Chandra X-Ray Observations of Low Mass X-Ray Binary Candidates in S0 Galaxies
Abstract
Chandra X-ray observations of nearby galaxies continue to resolve tens to hundreds of low-mass X-ray binaries (LMXBs) per galaxy. Ongoing studies have brought up issues with the behavior of this population of stellar corpses, in particular the connection between LMXBs and globular clusters (GCs) and the nature of the LMXB luminosity function (LF). We present 195 LMXB candidates detected from Chandra images of of three S0 galaxies, NGC1380, NGC2768, and NGC4477. 16 sources in NGC1380 were matched with globular clusters identified from the ACS Fornax Cluster Survey done by Hubble. We show that the results of spectral fitting and hardness ratio analysis indicate the population of LMXBs are consistent with Galactic absorption and a power-law X-ray spectrum. We discuss the asymmetric distribution of sources in NGC4477 and the new observation of NGC 1380-ULX1. We compare the population of LMXBs in the sample S0 galaxies to other populations in elliptical galaxies.
- Publication:
-
American Astronomical Society Meeting Abstracts #221
- Pub Date:
- January 2013
- Bibcode:
- 2013AAS...22114227H