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Title:
The Unresolved Stellar Populations of Galaxies in the HUDF
Authors:
Ryan, Russell E., Jr.; Jansen, R. A.; Cohen, S. H.; Windhorst, R. A.
Affiliation:
AA(), AB(Arizona State Univ.), AC(Arizona State Univ.), AD(Arizona State Univ.), AE(Arizona State Univ.)
Publication:
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #171.03; Bulletin of the American Astronomical Society, Vol. 38, p.1145
Publication Date:
12/2006
Origin:
AAS
Bibliographic Code:
2006AAS...20917103R

Abstract

We present preliminary results of a pixel-by-pixel stellar population study of well-resolved, intermediate redshift (z 1) galaxies in the Hubble Ultra-Deep Field. We fit the publicly available HST images from ACS and NICMOS with stellar population synthesis models (Bruzual & Charlot 2003) at each pixel for galaxies with measured spectroscopic redshifts. This allows us to simultaneously estimate the stellar mass, star formation rate, age, and extinction from the best-fit model SED at each pixel. Given the NICMOS pixel size (0.09 "/pix) and the typical galaxy redshift (z 1), we estimate these parameters on sub-kiloparsec linear scales in each galaxy.

Support for this work was provided by NASA through grant number AR-10974.01A from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555.

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arXiv e-prints