H.; Windhorst, R. A.; Malhotra, S.; Rhoads, J.
Affiliation:
AA(Arizona State Univ.), AB(Arizona State Univ.), AC(Arizona State Univ.), AD(Arizona State Univ.), AE(Arizona State Univ.), AF(Arizona State Univ.)
Publication:
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #171.02; Bulletin of the American Astronomical Society, Vol. 38, p.1145
Publication Date:
12/2006
Origin:
AAS
Bibliographic Code:
2006AAS...20917102H

Abstract

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.

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Physics
arXiv e-prints