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Kinematic detection of the galactic nuclear disc

Abstract:
We report the detection of the Galactic nuclear disc in line-of-sight kinematics of stars, measured with infrared spectroscopy from APOGEE. This stellar component of the nuclear disc has an extent and rotation velocity V ~ 120kms comparable to the gas disc in the central molecular zone. The current data suggest that this disc is kinematically cool and has a small vertical extent of order 50pc. The stellar kinematics suggest a truncation radius/steep decline of the stellar disc at a galactocentric radius R ~ 150pc, and provide tentative evidence for an overdensity at the position of the ring found in the molecular gas disc.
Publication status:
Published
Peer review status:
Peer reviewed

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Files:
Publisher copy:
10.1088/2041-8205/812/2/L21

Authors

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author

Publisher:
American Astronomical Society
Journal:
Astrophysical Journal Letters More from this journal
Volume:
812
Issue:
2
Pages:
L21-L21
Publication date:
2015-10-20
DOI:
EISSN:
2041-8213
ISSN:
2041-8205

Keywords:
Pubs id:
pubs:571058
UUID:
uuid:3a0641b3-487b-40d9-a4ec-404e1e93f4c0
Local pid:
pubs:571058
Source identifiers:
571058
Deposit date:
2016-03-31

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