Direct feeding of the black hole at the Galactic Centre with radial gas streams from close-in stellar winds
Open accessAbstract
We show that the recently discovered orbits of massive stars with closest approach of ∼103 Schwarzschild radii from Sgr A* allow winds from these stars to provide the required mass deposition rate near the black hole horizon. The observed luminosity of Sgr A* does not require viscous transport of angular momentum, as long as the total wind mass loss rate reaches ∼10−6 M⊙ yr−1 from the close-in stars. The specific orbits of the nearest stars should cause modulation of the radio and infrared flux from Sgr A* on a time-scale of years in a predictable fashion.
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This accretion rate is consistent with the accretion of stellar wind material from nearby Wolf-Rayet stars.
“This accretion rate is found to be consistent with the accretion of stellar wind material from nearby Wolf-Rayet stars (Loeb 2004; Mo´ scibrodzka et al. 2006; Ressler et al. 2020).”
From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Loeb 2004
Cites
Ghez, A. M., Duchêne, G., Matthews, K., Hornstein, S. D., Tanner, A., Larkin, J., Morris, M., Becklin, E. E., Salim, S., Kremenek, T., et al. (2003) · The Astrophysical Journal · doi:10.1086/374804 · Cited by 717 · see citing works
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MONITORING STELLAR ORBITS AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER
Gillessen, S., Eisenhauer, F., Trippe, S., Alexander, T., Genzel, R., Martins, F., & Ott, T. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/692/2/1075 · Cited by 1,779 · see citing works
Stellar processes near the massive black hole in the Galactic center
Alexander, T. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.08.002 · Cited by 302 · see citing works
The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way
Sarkar, K. C. (2024) · The Astronomy and Astrophysics Review · doi:10.1007/s00159-024-00152-1 · Cited by 34 · see citing works
“This accretion rate is found to be consistent with the accretion of stellar wind material from nearby Wolf-Rayet stars (Loeb 2004; Mo´scibrodzka et al. 2006; Ressler et al. 2020).”
Result
- Authors
- Loeb, A.
- Affiliations
- Harvard University (US)
- Corresponding author
- Loeb, Abraham
- ORCID
- Loeb, Abraham
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-05
- Volume
- 350
- Issue
- 2
- Pages
- 725-728
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2004141682
- Cited by
- 52
- References
- 1
- Citations by year
- 2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 1 · 2014: 3 · 2013: 3 · 2012: 2
- FWCI
- 2.56
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Monthly Notices of the Royal Astronomical Society (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Keywords
- Sgr A*, black hole accretion, stellar winds, massive stars, close approach, mass deposition rate, angular momentum transport, accretion luminosity, accretion variability, stellar orbits
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