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

Shunya Takekawa; Tomoharu Oka; Kunihiko Tanaka

doi:10.1017/S1743921316011844

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

Shunya Takekawa, Tomoharu Oka, Kunihiko Tanaka

Department of Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	145-146
Number of pages	2
Journal	Proceedings of the International Astronomical Union
Volume	11
DOIs	https://doi.org/10.1017/S1743921316011844
Publication status	Published - 2016

Keywords

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

ASJC Scopus subject areas

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1017/S1743921316011844

Cite this

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title = "Physical contact between the +20 km s-1 cloud and the galactic circumnuclear disk",

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.",

keywords = "Galaxy: center, ISM: molecules, galaxies: nuclei, radio lines: ISM",

author = "Shunya Takekawa and Tomoharu Oka and Kunihiko Tanaka",

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year = "2016",

doi = "10.1017/S1743921316011844",

language = "English",

volume = "11",

pages = "145--146",

journal = "Proceedings of the International Astronomical Union",

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T1 - Physical contact between the +20 km s-1 cloud and the galactic circumnuclear disk

AU - Takekawa, Shunya

AU - Oka, Tomoharu

AU - Tanaka, Kunihiko

N1 - Publisher Copyright: © International Astronomical Union 2017.

PY - 2016

Y1 - 2016

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 - ISM: molecules

KW - galaxies: nuclei

KW - radio lines: ISM

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