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arxiv: astro-ph/0202352 · v1 · submitted 2002-02-19 · 🌌 astro-ph

An XMM-Newton Survey of Ultra-Luminous Infrared Galaxies

V.Braito , A.Franceschini , R.Della Ceca , L.Bassani , M.Cappi , P.Malaguti , G.G.C.Palumbo , M.Persic
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G.Risaliti M.Salvati P.Severgnini
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classification 🌌 astro-ph
keywords irasgalaxiesinfraredstrongulirgsultra-luminousxmm-newtonallow
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We present preliminary results of XMM-Newton observations of 5 Ultra-luminous Infrared Galaxies (ULIRGs), part of a mini-survey program dedicated to 10 ULIRGs selected from the bright IRAS sample. For 3 of them (IRAS 20551-4250, IRAS 19254-7245 and Mkn 231) we find strong evidence for the presence of a hidden AGN, while for two others (IRAS 20110-4156 IRAS 22491-1808) the S/N ratio of the data does not allow us to be conclusive. In particular, we have detected a strong Fe-K line in the X-ray spectra of IRAS19254-7245, with an equivalent width (~2 keV) suggestive that most of the energy source in this object is due to a deeply buried AGN.

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