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Accretion Disk Spectra of the Brightest Ultra-luminous X-ray Source in M82 | | Feng Yuan
; Ronald E. Taam R. Misra
; Xue-Bing Wu
; Yongquan Xue
; | | Date: |
30 Nov 2006 | | Abstract: | Emission 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 $9 imes 10^4 - 5 imes 10^5 msun$. 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. | | Source: | arXiv, astro-ph/0611939 | | Services: | Forum | Review | PDF | Favorites | |
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