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Measure the local dark matter density with LAMOST spectroscopic survey

Published online by Cambridge University Press:  09 May 2016

Chao Liu ,
Qiran Xia  and
Shude Mao
Chao Liu
Affiliation:
Key Lab of Optical Astronomy, National Astronomical Observatories, CAS, BeijingChina email: [email protected]
Qiran Xia
Affiliation:
National Astronomical Observatories, CAS, 20A Datun Road, Chaoyang District, 100012, Beijing, China
Shude Mao
Affiliation:
National Astronomical Observatories, CAS, 20A Datun Road, Chaoyang District, 100012, Beijing, China Center for Astrophysics, Department of Physics, Tsinghua University, 10086, Beijing, China Jodrell Bank Centre for Astrophysics, The University of Manchester, Alan Turing Building, Manchester M13 9PL, UK
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Abstract

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The local dark matter density plays the key role in the distribution of the dark matter halo near the Galactic disk. It will also answer whether a dark matter disk exists in the Milky Way. We measure the local dark matter density with LAMOST observed stars located at around the north Galactic pole. The selection effects of the observations are well considered and corrected. We find that the derived DM density, which is around 0.0159+0.0047−0.0057M⊙ pc−3 providing a flat local rotation curve.

Keywords

Galaxy: kinematics and dynamics – Galaxy: disc – dark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 330 - 331
Copyright
Copyright © International Astronomical Union 2016 

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