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  Tidal disruptions in circumbinary disks. II: Observational signatures in the reverberation spectra

Brem, P., Cuadra, J., Amaro-Seoane, P., & Komossa, S. (2014). Tidal disruptions in circumbinary disks. II: Observational signatures in the reverberation spectra. The Astrophysical Journal, 792(2): 100. doi:10.1088/0004-637X/792/2/100.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-7592-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-7594-0
Genre: Journal Article

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 Creators:
Brem, Patrick1, Author
Cuadra, Jorge, Author
Amaro-Seoane, Pau1, Author              
Komossa, S., Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: Astrophysics, Galaxy Astrophysics, astro-ph.GA, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: Supermassive Binary Black Holes (SMBBHs) with sub-pc separations form in the course of galaxy mergers, if both galaxies harbour massive black holes. Clear observational evidence for them however still eludes us. We propose a novel method of identifying these systems by means of reverberation mapping their circumbinary disk after a tidal disruption event has ionized it. The tidal disruption of a star at the secondary leads to strong asymmetries in the disk response. We model the shape of the velocity--delay maps for various toy disk models and more realistic gas distributions obtained by SPH simulations. The emissivity of the ionized disk is calculated with {\em Cloudy}. We find peculiar asymmetries in the maps for off center ionizing sources that may help us constrain geometrical parameters of a circumbinary disk such as semi-major axis and orbital phase of the secondary, as well as help strengthen the observational evidence for sub-parsec SMBBHs as such.

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 Dates: 2014-07-142014
 Publication Status: Published in print
 Pages: 10 pages, 5 figures. Accepted for publication in ApJ
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1407.3791
DOI: 10.1088/0004-637X/792/2/100
 Degree: -

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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 792 (2) Sequence Number: 100 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: /journals/resource/954922828215_3