NDLI: The diffuse extreme ultraviolet background

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The diffuse extreme ultraviolet background

Content Provider	NASA Technical Reports Server (NTRS)
Author	Slavin, Jonathan Vallerga, John
Copyright Year	1996
Description	Observations of the diffuse EUV background towards 138 different directions using the spectrometers aboard the Extreme Ultraviolet Explorer satellite (EUVE) have been combined into a spectrum from 150A to 730A and represent an effective exposure of 18 million seconds. There is no significant evidence of any non-local line flux in the resultant spectrum such as that from a hot coronal plasma. These results are inconsistent with the Wisconsin C and B broad-band surveys assuming the source is a logT = 5.8 - 6.1 hot plasma in ionization equilibrium with solar abundances, confirming the previous result of Jelinksy, Vallerga and Edelstein) (hereafter Paper 1) using an observation along the ecliptic with the same instrument. To make these results consistent with the previous broad-band surveys, the plasma responsible for the emission must either be depleted in Fe by a factor of approximately 6, be behind an absorbing slab of neutral H with a column of 2 x 10(exp 19)/sq cm, or not be in collisional ionization equilibrium (CIE). One such non-CIE model (Breitswerdt and Schmutzier) that explains the soft x-ray results is also inconsistent with this EUV data.
File Size	214530
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19970025241
Archival Resource Key	ark:/13960/t8hf2s139
Language	English
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Geophysics High Temperature Plasmas Extreme Ultraviolet Explorer Satellite Abundance Exposure Surveys Coronas Ultraviolet Radiation X Rays Emission Spectra Ionization Ecliptic Plasma Radiation Extreme Ultraviolet Radiation Background Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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