Article (Scientific journals)
The Chandra Carina Complex Project: Deciphering the Enigma of Carina's Diffuse X-ray Emission
Townsley, Leisa K; Broos, Patrick S; Chu, You-Hua et al.
2011In Astrophysical Journal Supplement Series, 194, p. 15
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Keywords :
H II regions; stars: massive; stars: winds; outflows; X-rays: individual: Carina; X-rays: ISM; X-rays: stars
Abstract :
[en] We present a 1.42 deg[SUP]2[/SUP] 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 >14,000 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Townsley, Leisa K;  Department of Astronomy & Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
Broos, Patrick S;  Department of Astronomy & Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
Chu, You-Hua;  Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801, USA
Gagné, Marc;  Department of Geology and Astronomy, West Chester University, West Chester, PA 19383, USA
Garmire, Gordon P;  Department of Astronomy & Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
Gruendl, Robert A;  Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801, USA
Hamaguchi, Kenji;  CRESST and X-ray Astrophysics Laboratory NASA/GSFC, Greenbelt, MD 20771, USA ; Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
Mac Low, Mordecai*-Mark;  Department of Astrophysics, American Museum of Natural History, New York, NY 10024-5192, USA
Montmerle, Thierry;  Institut d'Astrophysique de Paris, 98bis, Bd Arago, 75014 Paris, France
Nazé, Yaël  ;  GAPHE, Département AGO, Université de Liège, Allée du 6 Août 17, Bat. B5C, B4000-Liège, Belgium
Oey, M. S.;  Department of Astronomy, University of Michigan, 830 Dennison Building, Ann Arbor, MI 48109-1042, USA
Park, Sangwook;  Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA
Petre, Robert;  Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Pittard, Julian M;  School of Physics and Astronomy, The University of Leeds, Leeds, UK
More authors (4 more) Less
Language :
English
Title :
The Chandra Carina Complex Project: Deciphering the Enigma of Carina's Diffuse X-ray Emission
Publication date :
01 May 2011
Journal title :
Astrophysical Journal Supplement Series
ISSN :
0067-0049
eISSN :
1538-4365
Publisher :
Univ Chicago Press, Chicago, United States - Illinois
Volume :
194
Pages :
15
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/1103.0764
Available on ORBi :
since 22 September 2011

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