Abstract
view Abstract Citations (95) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Structure and evolution of molecular clouds near H II regions. II. The disk constrained H II region, S 106. Bally, J. ; Scoville, N. Z. Abstract 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. Publication: The Astrophysical Journal Pub Date: April 1982 DOI: 10.1086/159850 Bibcode: 1982ApJ...255..497B Keywords: H Ii Regions; Hydrogen Ions; Molecular Clouds; Nebulae; Carbon Monoxide; Disks; Astrophysics full text sources ADS | data products SIMBAD (6)
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