A periodicity of ∼1 hour in X-ray emission from the active galaxy RE J1034+396

Marek Gierliński (), Matthew Middleton, Martin Ward and Chris Done
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Marek Gierliński: University of Durham, South Road, Durham DH1 3LE, UK
Matthew Middleton: University of Durham, South Road, Durham DH1 3LE, UK
Martin Ward: University of Durham, South Road, Durham DH1 3LE, UK
Chris Done: University of Durham, South Road, Durham DH1 3LE, UK

Nature, 2008, vol. 455, issue 7211, 369-371

Abstract: Active galactic nuclei: on the hour Although active galactic nuclei (AGNs) are thought — like quasars — to be scaled-up versions of binary black holes, quasiperiodic oscillations have proved elusive in the supermassive black holes found in AGNs. This is surprising, since these oscillations are generally so well defined in black holes. That anomaly has now been straightened out with the observation of X-ray emissions with a periodicity of about 1 hour in the bright active galaxy RE J1034+396. The X-ray modulation arises from the direct vicinity of the black hole. The study of this and similar phenomena should reveal more about accretion flows around black holes.

Date: 2008
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DOI: 10.1038/nature07277

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