Journal article
M0.20-0.033: An Expanding Molecular Shell in the Galactic Center Radio Arc
The Astrophysical journal, Vol.852(1), p.11
01/01/2018
DOI: 10.3847/1538-4357/aa886e
Abstract
We present high-frequency Karl G. Jansky Very Large Array (VLA) continuum and spectral line (NH3, H64 , and H63 ) observations of the Galactic Center Radio Arc region, covering the Sickle H ii region, the Quintuplet cluster, and molecular clouds M0.20−0.033 and M0.10−0.08. These observations show that the two velocity components of M0.20−0.033 (∼25 and 80 km s−1), previously thought to be separate clouds along the same line-of-sight, are physically connected in position-velocity space via a third southern component around 50 km s−1. Further position-velocity analysis of the surrounding region, using lower-resolution survey observations taken with the Mopra and ATCA telescopes, indicates that both molecular components in M0.20−0.033 are physically connected to the M0.10−0.08 molecular cloud, which is suggested to be located on stream 1 in the Kruijssen et al. orbital model. The morphology and kinematics of the molecular gas in M0.20−0.033 indicate that the two velocity components in M0.20−0.033 constitute an expanding shell. Our observations suggest that the M0.20−0.033 expanding shell has an expansion velocity of 40 km s−1, with a systemic velocity of 53 km s−1, comparable to velocities detected in M0.10−0.08. The origin of the expanding shell is located near the Quintuplet cluster, suggesting that the energy and momentum output from this massive stellar cluster may have contributed to the expansion.
Details
- Title: Subtitle
- M0.20-0.033: An Expanding Molecular Shell in the Galactic Center Radio Arc
- Creators
- Natalie Butterfield - University of IowaCornelia C Lang - University of IowaMark Morris - University of California, Los AngelesElisabeth A. C Mills - Boston UniversityJuergen Ott - National Radio Astronomy Observatory
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.852(1), p.11
- DOI
- 10.3847/1538-4357/aa886e
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- The American Astronomical Society
- Number of pages
- 17
- Alternative title
- M0.20-0.033: An Expanding Molecular Shell in the Galactic Center Radio Arc
- Language
- English
- Date published
- 01/01/2018
- Academic Unit
- Liberal Arts and Science Admin; Physics and Astronomy
- Record Identifier
- 9984428680102771
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