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Low intensity H-beta emission from the interstellar mediumA search for diffuse galactic H beta emission not associated with any known H II regions was conducted using a 2-inch-diamenter pressure-scanned Fabry-Perot spectrometer at the Coude focus of a 36-inch telescope. Observations were made near the directions of four pulsars. Emissions with intensities from 40,000 to 400,000 photons/sq cm sec ster (corresponding to emission measures of approximately 10 - 100) were detected in three of the directions. The data indicate an average ionization rate (assuming steady state) of approximately 10 to the minus 14th power/H-atom sec for the interstellar hydrogen in these directions and temperatures between 1000 and 10,000 K for the emitting regions. Plans were made to continue the investigation of these very faint hydrogen emission sources using a 6-inch-diameter Fabry-Perot spectrometer.
Document ID
19720004123
Document Type
Conference Paper
Authors
Reynolds, R. J. (Wisconsin Univ. Madison, WI, United States)
Roesler, F. (Wisconsin Univ. Madison, WI, United States)
Scherb, F. (Wisconsin Univ. Madison, WI, United States)
Boldt, E. A. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 6, 2013
Publication Date
September 1, 1971
Publication Information
Publication: NASA. Goddard Space Flight Center The Gum Nebula and Related Probl.
Subject Category
SPACE SCIENCES
Funding Number(s)
CONTRACT_GRANT: NGL-50-002-044
CONTRACT_GRANT: NGL-50-002-162
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19720004101Analytic PrimaryThe Gum nebula and related problems