Open AccessShocked molecular hydrogen in the bipolar outflow NGC 2071
Author(s) -
Michael Burton,
T. R. Geballe,
P. W. J. L. Brand
Publication year - 1989
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1093/mnras/238.4.1513
Subject(s) - physics , astrophysics , bipolar outflow , outflow , line (geometry) , emission spectrum , spectral line , excited state , free molecular flow , hydrogen , ionization , shock wave , molecular cloud , hydrogen molecule , full width at half maximum , luminosity , atomic physics , astronomy , galaxy , star formation , optics , mathematics , thermodynamics , stars , ion , quantum mechanics , geometry , meteorology
Maps of the emission from the v = 1-0 S(1) line of molecular hydrogen in the bipolar outflow of NGC 2071 are presented. The line emission is shown to peak at six positions distributed irregularly along two lobes which are parallel to, but offset about 20 arcsec from, the lobes of the high-velocity CO-line emission. The energetics and composition of the high-velocity gas support a model in which the driving agent is a bipolar atomic wind which arises from the vicinity of the central IR sources and shocks the surrounding molecular cloud, evacuating a cavity within it.
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