John Regan
Forming supermassive black hole seeds under the influence of a nearby anisotropic multifrequency source
Regan, John; Johansson, Peter; Wise, John
Authors
Peter Johansson
John Wise
Abstract
The photodissociation of H2 by a nearby anisotropic source of radiation is seen as a critical component in creating an environment in which a direct collapse black hole may form. Employing radiative transfer we model the effect of multifrequency (0.76–60 eV) radiation on a collapsing halo at high redshift. We vary both the shape of the spectrum which emits the radiation and the distance to the emitting galaxy. We use blackbody spectra with temperatures of T = 104 K and 105 K and a realistic stellar spectrum. We find that an optimal zone exists between 1 and 4 kpc from the emitting galaxy. If the halo resides too close to the emitting galaxy the photoionizing radiation creates a large H II region which effectively disrupts the collapsing halo, too far from the source and the radiation flux drops below the level of the expected background and the H2 fraction remains too high. When the emitting galaxy is initially placed between 1 and 2 kpc from the collapsing halo, with a spectral shape consistent with a star-forming high-redshift galaxy, then a large central core forms. The mass of the central core is between 5000 and 10 000 M⊙ at a temperature of approximately 1000 K. This core is however surrounded by a reservoir of hotter gas at approximately 8000 K, which leads to mass inflow rates of the order of ∼0.1 M⊙ yr−1.
Citation
Regan, J., Johansson, P., & Wise, J. (2016). Forming supermassive black hole seeds under the influence of a nearby anisotropic multifrequency source. Monthly Notices of the Royal Astronomical Society, 459(3), 3377-3394. https://doi.org/10.1093/mnras/stw899
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 14, 2016 |
Online Publication Date | Apr 21, 2016 |
Publication Date | Jul 1, 2016 |
Deposit Date | May 16, 2016 |
Publicly Available Date | May 16, 2016 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 459 |
Issue | 3 |
Pages | 3377-3394 |
DOI | https://doi.org/10.1093/mnras/stw899 |
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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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