The alignment of dark matter halos with the cosmic web

Details The alignment of dark matter halos with the cosmic web The alignment of dark matter halos with the cosmic web

2006-06-18

arxiv.org/abs/astro-ph/0606415v2

Astrophys.J.652:L75-L78,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, accepted for publication in ApJ Letters

Scientific paper

10.1086/510330

We investigate the orientation of the axes and angular momentum of dark matter halos with respect to their neighboring voids using high resolution N-body cosmological simulations. We find that the minor axis of halos tends to be aligned along the line joining the halo with the center of the void, and that the major axis is perpendicular to this line. However, we find that the angular momentum of halos does not have any particular orientation. These results may provide information about the mechanisms whereby the large-scale structure of the Universe affects galaxy formation and cast light upon the issue of the orientation of galaxy disks with respect to their host halos.

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