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Cited by 38Astrophysical Phenomena and ObservationsGalaxies: Formation, Evolution, PhenomenaAstrophysics and Star Formation Studies

Molecular Gas Feeding the Circumnuclear Disk of the Galactic Center

Open access
Hsieh, Pei-Ying, Koch, Patrick M., Ho, Paul T. P., Kim, Woong-Tae, Tang, Ya-Wen, Wang, Hsiang-Hsu, Yen, Hsi-Wei, Hwang, Chorng-Yuan·2017·The Astrophysical Journal
DOI 10.3847/1538-4357/aa8329
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Abstract

The interaction between a supermassive black hole (SMBH) and the surrounding material is of primary importance in modern astrophysics. The detection of the molecular 2 pc circumnuclear disk (CND) immediately around the Milky Way SMBH, SgrA*, provides a unique opportunity to study SMBH accretion at subparsec scales. Our new wide-field CS(J = 2 − 1) map toward the Galactic center (GC) reveals multiple dense molecular streamers that originated from the ambient clouds 20 pc further out, and that are connected to the central 2 pc of the CND. These dense gas streamers appear to carry gas directly toward the nuclear region and might be captured by the central potential. Our phase-plot analysis indicates that these streamers show a signature of rotation and inward radial motion with progressively higher velocities as the gas approaches the CND and finally ends up corotating with the CND. Our results might suggest a possible mechanism of gas feeding the CND from 20 pc around 2 pc in the GC. In this paper, we discuss the morphology and the kinematics of these streamers. As the nearest observable Galactic nucleus, this feeding process may have implications for understanding the processes in extragalactic nuclei.

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  • There is some evidence of molecular filaments connecting the CND to a molecular cloud at ~20 pc away, suggesting the CND could have formed during a close passage of such a cloud.

    “There is some evidence of molecular filaments connecting the CND to a molecular cloud at ∼ 20 pc away, suggesting that the CND could have formed during a close passage of such a cloud (Hsieh et al. 2017, 2018).”

    From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Hsieh et al. 2017

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Research works printed but not linked: 2

  1. Herrnstein, R. M., & Ho, P. T. P. 2005b, ApJ, 620, 287 · DOI
  2. Zylka, R., Güsten, R., Philipp, S., et al. 1999, in ASP Conf. Ser. 186, The Central Parsecs of the Galaxy, ed. H. Falcke et al. (San Francisco, CA: ASP), 415

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Authors
Hsieh, P.-Y., Koch, P. M., Ho, P. T. P., Kim, W.-T., Tang, Y.-W., Wang, H.-H., Yen, H.-W., & Hwang, C.-Y.
Affiliations
  • Institute of Astronomy and Astrophysics, Academia Sinica (TW)
  • Seoul National University (KR)
  • Chinese University of Hong Kong (HK)
  • European Southern Observatory (DE)
  • National Central University (TW)
Corresponding author
Hsieh, Pei-Ying
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2017-09-14
Volume
847
Issue
1
Pages
3
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.3847/1538-4357/aa8329
OpenAlex
W2751107139
Cited by
38
References
37
Citations by year
2026: 7 · 2025: 3 · 2024: 4 · 2023: 7 · 2021: 5 · 2020: 3 · 2019: 3 · 2018: 6
FWCI
1.80
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • Seoul National University Open Repository (Seoul National University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Research Foundation
  • Academia Sinica
  • National Research Foundation of Korea
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
Keywords
circumnuclear disk, Galactic Center, Sgr A*, supermassive black hole accretion, molecular gas, gas kinematics, phase space analysis, carbon monoxide emissions, nuclear starburst

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