Interaction between a massive molecular outflow and dense gas associated with IRAS 22142+5206

Details Interaction between a massive molecular outflow and dense gas associated with IRAS 22142+5206 Interaction between a massive molecular outflow and dense gas associated with IRAS 22142+5206

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aj....115..777d&link_type=abstract

Astronomical Journal, vol. 115, p. 777

Astronomy and Astrophysics

Astronomy

7

Infrared Astronomy Satellite, Infrared Radiation, Interstellar Matter, Star Formation, Molecular Flow, Gas Density, Gas Flow, Angular Resolution, Protostars

Scientific paper

We report results of (C-12)O, (C-13)O, and (C-18)O (J = 1 0) observations made toward the luminous protostellar candidate IRAS 22142+5206 using the 45 m telescope at Nobeyama Radio Observatory. We have discovered a massive CO outflow with a molecular mass of 33 M, which is among the more massive outflows reported to date. The outflow lobes extend to over 2 pc from the IRAS source. Dense gas with an elliptical shape is also found around the source, with a velocity gradient of 0.5 km/s/pc along its major axis. We find a cavity in the dense gas at positions where the CO outflow is prominent. We discuss the origin of the cavity, estimating the mechanical momentum and kinetic energy of the outflow, and conclude that the cavity was most likely created by the high-velocity jet of the outflow, which may have swept up part of the dense gas. We also carried out extensive 13CO observations toward the IRAS source using the Nagoya 4 m telescope in order to reveal the overall distribution of molecular gas around the source. The results of these observations indicate that the IRAS source is embedded in a molecular cloud with a mass of 7300 M(solar).

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