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High angular resolution far-infrared observations of Sagittarius B2

1992; IOP Publishing; Volume: 389; Linguagem: Inglês

10.1086/171208

1538-4357

P. F. Goldsmith, D. C. Lis, D. F. Lester, P. M. Harvey,

Astrophysical Phenomena and Observations

view Abstract Citations (43) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High Angular Resolution Far-Infrared Observations of Sagittarius B2 Goldsmith, Paul F. ; Lis, Dariusz C. ; Lester, D. F. ; Harvey, P. M. Abstract High-angular-resolution FIR observations of the continuum emission from the Sagittarius B2 molecular cloud core are reported. Evidence is found for a significantly spatially extended component of the FIR emission at 50- and 100-micron wavelength, which has an angular extent of 1 x 2 arcmin. Its approximate spatial coincidence with a low-level extended component of the radio free-free emission and with the portion of the SGR B2 core having densities not less than 10 exp 5 cu cm derived from molecular observations suggests that the ionizing radiation from the massive stars in the compact sources is diffusing through a region with a beam-averaged visual extinction not less than a few hundred mag. It is inferred that the gas and the dust in the central portion of the cloud surrounding the compact radio free-free/FIR sources are highly clumped. Publication: The Astrophysical Journal Pub Date: April 1992 DOI: 10.1086/171208 Bibcode: 1992ApJ...389..338G Keywords: Far Infrared Radiation; Infrared Astronomy; Infrared Sources (Astronomy); Molecular Clouds; Angular Resolution; Astronomical Maps; Maximum Entropy Method; Astrophysics; ISM: INDIVIDUAL NAME: SAGITTARIUS B2; ISM: MOLECULES full text sources ADS | data products SIMBAD (4)