X-ray sources in the bulge and inner disk of M31

Details X-ray sources in the bulge and inner disk of M31 X-ray sources in the bulge and inner disk of M31

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17109t&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present an analysis of the monitoring XMM and Chandra observations of the bulge and inner disk of M31 taken between 1999 and 2002. High sensitivity of the observations allows a detailed study of spectral and timing properties of the individual bright X-ray sources both transient and persistent. The transient systems demonstrate distinctly different types of X-ray variability and spectral characteristics ranging from Classical Nova-like supersoft source to a black hole candidate X-ray Nova with a hard spectrum. Several X-ray objects show significant variability between individual XMM and Chandra observations. We report on the detection of the spectral transitions in some of these sources. We study the group properties of the X-ray source populations of the bulge and the inner disk of M31 and compare them to the properties of the X-ray source populations in the corresponding regions of our Galaxy and other neighboring normal galaxies.

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