The HELLAS2XMM Survey. II. Multiwavelength Observations of P3: An X-Ray-bright, Optically Inactive Galaxy*
作者： A. Comastri , M. Mignoli , P. Ciliegi , P. Severgnini , R. Maiolino
DOI: 10.1086/340016
关键词:
摘要: Recent X-ray surveys have clearly demonstrated that a population of optically dull, X-ray–bright galaxies is emerging at 2–10 keV fluxes the order 10 � 14 ergs cm 2 s 1 . Although they might constitute an important fraction sources responsible for hard background, their nature still unknown. With aim better understanding physical mechanisms observed properties, we started extensive program multiwavelength follow-up observations X-ray, quiet discovered with XMM-Newton. Here report results what can be considered first example this class objects: CXOU J031238.9� 765134, originally by Chandra, and identified Fiore et al. (2000) apparently normal early-type galaxy z ¼ 0:159, usually known as FIORE P3. Analysis broadband energy distribution suggests presence heavily obscured active nucleus. Subject headings: galaxies: — individual (P3) nuclei X-rays:
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