XMM-Newton observation of the X-ray point source population of the starburst galaxy IC342

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dc.creatorKong, Albert
dc.date2003-08-06
dc.date.accessioned2026-07-07T10:47:40Z
dc.date.available2026-07-07T10:47:40Z
dc.descriptionWe present the results of an XMM-Newton observation of the starburst galaxy IC342. Thirty-seven X-ray point sources were detected down to a luminosity limit of $\sim 10^{37}$ \lum. Most of the sources are located near the spiral arms. The X-ray point source luminosity function is consistent with a power-law shape with a slope of 0.55, typical of starburst galaxies. We also present the energy spectra of several ultraluminous X-ray sources (ULXs), including the luminous X-ray source in the galactic nucleus. Except for the nucleus and a luminous supersoft X-ray source, other ULXs can generally be fit with a simple power-law spectral model. The nucleus is very luminous ($\sim 10^{40}$\lum in 0.2-12 keV) and requires disc blackbody and power-law components to describe the X-ray emission. The spectral fit reveals a cool accretion disc (kT=0.11 keV) and suggests that the source harbours either an intermediate-mass black hole or a stellar-mass black hole with outflow.
dc.description8 pages, 7 figures, accepted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0308106
dc.identifierhttp://arxiv.org/abs/astro-ph/0308106
dc.identifierMon.Not.Roy.Astron.Soc.346:265,2003
dc.identifierdoi:10.1046/j.1365-2966.2003.07086.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183613
dc.subjectAstrophysics
dc.titleXMM-Newton observation of the X-ray point source population of the starburst galaxy IC342
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