1300 micron continuum observations of the Sagittarius B2 molecular cloud core

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184821· OSTI ID:6405566

Goldsmith, P F; Snell, R L; Lis, D C

Observations with 23-arcsec angular resolution are obtained of the continuum emission at 1300 microns wavelength from the central region of the Sgr B2 molecular cloud, which contains the north and middle high-mass star-forming regions and associated radio continuum and maser sources. The spatial resolution of the present data shows that the 1300-micron continuum emission peak is located at Sgr B2(N), in contrast to the midinfrared emission, which is centered on Sgr B2(M). Comparison with 53 micron data having comparable angular resolution suggests that there is optically thick foreground dust which prevents detection of Sgr B2(N) at wavelengths not greater than 100 microns. Within the about 1.5 x 3.5 pc region mapped, the total mass is 500,000 solar masses and the mean H2 density is 300,000/cu cm, somewhat larger than found in previous investigations. 27 references.

• Research Organization: Five College Radio Astronomy Observatory, Amherst, MA
• OSTI ID: 6405566
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 313; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
COSMIC DUST
COSMIC GASES
DENSITY
DUSTS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
EQUIPMENT
FLUIDS
GASES
INTERSTELLAR SPACE
MASERS
MASS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MOLECULES
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA