The X-Ray Properties of Ultraluminous Galaxies: Cosmological Implications

Computer Science

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Chandra Proposal Id #02600550

Scientific paper

Ultraluminous infrared galaxies (ULIRGs) are local laboratories to investigate the formation of elliptical galaxies and quasars, the enrichment and heating of the intergalactic medium (IGM), and the nature of optically-faint X-ray sources and high-z sub-mm sources. X-ray data are essential to address two major topics: 1) What is the impact of the mechanical energy supplied by the ULIRG on the ISM of its galaxy and the IGM? 2) What energetic role do dust-shrouded AGN play in ULIRGs? Previous X-ray observatories lacked the sensitivity and spectro-spatial resolution to settle these issues. The superb spatial resolution of the Chandra images will ideally complement our XMM-Newton spectra, and will create a well-observed sample of the eight nearest and brightest ULIRGs.

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