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
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