Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-03-02
Astrophys.J.697:269-274,2009
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
acc ApJ
Scientific paper
10.1088/0004-637X/697/1/269
The dwarf satellite galaxies in the Local Group are generally considered to be hosted in dark matter subhalos that survived the disruptive processes during infall onto their host halos. It has recently been argued that if the majority of satellites entered the Milky Way halo in a group rather than individually, this could explain the spatial and dynamical peculiarities of its satellite distribution. Such groups were identified as dwarf galaxy associations that are found in the nearby Universe. In this paper we address the question whether galaxies in such associations can be the progenitors of the Milky Way satellite galaxies. We find that the dwarf associations are much more extended than would be required to explain the disk-like distribution of the Milky Way and Andromeda satellite galaxies. We further identify a possible minor filamentary structure, perpendicular to the supergalactic plane, in which the dwarf associations are located, that might be related to the direction of infall of a progenitor galaxy of the Milky Way satellites, if they are of tidal origin.
Hensler Gerhard
Jerjen Helmut
Kroupa Pavel
Metz Manuel
Theis Christian
No associations
LandOfFree
Did the Milky Way dwarf satellites enter the halo as a group? 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 Did the Milky Way dwarf satellites enter the halo as a group?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Did the Milky Way dwarf satellites enter the halo as a group? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-651777