Atomic hydrogen associated with the high-velocity flow in NGC 2071

Details Atomic hydrogen associated with the high-velocity flow in NGC 2071 Atomic hydrogen associated with the high-velocity flow in NGC 2071

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266l..61b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 266, Mar. 1, 1983, p. L61-L64.

Astronomy and Astrophysics

Astronomy

51

Hydrogen Atoms, Molecular Flow, Orion Nebula, Radio Astronomy, Stellar Evolution, Carbon Monoxide, Centimeter Waves, Radio Interferometers

Scientific paper

The first detection of 21 cm atomic hydrogen emission from a star-forming region exhibiting energetic molecular outflow is reported. Observing with the VLA, a 120 km/sec wide H I line is found formed within a 0.1 pc radius of a cluster of moderate luminosity infrared stars associated with the bipolar outflow in NGC 2071. The column density of high-velocity atomic hydrogen is 8 x 10 to the 20th/sq cm, a total of 0.1 solar mass of H I. The high-velocity atomic gas may either be formed by the dissociation of H2 behind the shock that is responsible for the broad 2.12 micron H2 emission line in this source or the result of H2 having been photodissociated by the UV radiation field of the embedded, recently formed stars.

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