Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21531105k&link_type=abstract
American Astronomical Society, AAS Meeting #215, #311.05; Bulletin of the American Astronomical Society, Vol. 42, p.312
Mathematics
Logic
Scientific paper
I have constructed a publicly-available unified catalog of radio sources detected by GB6 (6cm), FIRST (20cm), NVSS (20cm), WENSS (92cm), and SDSS DR6 (optical). The catalog has over 2 million objects detected by FIRST and/or NVSS, and over 20,000 detected by all four radio surveys. The 20 cm radio fluxes are used to efficiently categorize sources into three classes of radio morphology. Radio color-magnitude-morphology distributions show a clear structure suggesting strong underlying physical correlations. Roughly one third of sources have an optical counterpart, and so can be classified as galaxy (resolved) or quasar (unresolved). Using a subset of approximately 20,000 sources detected at 92 and 20 cm, as well as optically, I am developing an AGN sample with well-understood distributions in redshift, size, luminosity, and spectral index for comparison with semi-analytic cosmological models as a test of underlying AGN physics and the Unification Paradigm. I will discuss other applications of the catalog including the search for rare radio objects and the study of radio quasars as a function of their radio morphology.
This material is based upon work supported by a National Science Foundation Graduate Research Fellowship and by NSF grant AST-0507259 to the University of Washington.
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