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Title:
Three new 'nonterrestrial' molecules
Authors:
Thaddeus, P.; Guelin, M.; Linke, R. A.
Affiliation:
AA(NASA, Goddard Institute for Space Studies, New York, N.Y.), AB(NASA, Goddard Institute for Space Studies, New York, N.Y; Paris, Observatoire, Meudon, Hauts-de-Seine, France), AC(Bell Telephone Laboratories, Inc., Holmdel, N.J.)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 246, May 15, 1981, p. L41-L45. (ApJL Homepage)
Publication Date:
05/1981
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
INTERSTELLAR CHEMISTRY, INTERSTELLAR MATTER, MOLECULAR SPECTRA, POSITIVE IONS, CYANO COMPOUNDS, LINE SPECTRA, MICROWAVE SPECTRA, RADIAL VELOCITY, SULFUR COMPOUNDS
Comment:
A&AA ID. AAA029.131.222
DOI:
10.1086/183549
Bibliographic Code:
1981ApJ...246L..41T

Abstract

Eight new interstellar lines have been detected from three molecules not previously observed spectroscopically in space or in the laboratory. One is a linear or nearly linear molecule with microwave constants B0 equals 21,337.15 plus or minus 0.06 MHz, D0 equals 21.4 plus or minus 1.5 kHz. This is the thioformyl ion HCS(plus), first identified because B0 and D0 are close to those calculated, and now confirmed by laboratory detection of one of the present lines (Gudeman et al.). The second molecule, also linear or nearly so, has microwave constants B0 equals 10,691,406 plus or minus 0.043 MHz, D0 equals 1.84 plus or minus 0.91 kHz close to those expected for the isoelectronic systems HOCO(plus) and HOCN; a choice between the two cannot be made on the basis of the available astronomical data. The existence of a third molecule is deduced from an unidentified line at 85,338 MHz that has been found in many sources, is fairly intense in several, and may be self-absorbed in Sgr B2.

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