Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-11
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS. 7 pages, 6 figures
Scientific paper
10.1111/j.1365-2966.2008.13840.x
We investigated the influence of environment on cluster galaxies by examining the alignment of the brightest cluster galaxy (BCG) position angle with respect to the host cluster X-ray position angle. The cluster position angles were measured using high spatial resolution X-ray data taken from the Chandra ACIS archive, that significantly improved the determination of the cluster shape compared to the conventional method of using optical images. Meanwhile, those of the BCGs were measured using homogeneous dataset composed of high spatial resolution optical images taken with Suprime-Cam mounted on Subaru 8m telescope. We found a strong indication of an alignment between the cluster X-ray emission and optical light from BCGs, while we see no clear direct correlation between the degree of ellipticity of X-ray and optical BCG morphologies, despite the apparent alignment of two elliptical structures. We have also investigated possible dependence of the position angle alignment on the X-ray morphology of the clusters, and no clear trends are found. The fact that no trends are evident regarding frequency or degree of the alignment with respect to X-ray morphology may be consistent with an interpretation as a lack of dependence on the dynamical status of clusters.
Boehringer Hans
Hashimoto Yasuhiro
Henry Patrick J.
No associations
LandOfFree
Alignment of Galaxies and Clusters 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 Alignment of Galaxies and Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alignment of Galaxies and Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-474363