Other
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255..497b&link_type=abstract
Astrophysical Journal, Part 1, vol. 255, Apr. 15, 1982, p. 497-509.
Other
80
H Ii Regions, Hydrogen Ions, Molecular Clouds, Nebulae, Carbon Monoxide, Disks
Scientific paper
Observations of the molecular gas surrounding the biconical H II region S106 reveal a disk of about 100 solar masses constraining the development of the ionized region. Two CO peaks are seen in the equatorial plane of the biconical nebula on opposite sides of a near infrared source thought to be the exciting star for the H II region. Although no systematic velocity gradient is seen for the cloud as a whole, there is a small velocity shift of about 2 km/s in the CO emission from the two peaks. A model is developed for S106 with a B0 exciting star situated in a dense neutral disk, which dominates the dynamics of the nebula. Isothermal expansion of freshly ionized material from the disk drives a supersonic flow of plasma which supplies gas to the two lobes of the H II region.
Bally John
Scoville Nicholas Z.
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