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The ISM From the Soft X-ray Background PerspectiveIn the past few years progress in understanding the local and Galactic ISM in terms of the diffuse X-ray background has been as much about what hasn't been seen as it has been about detections. High resolution spectra of the local SXRB have been observed, but are inconsistent with current thermal emission models. An excess over the extrapolation of the high-energy (most clearly visible at E greater than 1.5 keV) extragalactic power law down to 3/4 keV has been observed but only at the level consistent with cosmological models, implying the absence of at least a bright hot Galactic halo. A very recent FUSE result indicates that O VI emission from the Local Hot Bubble is insignificant, if it exists at all, a result which is also inconsistent with current thermal emission models. A short review of the current status of our (well, at least my) understanding of the Galactic SXRB and ISM is presented here.
Document ID
20030102157
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Snowden, S. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Astronomy
Meeting Information
Meeting: Soft X-ray Emissions from Clusters of Galaxies and Related Phenomena Meeting
Location: Huntsville, AL
Country: United States
Start Date: December 11, 2002
End Date: December 13, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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