aa3060-05.pdf (428.77 kB)

# Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

journal contribution
posted on 24.10.2012, 09:05 by M. G. Watson, T. P. Roberts, M. Akiyama, Y. Ueda
We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is > $5 \times 10^{39}~\rm erg\,s^{-1}$ (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.

## Citation

Astronomy & Astrophysics, 2005, 437 (3), pp. 899-904

## Version

VoR (Version of Record)

## Published in

Astronomy & Astrophysics

## Publisher

EDP Sciences for European Southern Observatory (ESO)

0004-6361

2005

24/10/2012

## Publisher version

http://www.aanda.org/articles/aa/abs/2005/27/aa3060-05/aa3060-05.html

en