A 200-s Quasi-Periodicity Following the Tidal Disruption of a Star by a Dormant Black Hole
arXiv:1208.1046 · doi:10.1126/science.1223940
Abstract
Supermassive black holes (SMBHs; $M\gtrsim10^5\msun$) are known to exist at the centre of most galaxies with sufficient stellar mass. In the local Universe, it is possible to infer their properties from the surrounding stars or gas. However, at high redshifts we require active, continuous accretion to infer the presence of the SMBHs, often coming in the form of long-term accretion in active galactic nuclei. SMBHs can also capture and tidally disrupt stars orbiting nearby, resulting in bright flares from otherwise quiescent black holes. Here, we report on a -s X-ray quasi-periodicity around a previously dormant SMBH located in the centre of a galaxy at redshift . This result may open the possibility of probing general relativity beyond our local Universe.
Published online 2 August 2012 10.1126/science.1223940
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