Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-24
Astrophys.J.606:67-77,2004
Astronomy and Astrophysics
Astrophysics
Significantly revised version, accepted for publication in ApJ 11 pages, 6 figures
Scientific paper
10.1086/382726
We present the results of a study of weak lensing by galaxies based on 45.5 deg$^2$ of $R_C$ band imaging data from the Red-Sequence Cluster Survey (RCS). We present the first weak lensing detection of the flattening of galaxy dark matter halos. We use a simple model in which the ellipticity of the halo is $f$ times the observed ellipticity of the lens. We find a best fit value of $f=0.77^{+0.18}_{-0.21}$, suggesting that the dark matter halos are somewhat rounder than the light distribution. The fact that we detect a significant flattening implies that the halos are well aligned with the light distribution. Given the average ellipticity of the lenses, this implies a halo ellipticity of $
Gladders Michael D.
Hoekstra Henk
Yee Howard K. C.
No associations
LandOfFree
Properties of galaxy dark matter halos from weak lensing 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 Properties of galaxy dark matter halos from weak lensing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Properties of galaxy dark matter halos from weak lensing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-68533