X-ray sources and their optical counterparts in the globular cluster M 22
Astrophysics
2016-08-30 v1
Abstract
Using XMM-Newton EPIC imaging data, we have detected 50 low-luminosity X-ray sources in the field of view of M 22, where 5 +/- 3 of these sources are likely to be related to the cluster. Using differential optical photometry, we have identified probable counterparts to those sources belonging to the cluster. Using X-ray spectroscopic and timing studies, supported by the optical colours, we propose that the most central X-ray sources in the cluster are cataclysmic variables, millisecond pulsars, active binaries and a blue straggler. We also identify a cluster of galaxies behind this globular cluster.
Keywords
Cite
@article{arxiv.astro-ph/0405571,
title = {X-ray sources and their optical counterparts in the globular cluster M 22},
author = {N. A. Webb and D. Serre and B. Gendre and D. Barret and J. -P. Lasota and L. Rizzi},
journal= {arXiv preprint arXiv:astro-ph/0405571},
year = {2016}
}
Comments
11 pages, 7 figures, accepted for publication in A&A