Merging clusters of galaxies observed with XMM-Newton

Details Merging clusters of galaxies observed with XMM-Newton Merging clusters of galaxies observed with XMM-Newton

2005-01-18

arxiv.org/abs/astro-ph/0501377v1

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures. Use elsart.cls. Accepted for publication in Advances in Space Research. A version with full resolution fi

Scientific paper

10.1016/j.asr.2005.01.029

We present results from the XMM-Newton observations of our ongoing program on merging clusters. To date three clusters have been observed, covering the temporal sequence from early to late stage mergers: A1750, A2065 and A3921. Using spatially-resolved spectroscopy of discrete regions, hardness ratio and temperature maps, we show that all three clusters display a complex temperature structure. In the case of A1750, a double cluster, we argue that the observed temperature structure is not only related to the ongoing merger but also to previous merger events. A2065 seems an excellent example of a `compact merger', i.e. when the centres of the two clusters have just started to interact, producing a shock in the ICM. Using comparisons with numerical simulations and complementary optical data, the highly complex temperature structure evident in A3921 is interpreted as an off-axis merger between two unequal mass components. These results illustrate the complex physics of merger events. The relaxation time can be larger than the typical time between merger events, so that the present day morphology of clusters depends not only on on-going interaction but also on the more ancient formation history.

Affiliated with

Also associated with

No associations

Rating

Merging clusters of galaxies observed with XMM-Newton 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 Merging clusters of galaxies observed with XMM-Newton, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Merging clusters of galaxies observed with XMM-Newton will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-704858