A model for lopsided galactic disks - INSPIRE

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A model for lopsided galactic disks

Mar, 1998

10 pages

Published in:

Astrophys.J.Lett. 496 (1998) L13

e-Print:

astro-ph/9803146 [astro-ph]

DOI:

10.1086/311239

Report number:

WISC-AP-676

View in:

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Abstract: (arXiv)

Many disk galaxies are lopsided: their brightest inner parts are displaced from the center of the outer isophotes, or the outer contours of the HI disk. This asymmetry is particularly common in small, low-luminosity galaxies. We argue here that long-lived lopsidedness is a consequence of the disk lying off-center in the potential of the galaxy's extended dark halo, and spinning in a sense retrograde to its orbit about the halo center. The stellar velocity field predicted by our gravitational N-body simulations is clearly asymmetric.

References(35)

Figures(0)

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