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  • ASTROPHYSICS  (2)
  • LUNAR AND PLANETARY EXPLORATION  (1)
  • Life and Medical Sciences
  • 1980-1984  (3)
  • 1950-1954
  • 1981  (3)
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  • 1980-1984  (3)
  • 1950-1954
Year
  • 1
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    Infrared line and continuum views of G333.6-0.2 (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A 1-micron CCD picture and maps of the Ne II and Ar III fine-structure lines have been obtained in a region roughly one arcmin in size centered on the core of the compact H II region G333.6 - 0.2. The two emission-line maps show nearly identical intensity distributions, although much different fluxes. The maps are similar to the 1-micron picture smoothed to their angular resolutions. The infrared line of S IV also was detected and appears to have a spatial intensity distribution similar to that of the other fine-structure lines. The 1-micron picture reveals a small number of objects of nearly stellar appearance in the core, suggesting that G333.6 - 0.2 is powered by a compact cluster of sources. Stellar continuum radiation probably is responsible in part for the low equivalent width of the B-gamma line in the core.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 247
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The detection of HCN on Jupiter (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The detection of HCN on Jupiter is reported. Three R-branch lines of the nu-2 fundamental of HCN near 13.5 microns were observed in absorption, from which the HCN column density is inferred to be 0.005 cm-am with an uncertainty of a factor of two. If emission from the stratosphere exists, then the derived column density is only a lower limit. It is suggested that the Jovian HCN most likely originates from the photolysis of CH4 and NH3 in the lower stratosphere and upper troposphere. In addition, an upper limit of 0.025 cm-am was established for the column density of HCN on Saturn.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 48; Nov. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The abundances of neon, sulfur, and argon in planetary nebulae (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: New infrared observations of Ne II, Ar III, and S IV are used in optical observations of other ionization states of the considered elements to evaluate the abundances of neon, argon, and sulfur in 18 planetary nebulae. Attention is also given to one or more of the infrared lines in 18 other nebulae. It is pointed out that S IV was detected in approximately 90% of the observed objects, while Ar III was found in about 80%, and Ne II in roughly one-third. It is noted that optical observations typically include only a limited region of the nebula, while the infrared measurements frequently involve integration over the entire nebular image.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 249
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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