X-RAY SOURCES IN THE DWARF SPHEROIDAL GALAXY DRACO

E. Sonbas, B. Rangelov, O. Kargaltsev, K. S. Dhuga, J. Hare, I. Volkov
2016 Astrophysical Journal  
We present the spectral analysis of an 87 ks XMM-Newton observation of Draco, a nearby dwarf spheroidal galaxy. Of the approximately 35 robust X-ray source detections, we focus our attention on the brightest of these sources, for which we report X-ray and multiwavelength parameters. While most of the sources exhibit properties consistent with AGN, few of them possess characteristics of LMXBs and CVs. Our analysis puts constraints on population of X-ray sources with L_X>3×10^33 erg s^-1 in Draco
more » ... suggesting that there are no actively accreting BH and NS binaries. However, we find 4 sources that could be LMXBs/CVs in quiescent state associated with Draco. We also place constraints on the central black hole luminosity and on a dark matter decay signal around 3.5 keV.
doi:10.3847/0004-637x/821/1/54 fatcat:gtywtrvbmncmpceovpio42mwiq