1300 micron continuum observations of the Sagittarius B2 molecular cloud core

Details 1300 micron continuum observations of the Sagittarius B2 molecular cloud core 1300 micron continuum observations of the Sagittarius B2 molecular cloud core

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313l...5g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. L5-L9. NSF-supported research

Astronomy and Astrophysics

Astronomy

44

Continuous Spectra, Emission Spectra, Infrared Astronomy, Interstellar Gas, Molecular Clouds, Angular Resolution, Cosmic Dust, Interstellar Masers, Radio Astronomy

Scientific paper

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.

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