Physical contact between the +20 km s-1 cloud and the galactic circumnuclear disk

Shunya Takekawa, Tomoharu Oka, Kunihiko Tanaka

Research output: Contribution to journalArticle

Abstract

We report the discovery of physical contact between the Galactic circumnuclear disk (CND) and an adjacent giant molecular cloud. The central 10 pc of our Galaxy has been imaged in molecular lines at millimeter wavelength using the Nobeyama Radio Observatory 45 m radio telescope. In the position-velocity maps of several high-density probe lines, we have found an emission bridge connecting the +20 km s-1 cloud (M-0.13-0.08) and the negative longitude extension of the CND. The collision between the +20 km s-1 cloud and the CND may be responsible for the formation of the bridge. This event can promote mass accretion onto the CND and/or into the inner cavity.

Original languageEnglish
Pages (from-to)145-146
Number of pages2
JournalProceedings of the International Astronomical Union
Volume11
DOIs
Publication statusPublished - 2016

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radio
cavity
observatory
collision
accretion
probe
wavelength
radio telescopes
longitude
molecular clouds
observatories
galaxies
cavities
collisions
probes
wavelengths

Keywords

  • galaxies: nuclei
  • Galaxy: center
  • ISM: molecules
  • radio lines: ISM

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

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abstract = "We report the discovery of physical contact between the Galactic circumnuclear disk (CND) and an adjacent giant molecular cloud. The central 10 pc of our Galaxy has been imaged in molecular lines at millimeter wavelength using the Nobeyama Radio Observatory 45 m radio telescope. In the position-velocity maps of several high-density probe lines, we have found an emission bridge connecting the +20 km s-1 cloud (M-0.13-0.08) and the negative longitude extension of the CND. The collision between the +20 km s-1 cloud and the CND may be responsible for the formation of the bridge. This event can promote mass accretion onto the CND and/or into the inner cavity.",
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AU - Takekawa, Shunya

AU - Oka, Tomoharu

AU - Tanaka, Kunihiko

PY - 2016

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N2 - We report the discovery of physical contact between the Galactic circumnuclear disk (CND) and an adjacent giant molecular cloud. The central 10 pc of our Galaxy has been imaged in molecular lines at millimeter wavelength using the Nobeyama Radio Observatory 45 m radio telescope. In the position-velocity maps of several high-density probe lines, we have found an emission bridge connecting the +20 km s-1 cloud (M-0.13-0.08) and the negative longitude extension of the CND. The collision between the +20 km s-1 cloud and the CND may be responsible for the formation of the bridge. This event can promote mass accretion onto the CND and/or into the inner cavity.

AB - We report the discovery of physical contact between the Galactic circumnuclear disk (CND) and an adjacent giant molecular cloud. The central 10 pc of our Galaxy has been imaged in molecular lines at millimeter wavelength using the Nobeyama Radio Observatory 45 m radio telescope. In the position-velocity maps of several high-density probe lines, we have found an emission bridge connecting the +20 km s-1 cloud (M-0.13-0.08) and the negative longitude extension of the CND. The collision between the +20 km s-1 cloud and the CND may be responsible for the formation of the bridge. This event can promote mass accretion onto the CND and/or into the inner cavity.

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KW - Galaxy: center

KW - ISM: molecules

KW - radio lines: ISM

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