Galactic warps induced by material accretion

Details Galactic warps induced by material accretion Galactic warps induced by material accretion

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.9106s&link_type=abstract

American Astronomical Society Meeting 203, #91.06; Bulletin of the American Astronomical Society, Vol. 35, p.1353

Astronomy and Astrophysics

Astronomy

Scientific paper

The outer regions of many edge-on disk galaxies appear noticeably warped with an integral-sign shape. The ubiquity of warps suggests that they are either long-lived or repeatedly regenerated. One of the promising methods to generate warps is by accretion of material with misaligned angular momentum (Jiang & Binney 1999). We study this process using grid-based N-body methods that allow large numbers of particles to be employed but introduce a preferred plane. We present tests that show that the grid effects are under control. Our simulations include the random motions of disk stars and explore disk-halo coupling in more detail. We pay particular attention to whether or not the resultant warps follow Briggs's rules of warp behavior.

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