Atomic and molecular outflow in DR21

Details Atomic and molecular outflow in DR21 Atomic and molecular outflow in DR21

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9222244r&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Galactic Radiation, H Lines, Interstellar Matter, Molecular Clouds, Radio Jets (Astronomy), Hydrogen Clouds, Monatomic Gases, Red Shift, Star Formation

Scientific paper

Observations of the 21 cm H(0) line and of the J 3-2 transitions of HCO(+) in DR21 are presented. The H(0) observations reveal a massive (24 solar mass) jet which is red shifted by up to 90 km/s, with peak H(0) column density 2 times 10 to the 21st power/sq cm. This jet is three orders of magnitude more massive than the H(0) wind seen in HH7-11 and is capable of driving the molecular outflow in DR21 in a momentum conserving interaction. The molecular line observations show that the outflow in DR21 contains about 170 solar mass of dense material. They also reveal a second cloud core to the west of DR21 which appears to be associated with H(0) emission from shock dissociation of H2. A model is presented in which the H(0) jet is formed by recombination of an initially ionized outflow from DR21.

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