Artikel ; Online: Bright radio emission from an ultraluminous stellar-mass microquasar in M 31.
2013 Band 493, Heft 7431, Seite(n) 187–190
Abstract: A subset of ultraluminous X-ray sources (those with luminosities of less than 10(40) erg s(-1); ref. 1) are thought to be powered by the accretion of gas onto black holes with masses of ∼5-20M cicled dot, probably by means of an accretion disk. The X-ray ...
| Abstract | A subset of ultraluminous X-ray sources (those with luminosities of less than 10(40) erg s(-1); ref. 1) are thought to be powered by the accretion of gas onto black holes with masses of ∼5-20M cicled dot, probably by means of an accretion disk. The X-ray and radio emission are coupled in such Galactic sources; the radio emission originates in a relativistic jet thought to be launched from the innermost regions near the black hole, with the most powerful emission occurring when the rate of infalling matter approaches a theoretical maximum (the Eddington limit). Only four such maximal sources are known in the Milky Way, and the absorption of soft X-rays in the interstellar medium hinders the determination of the causal sequence of events that leads to the ejection of the jet. Here we report radio and X-ray observations of a bright new X-ray source in the nearby galaxy M 31, whose peak luminosity exceeded 10(39) erg s(-1). The radio luminosity is extremely high and shows variability on a timescale of tens of minutes, arguing that the source is highly compact and powered by accretion close to the Eddington limit onto a black hole of stellar mass. Continued radio and X-ray monitoring of such sources should reveal the causal relationship between the accretion flow and the powerful jet emission. |
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| Sprache | Englisch | |||||||||||||||
| Erscheinungsdatum | 2013-01-10 | |||||||||||||||
| Erscheinungsland | England | |||||||||||||||
| Dokumenttyp | Journal Article ; Research Support, Non-U.S. Gov't | |||||||||||||||
| ZDB-ID | 120714-3 | |||||||||||||||
| ISSN | 1476-4687 ; 0028-0836 | |||||||||||||||
| ISSN (online) | 1476-4687 | |||||||||||||||
| ISSN | 0028-0836 | |||||||||||||||
| DOI | 10.1038/nature11697 | |||||||||||||||
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| Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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