Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-24
Astrophys.J.642:L41-L44,2006
Astronomy and Astrophysics
Astrophysics
accepted for publication in ApJ Letters; 4 figures (2 color)
Scientific paper
10.1086/504522
We present multifiber echelle radial velocity results for 551 stars in the Sextans dwarf spheroidal galaxy and identify 294 stars as probable Sextans members. The projected velocity dispersion profile of the binned data remains flat to a maximum angular radius of $30^{\prime}$. We introduce a nonparametric technique for estimating the projected velocity dispersion surface, and use this to search for kinematic substructure. Our data do not confirm previous reports of a kinematically distinct stellar population at the Sextans center. Instead we detect a region near the Sextans core radius that is kinematically colder than the overall Sextans sample with 95% confidence.
Mateo Mario
Olszewski Edward W.
Pal Jayanta Kumar
Sen Bodhisattva
Walker Matthew G.
No associations
LandOfFree
On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy 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 On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-434233