Searching for orbital motion close to the black hole in NGC 3516

Details Searching for orbital motion close to the black hole in NGC 3516 Searching for orbital motion close to the black hole in NGC 3516

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop...18m&link_type=abstract

XMM-Newton Proposal ID #04003701

Astronomy and Astrophysics

Astrophysics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ngc 3516, Xmm-Newton Proposal 04003701

Scientific paper

We have reported a modulation in energy and flux of a 6 keV emission feature in NGC 3516 with XMM--Newton. The evolution appears to be cyclic with a timescale of 25 ks and agrees with the feature being an Fe K line emitted from an orbiting structure in the inner accretion disc. Theoretical modelling led to the X--ray estimate of the black hole mass from emission in the immediate vicinity of the black hole. Further long XMM--Newton observations of NGC 3516 are needed to confirm this potential breakthrough in black hole astrophysics. The scientific potential is such that direct probes of the inner accretion flow and of the spacetime geometry close to the black hole can be obtained, including constraints on black hole spin and on the radial drift induced by the accretion process itself.

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