Morphologies of Millijansky Radio Source Hosts

Details Morphologies of Millijansky Radio Source Hosts Morphologies of Millijansky Radio Source Hosts

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.2213s&link_type=abstract

American Astronomical Society Meeting 207, #22.13; Bulletin of the American Astronomical Society, Vol. 37, p.1194

Astronomy and Astrophysics

Astronomy

Scientific paper

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-σ ), 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.

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