---
_id: '17709'
abstract:
- lang: eng
  text: 'We study very-high rate spherically symmetric accretion flows onto a massive
    black hole (BH; 10^2 < M_BH < 10^6 Msun) embedded in a dense gas cloud with a
    low abundance of metals, performing one-dimensional hydrodynamical simulations
    which include multi-frequency radiation transfer and non-equilibrium primordial
    chemistry. We find that rapid gas supply from the Bondi radius at a hyper-Eddington
    rate can occur without being impeded by radiation feedback when (n/10^5 cm^-3)
    > (M_BH/10^4Msun)^{-1}(T/10^4 K)^{3/2}, where n and T are the density and temperature
    of ambient gas outside of the Bondi radius. The resulting accretion rate in this
    regime is steady, and larger than 3000 times the Eddington rate. At lower Bondi
    rates, the accretion is episodic due to radiative feedback and the average rate
    is limited below the Eddington rate. For the hyper-Eddington case, the steady
    solution consists of two parts: a radiation-dominated central core, where photon
    trapping due to electron scattering is important, and an accreting envelope which
    follows a Bondi profile with T~8000 K. When the emergent luminosity is limited
    below the Eddington luminosity because of photon trapping, radiation from the
    central region does not affect the gas dynamics at larger scales. We apply our
    result to the rapid formation of massive BHs in protogalaxies with a virial temperature
    of T_vir> 10^4 K. Once a seed BH forms at the center of the galaxy, it can grow
    up to a maximum ~10^5 (T_vir/10^4 K) Msun via gas accretion independent of the
    initial BH mass. Finally, we discuss possible observational signatures of rapidly
    accreting BHs with/without allowance for dust. We suggest that these systems could
    explain Lya emitters without X-rays and luminous infrared sources with hot dust
    emission, respectively.'
article_processing_charge: No
article_type: original
author:
- first_name: Kohei
  full_name: Inayoshi, Kohei
  last_name: Inayoshi
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
- first_name: Jeremiah P.
  full_name: Ostriker, Jeremiah P.
  last_name: Ostriker
citation:
  ama: Inayoshi K, Haiman Z, Ostriker JP. Hyper-Eddington accretion flows on to massive
    black holes. <i>Monthly Notices of the Royal Astronomical Society</i>. 2016;459(4):3738-3755.
    doi:<a href="https://doi.org/10.1093/mnras/stw836">10.1093/mnras/stw836</a>
  apa: Inayoshi, K., Haiman, Z., &#38; Ostriker, J. P. (2016). Hyper-Eddington accretion
    flows on to massive black holes. <i>Monthly Notices of the Royal Astronomical
    Society</i>. Oxford University Press. <a href="https://doi.org/10.1093/mnras/stw836">https://doi.org/10.1093/mnras/stw836</a>
  chicago: Inayoshi, Kohei, Zoltán Haiman, and Jeremiah P. Ostriker. “Hyper-Eddington
    Accretion Flows on to Massive Black Holes.” <i>Monthly Notices of the Royal Astronomical
    Society</i>. Oxford University Press, 2016. <a href="https://doi.org/10.1093/mnras/stw836">https://doi.org/10.1093/mnras/stw836</a>.
  ieee: K. Inayoshi, Z. Haiman, and J. P. Ostriker, “Hyper-Eddington accretion flows
    on to massive black holes,” <i>Monthly Notices of the Royal Astronomical Society</i>,
    vol. 459, no. 4. Oxford University Press, pp. 3738–3755, 2016.
  ista: Inayoshi K, Haiman Z, Ostriker JP. 2016. Hyper-Eddington accretion flows on
    to massive black holes. Monthly Notices of the Royal Astronomical Society. 459(4),
    3738–3755.
  mla: Inayoshi, Kohei, et al. “Hyper-Eddington Accretion Flows on to Massive Black
    Holes.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 459, no.
    4, Oxford University Press, 2016, pp. 3738–55, doi:<a href="https://doi.org/10.1093/mnras/stw836">10.1093/mnras/stw836</a>.
  short: K. Inayoshi, Z. Haiman, J.P. Ostriker, Monthly Notices of the Royal Astronomical
    Society 459 (2016) 3738–3755.
date_created: 2024-09-06T08:54:12Z
date_published: 2016-04-12T00:00:00Z
date_updated: 2024-09-25T12:00:22Z
day: '12'
doi: 10.1093/mnras/stw836
extern: '1'
intvolume: '       459'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1093/mnras/stw836
month: '04'
oa: 1
oa_version: Published Version
page: 3738-3755
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
  issn:
  - 0035-8711
  - 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hyper-Eddington accretion flows on to massive black holes
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 459
year: '2016'
...