NDLI: Airborne 20-65 micron spectrophotometry of comet halley

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Airborne 20-65 micron spectrophotometry of comet halley

Content Provider	NASA Technical Reports Server (NTRS)
Author	Moseley, S. H. Loewenstein, R. F. Glaccum, William Campins, Humberto C.
Copyright Year	1988
Description	Observations of Comet Halley with a grating spectrometer on board the Kuiper Airborne Observatory on four nights in Dec. 1985 to Apr. 1986 are reported. Low resolution 20 to 65 micrometer spectra of the nucleus with a 40 arcsec FWHM beam was obtained on 17 Dec. 1985, and on 15 and 17 Apr. 1986. On 20 Dec. 1985, only a 20 to 35 micrometer spectrum was obtained. Most of the data have been discussed in a paper where the continuum was dealt with. In that paper, models were fit to the continuum that showed that more micron sized particles of grain similar to amorphous carbon were needed to fit the spectrum than were allowed by the Vega SP-2 mass distribution, or that a fraction of the grains had to be made out of a material whose absorption efficiency fell steeper than lambda sup -1 for lambda greater than 20 micrometers. Spectra was also presented taken at several points on the coma on 15 Apr. which showed that the overall shape to the spectrum is the same in the coma. Tabulated values of the data and calibration curves are available. The spectral features are discussed.
File Size	122899
Page Count	3
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890003983
Archival Resource Key	ark:/13960/t28963f5p
Language	English
Publisher Date	1988-09-01
Access Restriction	Open
Subject Keyword	Astronomy Grain Size Cosmic Dust Comet Nuclei Emission Spectra Spectrum Analysis Continuums Gratings Spectra Halley's Comet Spectrophotometry Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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