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The Galactic mass distribution from the LAMOST Galactic spectroscopic surveys

Published online by Cambridge University Press:  07 March 2018

Y. Huang ,
X.-W. Liu ,
H.-B. Yuan ,
H.-W. Zhang ,
M.-S. Xiang ,
B.-Q. Chen  and
C. Wang
Y. Huang
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China email: [email protected] LAMOST Fellow (Supported by Special fund budgeted and administrated by CAMS)
X.-W. Liu
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China email: [email protected]
H.-B. Yuan
Affiliation:
Department of Astronomy, Beijing Normal University, Beijing 100875, China
H.-W. Zhang
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China email: [email protected]
M.-S. Xiang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China LAMOST Fellow (Supported by Special fund budgeted and administrated by CAMS)
B.-Q. Chen
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China email: [email protected] LAMOST Fellow (Supported by Special fund budgeted and administrated by CAMS)
C. Wang
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China email: [email protected]
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Abstract

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Using the data from the LAMOST Galactic spectroscopic surveys and some other surveys, we have started a series of work to measure the mass distribution of our Galaxy. As a result of the first-stage, we have constructed the Galactic rotation curve out to 100 kpc and the Galactic escape velocity curve between 5 and 14 kpc. From the two curves, we have built parametrized mass models for our Galaxy, respectively. Both models yield a similar result for the Milky Way's virial mass: ~ 0.9 × 1012 M⊙.

Keywords

Galaxy: fundamental parametersGalaxy: kinematics and dynamicsdark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 220 - 221
Copyright
Copyright © International Astronomical Union 2018 

References

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