CCCP: Carina's diffuse X-ray emission (Townsley+, 2011)

Details CCCP: Carina's diffuse X-ray emission (Townsley+, 2011) CCCP: Carina's diffuse X-ray emission (Townsley+, 2011)

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..21940015t&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/194/15. Originally published in: 2011ApJS..194...15T

Physics

Abundances, X-Ray Sources, Interstellar Medium, Models

Scientific paper

We present a 1.42deg2^ mosaic of diffuse X-ray emission in the Great Nebula in Carina from the Chandra X-ray Observatory Advanced CCD Imaging Spectrometer camera. After removing >14000 X-ray point sources from the field, we smooth the remaining unresolved emission, tessellate it into segments of similar apparent surface brightness, and perform X-ray spectral fitting on those tessellates to infer the intrinsic properties of the X-ray-emitting plasma. By modeling faint resolved point sources, we estimate the contribution to the extended X-ray emission from unresolved point sources and show that the vast majority of Carina's unresolved X-ray emission is truly diffuse. Line-like correlated residuals in the X-ray spectral fits suggest that substantial X-ray emission is generated by charge exchange at the interfaces between Carina's hot, rarefied plasma and its many cold neutral pillars, ridges, and clumps.
(2 data files).

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