AAS 207th Meeting, 8-12 January 2006
Session 22 Evolution of Galaxies, Galaxies Surveys I
Poster, Monday, 9:20am-7:00pm, January 9, 2006, Exhibit Hall

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[22.13] Morphologies of Millijansky Radio Source Hosts

B. Stalder, K.C. Chambers (Institute for Astronomy, Univ. of Hawaii)

We have begun a survey of 52 millijansky radio sources within the isoplanatic patch of bright guide stars suitable for AO correction. A large fraction of these should be at high redshift (z>1). Using a subsample of 17 of these objects imaged at high spatial resolution, we have found an indication of significant morphology evolution of the most massive galaxies between the observed and present epochs. Of the 17 radio sources, 4 are undetected (10-\sigma), 2 are unresolved point sources, and 1 is apparently a highly extinguished spiral. Detailed analysis of the remaining 10 objects shows that 8 have Sersic exponents less than 2.0, while only 2 are greater than 2.0. All of these 10 are symmetric systems, so one might conclude that the population is largely composed of disk systems, however the distribution of ellipticity is not what we would expect if that were the case.

The author(s) of this abstract have provided an email address for comments about the abstract: stalder@ifa.hawaii.edu

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