High angular resolution submillimeter observations of Sagittarius B2

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

DOI:https://doi.org/10.1086/168372· OSTI ID:6851533

Goldsmith, P F; Lis, D C; Hills, R; Lasenby, J ^[1]

---

1. Five College Radio Astronomy Observatory, Amherst, MA (USA) Mullard Radio Astronomy Observatory, Cambridge (England)

Continuum observations of the Sgr B2 molecular cloud have been carried out. The data offer the first detailed description of the submillimeter radiation from this complex source. The emission is dominated by the middle and northern compact sources, but the far-infrared radiation associated with the Northeast H II region L and from the southern H II region/molecular maser source H have been detected for the first time. The data, together with existing infrared measurements, indicate that the optical depth within Sgr B2(N) is significantly greater than that of Sgr B2(M) and that it has a noticeable effect for lambda = 800 microns or less. The envelope of Sgr B2(M) becomes optically thick for the radiation from Sgr B2(N), located within it, for wavelengths 100 microns or less. From radiative transfer modeling, a luminosity of 10 million solar is obtained for the middle source and 2 million solar for the northern source. 30 refs.

• OSTI ID: 6851533
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 350; 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
AMPLIFIERS
ASTRONOMY
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
GALAXY NUCLEI
GASES
H2 REGIONS
INFRARED RADIATION
INTERSTELLAR SPACE
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MOLECULES
RADIATION TRANSPORT
RADIATIONS
RADIOASTRONOMY
RESOLUTION
SPACE