Ultraluminous X-ray Sources in M51

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dc.creatorTerashima, Yuichi
dc.creatorWilson, Andrew S.
dc.date2002-04-18
dc.date.accessioned2026-07-07T02:03:27Z
dc.date.available2026-07-07T02:03:27Z
dc.descriptionWe present the results of Chandra observations of off-nuclear X-ray sources in the spiral galaxy M51 (NGC 5194). 113 X-ray sources have been detected in the field of view and 84 among them project within the disk of NGC 5194. Six and twenty eight sources have luminosities exceeding 1x10^39 ergs s^-1 and 1x10^38 ergs s^-1 in the 0.5-8 keV band, respectively. The number of luminous sources is much higher than normal spiral and elliptical galaxies and similar to galaxies experiencing starburst activity. X-ray spectra of most of the detected sources are consistent with a power law with a photon index between 1 and 2, while one source has an extremely hard spectrum and two sources have soft spectra. The spectra of three ultraluminous sources are consistent with both a power law and a multicolor disk blackbody (MCD) model, while a power law model is preferable to a MCD model in two objects. One luminous object which shows a remarkable spectrum, including emission lines, is also found and discussed.
dc.description4 pages, to appear in the Proceedings of the Symposium on ``New Visions of the Universe in the XMM-Newton and Chandra Era'', 26-30 November 2001, ESTEC, The Netherlands
dc.identifierhttps://arxiv.org/abs/astro-ph/0204321
dc.identifierhttp://arxiv.org/abs/astro-ph/0204321
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4387
dc.subjectAstrophysics
dc.titleUltraluminous X-ray Sources in M51
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