Accretion Disk Spectra of the Brightest Ultra-luminous X-ray Source in M82

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dc.creatorYuan, Feng
dc.creatorMisra, Ronald E. Taam R.
dc.creatorWu, Xue-Bing
dc.creatorXue, Yongquan
dc.date2006-11-30
dc.date.accessioned2026-07-07T12:31:14Z
dc.date.available2026-07-07T12:31:14Z
dc.descriptionEmission spectra of hot accretion disks characteristic of advection dominated accretion flow (ADAF) models are investigated for comparison with the brightest ultra-luminous source, X-1, in the galaxy M82. If the spectral state of the source is similar to the low luminosity hard state of stellar mass black holes in our Galaxy, a fit to the {\it Chandra} X-ray spectrum and constraints from the radio and infrared upper limits, require a black hole mass in the range of $9 \times 10^4 - 5 \times 10^5 \msun$. Lower black hole masses ($\la 10^4 \msun$) are possible if M82 X-1 corresponds to the high luminosity hard state of Galactic black hole X-ray binary sources. Both of these spectrally degenerate hot accretion disk solutions lead to an intermediate mass black hole interpretation for M82 X-1. Since these solutions have different spectral variability with X-ray luminosity and predict different infrared emission, they can be distinguished by future off axis {\it Chandra} observations or simultaneous sensitive infrared detections.
dc.description17 pages, 2 figures; accepted by ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0611939
dc.identifierhttp://arxiv.org/abs/astro-ph/0611939
dc.identifierAstrophys.J.658:282-287,2007
dc.identifierdoi:10.1086/511301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216377
dc.subjectAstrophysics
dc.titleAccretion Disk Spectra of the Brightest Ultra-luminous X-ray Source in M82
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