Globular Clusters and X-Ray Point Sources in Centaurus A (NGC 5128)

@article{Woodley2008GlobularCA,
  title={Globular Clusters and X-Ray Point Sources in Centaurus A (NGC 5128)},
  author={Kristin A. Woodley and Somak Raychaudhury and Ralph P. Kraft and William E. Harris and Andr{\'e}s Jord{\'a}n and Katherine E. Whitaker and Christine Jones and William R. Forman and Stephen S. Murray McMaster University and Harvard University},
  journal={The Astrophysical Journal},
  year={2008},
  volume={682},
  pages={199-211}
}
We detect 353 X-ray point sources, mostly low-mass X-ray binaries (LMXBs), in four Chandra observations of Centaurus A (NGC 5128), the nearest giant early-type galaxy, and correlate this point-source population with the largest available ensemble of confirmed and likely globular clusters (GCs) associated with this galaxy. Of the X-ray sources, 31 are coincident with 30 GCs that are confirmed members of the galaxy by radial velocity measurement (two X-ray sources match one GC within our search… Expand
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References

SHOWING 1-10 OF 81 REFERENCES
The X-Ray Globular Cluster Population in NGC 1399
We report on the Chandra observations of the elliptical galaxy NGC 1399, concentrating on the X-ray sources identified with globular clusters (GCs). A large fraction of the 2-10 keV X-ray emission inExpand
Optical Counterparts of X-Ray Point Sources Observed by Chandra in NGC 5128: 20 New Globular Cluster X-Ray Sources*
Very Large Telescope images in BVI are used to identify the optical counterparts to bright Chandra X-ray points sources discovered by Kraft and coworkers. Of a total of 111 X-ray point sources withExpand
Chandra Observations of the X-Ray Point Source Population in Centaurus A
We present results from two Chandra X-ray Observatory observations of the X-ray point source population in the nearby radio galaxy Centaurus A (NGC 5128). Using a wavelet decomposition detectionExpand
Low-Mass X-Ray Binaries and Globular Clusters in Early-Type Galaxies
A high fraction of the low-mass X-ray binaries (LMXBs) in early-type galaxies are associated with globular clusters (GCs). Here we discuss the correlations between LMXBs and GCs in a sample of fourExpand
Low-Mass X-Ray Binaries in Six Elliptical Galaxies: Connection to Globular Clusters
We present a systematic study of the low-mass X-ray binary (LMXB) populations of six elliptical galaxies, aimed at investigating the detected LMXB-globular cluster (GC) connection. We utilize ChandraExpand
X-RAY POINT SOURCES IN THE SOMBRERO GALAXY: VERY SOFT SOURCES, THE GLOBULAR CLUSTER/LOW-MASS X-RAY BINARY CONNECTION, AND AN OVERVIEW
We report on the population of point sources discovered during an 18.5 ks Chandra ACIS-S observation of the Sombrero galaxy. We present the luminosity function and the spectra of the six brightestExpand
X-ray Point Sources in the Sombrero Galaxy: Supersoft Sources, the Globular Cluster/lmxb Connection, and an Overview
We report on the population of point sources discovered during an 18.5 ksec Chandra ACIS-S observation of the Sombrero Galaxy. We present the luminosity function, the spectra of the 6 brightestExpand
The low-mass X-ray binary-globular cluster connection in NGC 4472
We have analyzed the low-mass X-ray binary (LMXB) candidates in a Chandra observation of the giant elliptical galaxy NGC 4472. In a region observed by the Hubble Space Telescope (HST), approximatelyExpand
Low-Mass X-Ray Binaries and Globular Clusters in Centaurus A*
We present results of Hubble Space Telescope and Chandra X-Ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out ofExpand
Identification of X-ray point sources and a study of the nature of 62 X-ray globular cluster candidates in M31
This paper includes two parts. The first presents the spectral energy distributions (SEDs) of 49 globular cluster (GC) X-ray sources in 13 BATC (Beijing-Arizona-Taiwan-Connecticut) intermediate-bandExpand
...
1
2
3
4
5
...