Halo Mass of Three-Dimension Milky Way

Chin. Phys. Lett.

2000, Vol. 17

Issue (5): 385-387 DOI:

Original Articles

Halo Mass of Three-Dimension Milky Way

PENG Fang¹;PENG Qiu He^1,2

¹Department of Astronomy, Nanjing University, Nanjing 210093 ²Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing University, Beijing 100871

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PENG Fang, PENG Qiu He 2000 Chin. Phys. Lett. 17 385-387

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Abstract We emphasize the effects of several factors on halo mass for our Galaxy, such as the disk thickness, the local surface density, and the shape of the rotation curve. By fitting the observed rotation curve of our Galaxy with the five-component model, we deduce a halo with a mass of 6.62x10¹¹ MO within 50kpc and a local density of 0.009Mopc^-3. It is found that the realistic Galaxy needs only about half of the halo mass that the Galaxy with an infinitesmally thin disk requires.

Keywords: 98.35.Gi 98.35.Ce 98.35.Df

Published: 01 May 2000

PACS:	98.35.Gi	(Galactic halo)
	98.35.Ce	(Mass and mass distribution)
	98.35.Df	(Kinematics, dynamics, and rotation)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2000/V17/I5/0385

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