Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations

Details Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations

2005-05-26

arxiv.org/abs/astro-ph/0505523v1

Astrophys.J. 627 (2005) L17-L20

Astronomy and Astrophysics

Astrophysics

To be published in ApJL, 5 pages, 3 figures

Scientific paper

10.1086/432157

Seven cosmological hydrodynamic simulations of disk galaxy formation are analyzed to determine the alignment of the disk within the dark matter halo and the internal structure of the halo. We find that the orientation of the outer halo, beyond ~0.1 r_vir, is unaffected by the presence of the disk. In contrast, the inner halo is aligned such that the halo minor axis aligns with the disk axis. The relative orientation of these two regions of the halo are uncorrelated. The alignment of the disk and inner halo appears to take place simultaneously through their joint evolution. The disconnect between these two regions of the halo should be taken into account when modelling tidal streams in the halos of disk galaxies and when calculating intrinsic alignments of disk galaxies based on the properties of dark matter halos.

Affiliated with

Also associated with

No associations

Rating

Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-117974