On the Stability of a Magnetized Disk with a Massive Corotating Halo

Chin. Phys. Lett.

2001, Vol. 18

Issue (4): 619-621 DOI:

Original Articles

On the Stability of a Magnetized Disk with a Massive Corotating Halo

CHOU Chih-Kang¹;PENG Qiu-He^1,2

¹Institute of Astronomy and Department of Physics, National Central University, Chung-Li, Taiwan 32054 ²Department of Astronomy, Nanjing University, Nanjing 210093

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CHOU Chih-Kang, PENG Qiu-He 2001 Chin. Phys. Lett. 18 619-621

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Abstract Effects of magnetic fields on the stability of a differentially rotating disk are considered in the shearing sheet approximation. An explicit stability criterion is derived in terms of Toomre's Q value and the field strength. The combined effects of both magnetic fields and a corotating dark matter halo are briefly discussed.

Keywords: 98.62.Gq 98.62.Hr 98.35.Gi 95.35.+d

Published: 01 April 2001

PACS:	98.62.Gq	(Galactic halos)
	98.62.Hr	(Spiral arms and bars; galactic disks)
	98.35.Gi	(Galactic halo)
	95.35.+d	(Dark matter)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2001/V18/I4/0619

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