---
_id: '17568'
abstract:
- lang: eng
  text: Stellar-mass BHs (sBHs) are predicted to be embedded in active galactic nuclei
    (AGN) disks due to gravitational drag and in-situ star formation. However, we
    find that due to a high gas density in an AGN disk environment, compact objects
    may rapidly grow to intermediate-mass BHs and deplete matter from the AGN disk
    unless accretion is suppressed by some feedback process(es). These consequences
    are inconsistent with AGN observations and the dynamics of the Galactic center.
    Here we consider mechanical feedback mechanisms for the reduction of gas accretion.
    Rapidly accreting sBHs launch winds and/or jets via the Blandford-Znajek mechanism,
    which produce high-pressure shocks and cocoons. Such a shock and cocoon can spread
    laterally in the plane of the disk, eject the outer regions of a circum-sBH disk
    (CsBD) and puncture a hole in the AGN disk with horizontal size comparable to
    the disk scale-height. Since the depletion timescale of the bound CsBD is much
    shorter than the resupply timescale of gas to the sBH, the time-averaged accretion
    rate onto sBHs is reduced by this process by a factor of ∼10--100. This feedback
    mechanism can therefore help alleviate the sBH over-growth and AGN-disk depletion
    problems. On the other hand, we find that cocoons of jets can unbind a large fraction
    of the gas accreting in the disks of less massive SMBHs, which may help explain
    the dearth of high-Eddington ratio AGNs with SMBH mass ≲105M⊙.
article_number: '41'
article_processing_charge: No
article_type: original
author:
- first_name: Hiromichi
  full_name: Tagawa, Hiromichi
  last_name: Tagawa
- first_name: Shigeo S.
  full_name: Kimura, Shigeo S.
  last_name: Kimura
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
- first_name: Rosalba
  full_name: Perna, Rosalba
  last_name: Perna
- first_name: Hidekazu
  full_name: Tanaka, Hidekazu
  last_name: Tanaka
- first_name: Imre
  full_name: Bartos, Imre
  last_name: Bartos
citation:
  ama: Tagawa H, Kimura SS, Haiman Z, Perna R, Tanaka H, Bartos I. Can stellar-mass
    black hole growth disrupt disks of active galactic nuclei? The role of mechanical
    feedback. <i>The Astrophysical Journal</i>. 2022;927(1). doi:<a href="https://doi.org/10.3847/1538-4357/ac45f8">10.3847/1538-4357/ac45f8</a>
  apa: Tagawa, H., Kimura, S. S., Haiman, Z., Perna, R., Tanaka, H., &#38; Bartos,
    I. (2022). Can stellar-mass black hole growth disrupt disks of active galactic
    nuclei? The role of mechanical feedback. <i>The Astrophysical Journal</i>. American
    Astronomical Society. <a href="https://doi.org/10.3847/1538-4357/ac45f8">https://doi.org/10.3847/1538-4357/ac45f8</a>
  chicago: Tagawa, Hiromichi, Shigeo S. Kimura, Zoltán Haiman, Rosalba Perna, Hidekazu
    Tanaka, and Imre Bartos. “Can Stellar-Mass Black Hole Growth Disrupt Disks of
    Active Galactic Nuclei? The Role of Mechanical Feedback.” <i>The Astrophysical
    Journal</i>. American Astronomical Society, 2022. <a href="https://doi.org/10.3847/1538-4357/ac45f8">https://doi.org/10.3847/1538-4357/ac45f8</a>.
  ieee: H. Tagawa, S. S. Kimura, Z. Haiman, R. Perna, H. Tanaka, and I. Bartos, “Can
    stellar-mass black hole growth disrupt disks of active galactic nuclei? The role
    of mechanical feedback,” <i>The Astrophysical Journal</i>, vol. 927, no. 1. American
    Astronomical Society, 2022.
  ista: Tagawa H, Kimura SS, Haiman Z, Perna R, Tanaka H, Bartos I. 2022. Can stellar-mass
    black hole growth disrupt disks of active galactic nuclei? The role of mechanical
    feedback. The Astrophysical Journal. 927(1), 41.
  mla: Tagawa, Hiromichi, et al. “Can Stellar-Mass Black Hole Growth Disrupt Disks
    of Active Galactic Nuclei? The Role of Mechanical Feedback.” <i>The Astrophysical
    Journal</i>, vol. 927, no. 1, 41, American Astronomical Society, 2022, doi:<a
    href="https://doi.org/10.3847/1538-4357/ac45f8">10.3847/1538-4357/ac45f8</a>.
  short: H. Tagawa, S.S. Kimura, Z. Haiman, R. Perna, H. Tanaka, I. Bartos, The Astrophysical
    Journal 927 (2022).
date_created: 2024-09-05T12:13:22Z
date_published: 2022-03-03T00:00:00Z
date_updated: 2024-09-18T14:57:06Z
day: '03'
doi: 10.3847/1538-4357/ac45f8
extern: '1'
intvolume: '       927'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.3847/1538-4357/ac45f8
month: '03'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
  issn:
  - 0004-637X
  - 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Can stellar-mass black hole growth disrupt disks of active galactic nuclei?
  The role of mechanical feedback
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 927
year: '2022'
...