Black hole demographics from TDE modeling

The occurence rate of tidal disruption events (TDEs) by survey missions depend on the black hole mass function of the galaxies, properties of the stellar cusp and mass of the central black hole. Using a power law density profile with Kroupa mass function, we solve the steady state Fokker-Planck to c...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2018-05, Vol.14 (S342), p.260-262
Main Authors: Mageshwaran, T., Mangalam, A.
Format: Article
Language:English
Subjects:
Astronomical models
Astronomy
Black holes
Celestial bodies
Deposition
Disruption
Galaxies
Parameters
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Summary:The occurence rate of tidal disruption events (TDEs) by survey missions depend on the black hole mass function of the galaxies, properties of the stellar cusp and mass of the central black hole. Using a power law density profile with Kroupa mass function, we solve the steady state Fokker-Planck to calculate the theoretical capture rate of stars by the black hole. Using a steady accretion model, the Schechter black hole mass function (BHMF) and the cosmological parameters, we calculate the detection rate of TDEs for various surveys which is then fit with the observed TDE rates to extract the Schechter parameters. The rate tension between observation (∼10 −5 yr −1 ) and theory (∼10 −4 yr −1 for individual galaxies is explained by the statistical average over the BHMF.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921318007305