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A model for lopsided galactic disks

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arxiv astro-ph/9803146 v1 pith:3EQR5JVC submitted 1998-03-12 astro-ph

A model for lopsided galactic disks

classification astro-ph
keywords diskcentergalaxieshalolopsidedouterargueasymmetric
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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.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The size of the HI disk across different environments: isolated, compact groups, clusters, and pairs

    astro-ph.GA 2026-07 conditional novelty 6.0

    Compact-group galaxies have HI disks at least ~71% smaller than isolated galaxies of the same optical size, with truncation increasing along the group evolutionary sequence.