The Sagittarius B2 star-forming region - Subarcsecond radio spectral line and continuum observations

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168492· OSTI ID:6851466

Gaume, R A; Claussen, M J ^[1]

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1. E. O. Hulburt Center for Space Research, Washington, DC (USA)

Results are reported of a subarcsecond spatial resolution RF line and continuum study of the Sgr B2 region, observed at the frequency of the 76-alpha hydrogen recombination line and at the (J,K = 3,2) transition of NH3. Also reported are new observations of the ground-state OH main line masers toward Sgr B2 in both left and right circular polarization. The continuum images showed no less than 19 separate H II regions in the Sgr B2 complex. Ammonia emission was observed in the Sgr B2 K and F regions. The emission toward K was found near the K1, K2, and K3 regions. The NH3 emission and absorption toward the F region, along with the OH maser emission, delineate a rotating disk or torus of molecular material surrounding the Sgr B2 F complex of H II regions. The mass interior to the NH3 and OH emission regions was calculated to be on the order of 1400 solar masses. 38 refs.

• OSTI ID: 6851466
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 351; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMMONIA
AMPLIFIERS
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
GASES
H2 REGIONS
HYDRIDES
HYDROGEN COMPOUNDS
IMAGES
INTERSTELLAR SPACE
MASERS
MASS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MORPHOLOGY
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
RADIATIONS
RADIOWAVE RADIATION
SPACE
STAR EVOLUTION