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Implication of Dark Matter Content in Dwarf Spheroidal Galaxies

Published online by Cambridge University Press:  25 May 2016

H. Hirashita ,
T. T. Takeuchi  and
H. Kamaya
H. Hirashita
Affiliation:
Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
T. T. Takeuchi
Affiliation:
Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
H. Kamaya
Affiliation:
Department of Physics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan

Abstract

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We investigate the dark matter (DM) content in the Local Group dwarf spheroidal galaxies (dSphs) by examining the correlations among their physical quantities. Two origins of the large velocity dispersions of the dSphs are possible: [1] the existence of DM and [2] tidal heating by the Galaxy. The correlation tests support both [1] and [2]. We finally mention circumstantial evidence for the existence of DM in the dSphs.

Type
Part 4. Morphology, Kinematics and Dynamics
Information
Symposium - International Astronomical Union , Volume 192: The Stellar Content of Local Group Galaxies , 1999 , pp. 402 - 408
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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