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An intermediate-mass black hole of over 500 solar masses in the galaxy ESO243-49
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An intermediate-mass black hole of over 500 solar masses in the galaxy ESO243-49
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Journal Article
An intermediate-mass black hole of over 500 solar masses in the galaxy ESO243-49
2009
Overview
Ultraluminous X-ray sources are extragalactic objects located outside the nucleus of the host galaxy with bolometric luminosities exceeding 10 super(39)ergs super(-1). These extreme luminosities-if the emission is isotropic and below the theoretical (Eddington) limit, where the radiation pressure is balanced by the gravitational pressure-imply the presence of an accreting black hole with a mass of 610 super(2)-10 super(5) solar masses (). The existence of such intermediate-mass black holes is in dispute, and though many candidates have been proposed, none are widely accepted as definitive. Here we report the detection of a variable X-ray source with a maximum 0.2-10keV luminosity of up to 1.110 super(42)e rgs super(-1) in the edge-on spiral galaxy ESO243-49, with an implied conservative lower limit for the mass of the black hole of 6500.
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