The Fraction of Heavily-Obscured AGN Amongst Diffuse-Merger ULIRGs

Details The Fraction of Heavily-Obscured AGN Amongst Diffuse-Merger ULIRGs The Fraction of Heavily-Obscured AGN Amongst Diffuse-Merger ULIRGs

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..118t&link_type=abstract

XMM-Newton Proposal ID #06729005

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Iras F11130-265, Iras 01569-2939, Iras 04074-2801, Iras 05020-2941

Scientific paper

As was recently established, the energy source in Ultraluminous Infrared Galaxies (ULIRGs) depends on their interaction phase. AGN have been found in the latest stages, while they are mostly not seen in the early merger phases. We propose to use XMM-Newton observations to constrain the fraction of recently-triggered AGN in the diffuse merger stage. We will look for a luminous hard (>3 keV) X-ray power-law (indicative of AGN activity not affected by obscuration) in a sample of 5 ULIRGs selected from the IRAS 1 Jy sample that do not show any AGN characteristic so far. These sources are excellent study cases for the black hole-galaxy evolution paradigm. These proposed snapshot observations will enable us to perform more extensive X-ray follow-up studies with Chandra and XMM.

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