Orientations of very faint galaxies in the Coma cluster

Details Orientations of very faint galaxies in the Coma cluster Orientations of very faint galaxies in the Coma cluster

2008-10-02

arxiv.org/abs/0810.0357v1

Astronomy and Astrophysics

Astrophysics

Accepted in A&A

Scientific paper

10.1051/0004-6361:200810535

We have then searched for preferential orientations of faint galaxies in the Coma cluster (down I_Vega~-11.5). By applying a deconvolution method to deep u* and I band images of the Coma cluster, we were able to recover orientations down to faint magnitudes. No preferential orientations are found in more than 95% of the cluster, and the brighter the galaxies, the fewer preferential orientations. The minor axes of late type galaxies are radially oriented along a northeast -southwest direction and are oriented north-south in the western X-ray sub- structures. For early type galaxies, in the western regions showing significant preferential orientations, galaxy major axes are oriented perpendicularly to the north-south direction. In the eastern significant region and close to NGC 4889, galaxy major axes also point toward the 2 cluster dominant galaxies. In the southern significant regions, galaxy planes are tangential with respect to the clustercentric direction, except close to (alpha=194.8, delta=27.65) where the orientation is close to -15deg. Part of the orientations of the minor axes of late type galaxies and of the major axes of early type galaxies can be explained by a tidal torque model applied to cosmological filaments and local merging directions. Another part (close to NGC4889) can be accounted for by collimated infalls. For early type galaxies, the (alpha=194.8, delta=27.65) region shows orientations that probably result from processes involving induced star formation.

Affiliated with

Also associated with

No associations

Rating

Orientations of very faint galaxies in the Coma cluster 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 Orientations of very faint galaxies in the Coma cluster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orientations of very faint galaxies in the Coma cluster will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-491981