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dc.contributor.authorBatcheldor, Daniel P.
dc.contributor.authorRobinson, A.
dc.contributor.authorAxon, D. J.
dc.contributor.authorPerlman, Eric S.
dc.contributor.authorMerritt, D.
dc.date.accessioned2014-11-13T21:50:55Z
dc.date.available2014-11-13T21:50:55Z
dc.date.issued2010-06-09
dc.identifier.citationBatcheldor, D., Robinson, A., Axon, D. J., Perlman, E. S., & Merritt, D. (2010). A displaced supermassive black hole in M87. The Astrophysical Journal Letters, 717(1)en_US
dc.identifier.urihttp://hdl.handle.net/11141/395
dc.description.abstractIsophotal analysis of M87, using data from the Advanced Camera for Surveys, reveals a projected displacement of 6.8 ± 0.8 pc (~0farcs1) between the nuclear point source (presumed to be the location of the supermassive black hole, SMBH) and the photo-center of the galaxy. The displacement is along a position angle of 307° ± 17° and is consistent with the jet axis. This suggests the active SMBH in M87 does not currently reside at the galaxy center of mass, but is displaced in the counter-jet direction. Possible explanations for the displacement include orbital motion of an SMBH binary, gravitational perturbations due to massive objects (e.g., globular clusters), acceleration by an asymmetric or intrinsically one-sided jet, and gravitational recoil resulting from the coalescence of an SMBH binary. The displacement direction favors the latter two mechanisms. However, jet asymmetry is only viable, at the observed accretion rate, for a jet age of >0.1 Gyr and if the galaxy restoring force is negligible. This could be the case in the low-density core of M87. A moderate recoil ~1 Myr ago might explain the disturbed nature of the nuclear gas disk, could be aligned with the jet axis, and can produce the observed offset. Alternatively, the displacement could be due to residual oscillations resulting from a large recoil that occurred in the aftermath of a major merger ≤1 Gyr ago.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. Copyright Law.en_US
dc.rights.urihttp://aas.org/publications/aas-copyright-policyen_US
dc.titleA displaced supermassive black hole in M87en_US
dc.typeArticleen_US
dc.identifier.doi10.1088/2041-8205/717/1/L6


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