A new CO bipolar flow and dense disk system associated with the infrared reflection nebula GGD 27 IRS

Details A new CO bipolar flow and dense disk system associated with the infrared reflection nebula GGD 27 IRS A new CO bipolar flow and dense disk system associated with the infrared reflection nebula GGD 27 IRS

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..894y&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 894-900. Research supported by MOESC.

Astronomy and Astrophysics

Astronomy

47

Accretion Disks, Carbon Monoxide, Infrared Sources (Astronomy), Radio Jets (Astronomy), Reflection Nebulae, Doppler Effect, Molecular Spectra, Near Infrared Radiation, Stellar Winds

Scientific paper

Observations of the CO J = 1-0 and CS J = 2-1, 1-0 lines and 1.1 mm continuum emissions around an infrared reflection nebula GGD 27 IRS are presented. These observations revealed that this source is a prototypical molecular bipolar flow which shows shell structure and which is associated with a dense disk. The CO bipolar flow spatially coincides with the infrared reflection nebula, suggesting that the near-infrared light is scattered by the dust whose distribution is conducted by the flow. A spatial coincidence of the expected cavity of the molecular flow with the ionized gas is also noticed, which supports a stellar wind-driven model of the outflow. The density and the mass of the disk are deduced to be 1 x 10 to the 5th/cu cm and 120 solar masses, respectively, from an LVG model calculated for the two transitions of the CS molecule, and greater than 1.2 x 10 to the 5th/cu cm and 400 solar masses from the optical thickness of the cold dust at 1.1 mm.

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