2006/09/26 by Eleni Vardoulaki, E. Vardoulaki, Vardoulaki, Eleni +4
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0609719
2 pages, 2 figures, to be published by Crete University Press (conference proceedings of "Galaxy Evolution with Spitzer and Herschel", Crete, May 2006)
arxiv created 2006/09/26 · openalex publication_date 2006/09/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the 36 brightest radio sources in the Subaru/XMM-Newton Deep Field SXDF). Using MIPS 24 micron data from Spitzer we expect to trace accretion activity, even if it is hidden at optical wavelengths, unless the obscuring column is extreme. Our results suggest that in the decade or so below the break in the radio luminosity function that at least half, and potentially nearly all, radio sources are associated with accreting quasar-like objects. This is not true at lower radio luminosities where the quasar-like fraction approaches zero once compact sources are excluded.