AAS 201st Meeting, January, 2003
Session 54. Compact X-Ray Sources
Poster, Tuesday, January 7, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[54.14U] Globular Cluster X-Ray Sources and Supersoft Sources in NGC 4472 and M87

R. B. Friedman (Rutgers University), R. Di Stefano (Harvard-Smithsonian CfA/Tufts U), A.K.H. Kong, P. Barmby (Harvard-Smithsonian CfA), A. Kundu (Michigan State University)

We analyze two sets of archival Chandra observations of the giant elliptical galaxies NGC 4472 (M49) and NGC 4486 (M87) to identify point sources. We use this data, in combination with the results of optical observations to:

\begin{enumerate} \item Estimate the fraction of globular clusters (GCs) hosting low mass X-ray binaries (LMXBs), and the fraction of LMXBs in GCs.

\item Generate X-ray point source and globular cluster X-ray source luminosity functions.

\item Identify luminous supersoft X-ray sources (SSSs) and look for correlations with optical counterparts. \end{enumerate}

We identify a total of 211 X-ray sources in NGC 4472, and 55 sources in NGC 4486. Of the X-ray sources in NGC 4472, we find 20 or more significant associations with globular clusters. We also identify 25 SSS candidates in NGC 4472 and 3 in NGC 4486. The fraction of bright LMXBs in GCs is similar to the fraction that would be observed in M31 at Virgo distances.

This work was supported in part by NSF grant AST-9731923 to the SAO Summer Intern program.

The author(s) of this abstract have provided an email address for comments about the abstract: rbf18@physics.rutgers.edu

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