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Non-Local Origin of a Substantial Portion of the Soft X-Ray Background

Published online by Cambridge University Press:  12 April 2016

George W. Clark
George W. Clark*
Affiliation:
Center for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Extract

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Comparison of the SAS-3 soft X-ray sky survey (F. Marshall and G. Clark 1984) with the 21-cm neutral hydrogen survey of Stark et al. (1984) confirms the well-known anticorrelation between the counting rates in the C-band (0.10-0.28 keV) and the column density of neutral hydrogen, and demonstrates that this anticorrelation is significant on all angular scales ranging from that of the general trend from the galactic equator to the poles down to the angular resolution of the detector (2°.7 FWHM). Included in this general anticorrelation are numerous instances of what appear to be soft X-ray “shadows” of nearby (100-300 pc) 21-cm features, and several bright X-ray regions coincident with “holes” in the ISM.

Type
Hot Gas in the LISM: Soft X-Ray Observations
Information
International Astronomical Union Colloquium , Volume 81: Local Interstellar Medium , 1984 , pp. 204 - 210
Copyright
Copyright © NASA 1984

References

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