Multi-Band Analysis of Abell 2255
Abstract
We analyzed the data for the nearby cluster of galaxies Abell 2255 from archival XMM-Newton observations in order to search for the properties of X-ray point like structures in the outskirts. 11 point-like X-ray emission is detected. Detected X-ray sources are then observed with the 1.5 meter RTT-150 at Turkish National Observatory for possible optical counterparts. The cluster field is covered through 5 ANDOR photometer pointings. 3 sources have no optical follow-ups. 2 QSOs and 1 star are observed from the field. For 4 sources we have obtained the corresponding redhifts. The cumulative log(N)-log(S) is studied and the cluster source number is calculated to be 4 times higher than the field at Fx~10E-13 ergs cm-2 s-1. This phenomenon is interpreted as increased galaxy activity as they first encounter high density ICM environment at the cluster outskirt. We suggest that X-ray emission is triggered by either increased accretion onto LMXBs, fueling of AGNs and/or awakening of BHs.
Cite
@article{arxiv.0803.2168,
title = {Multi-Band Analysis of Abell 2255},
author = {M. Hudaverdi and E. N. Ercan and A. Mert-Ankar and F. Gok and E. Aktekin and G. I. Gun and B. Ugras and T. Guver and H. Kunieda},
journal= {arXiv preprint arXiv:0803.2168},
year = {2008}
}
Comments
19 pages, 22 figures