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What can be Learned from X-Ray Spectroscopy Concerning Hot Gas in the Local Bubble and Charge Exchange ProcessesSolar wind charge exchange produces diffuse X-ray emission with a variable surface brightness comparable to that of the cosmic background. While the temporal variation of the charge exchange emission allows some separation of the components, there remains a great deal of uncertainty as to the zero level of both. Because the production mechanisms of the two components are considerably different, their spectra would provide critical diagnostics to the understanding of both. However, current X-ray observatories are very limited in both spectral resolution and sensitivity in the critical soft X-ray (less than 1.0 keV) energy range. Non-dispersive high-resolution spectrometers, such as the calorimeter proposed for the Spectrum Roentgen Gamma mission, will be extremely useful in distinguishing the cascade emission of charge exchange from the spectra of thermal bremsstrahlung cosmic plasmas.
Document ID
20080040770
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Snowden, Steven L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
October 15, 2007
Subject Category
Astronomy
Meeting Information
Meeting: From the Outer Heliosphere to the Local Bubble: Comparison of New Observations with Theory
Location: Berm
Country: Switzerland
Start Date: October 15, 2007
End Date: October 19, 2007
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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