A possible relativistic jetted outburst from a massive black hole fed by a tidally disrupted star |
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Authors: | Bloom Joshua S Giannios Dimitrios Metzger Brian D Cenko S Bradley Perley Daniel A Butler Nathaniel R Tanvir Nial R Levan Andrew J O'Brien Paul T Strubbe Linda E De Colle Fabio Ramirez-Ruiz Enrico Lee William H Nayakshin Sergei Quataert Eliot King Andrew R Cucchiara Antonino Guillochon James Bower Geoffrey C Fruchter Andrew S Morgan Adam N van der Horst Alexander J |
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Institution: | Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA. jbloom@astro.berkeley.edu |
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Abstract: | Gas accretion onto some massive black holes (MBHs) at the centers of galaxies actively powers luminous emission, but most MBHs are considered dormant. Occasionally, a star passing too near an MBH is torn apart by gravitational forces, leading to a bright tidal disruption flare (TDF). Although the high-energy transient Sw 1644+57 initially displayed none of the theoretically anticipated (nor previously observed) TDF characteristics, we show that observations suggest a sudden accretion event onto a central MBH of mass about 10(6) to 10(7) solar masses. There is evidence for a mildly relativistic outflow, jet collimation, and a spectrum characterized by synchrotron and inverse Compton processes; this leads to a natural analogy of Sw 1644+57 to a temporary smaller-scale blazar. |
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