H2CO and excited OH toward G 10.6-0.4 - Another rotating disk?

Details H2CO and excited OH toward G 10.6-0.4 - Another rotating disk? H2CO and excited OH toward G 10.6-0.4 - Another rotating disk?

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..189g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 189-202.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Spectroscopy, Formaldehyde, H Ii Regions, Hydroxyl Emission, Rotating Matter, Star Formation, Astronomical Maps, Line Spectra, Molecular Spectra, Radio Spectra

Scientific paper

The authors present high resolution (0arcsec.6) observations of the 6 cm and 2 cm lines of formaldehyde and of the 2Π1/2J = 1/2 F = 1 - 1 line of OH towards the ultracompact H II region G 10.6 - 0.4. The OH distribution presents significant differences from the H2CO. The overall picture emerging from the data suggests a fragmentation process in which part of the angular momentum is converted into orbital motions of the fragments. 6 cm formaldehyde absorption has also been detected in front of another less compact H II region located in the immediate vicinity of G 10.6 - 0.4. This absorption probably originates in the extended and massive (>104M_sun;.) molecular cloud surrounding the complex. This H II region has a "cometary" morphology suggestive of a bow shock.

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