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Title:
Voyager Observations of the Diffuse Far-ultraviolet Radiation Field
Authors:
Murthy, Jayant; Conn Henry, Richard; Holberg, Jay B.
Affiliation:
AA(Indian Institute of Astrophysics, Bengalooru 560 034, India ), AB(Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA ), AC(Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA)
Publication:
The Astrophysical Journal Supplement, Volume 199, Issue 1, article id. 11, 6 pp. (2012). (ApJS Homepage)
Publication Date:
03/2012
Origin:
IOP
Astronomy Keywords:
surveys, ultraviolet: ISM
DOI:
10.1088/0067-0049/199/1/11
Bibliographic Code:
2012ApJS..199...11M

Abstract

The two Voyager spacecraft have completed their planetary exploration mission and are now probing the outer realms of the heliosphere. The Voyager ultraviolet spectrometers continued to operate well after the Voyager 2 Neptune encounter in 1989. We present a complete database of diffuse radiation observations made by both Voyagers: a total of 1943 spectra (500-1600 Å) scattered throughout the sky. These include observations of dust-scattered starlight, emission lines from the hot interstellar medium, and a number of locations where no diffuse radiation was detected, with the very low upper limit of about 25 photons cm-2 s-1 sr-1 Å-1. Many of these observations were from late in the mission when there was significantly less contribution from interplanetary emission lines and thus less contamination of the interstellar signal.
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