Broad-wing molecular lines without internal energy sources

Details Broad-wing molecular lines without internal energy sources Broad-wing molecular lines without internal energy sources

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331l.127b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 331, Aug. 15, 1988, p. L127-L130. Research supported by the Alfre

Astronomy and Astrophysics

Astrophysics

30

Carbon Monoxide, Interstellar Gas, Molecular Clouds, Molecular Spectra, Spectral Line Width, Broadband, Emission Spectra, Energy Sources, Protostars

Scientific paper

The discovery of broad CO wings in four high-latitude molecular clouds which do not have associated internal energy sources is reported. The velocity width of the wings is as much as five times greater than the width of the cloud cores. Neither visible stars brighter than the background population, optical nebulosity, nor IRAS point sources are found at the position of the wings, except for one case with an IRAS source 3 arcmin from the peak position of the wings. The possibility that the wings are the result of conductive interfaces resulting from cold molecular clouds in a hotter ambient medium is examined, and it is concluded that the expected column density of such gas is more than three orders of magnitude smaller than that observed.

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