Continuum observations of SGR A at mm/submm wavelengths

Details Continuum observations of SGR A at mm/submm wavelengths Continuum observations of SGR A at mm/submm wavelengths

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..337m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 337-348.

Astronomy and Astrophysics

Astronomy

100

Astronomical Spectroscopy, Infrared Astronomy, Millimeter Waves, Molecular Clouds, Radio Sources (Astronomy), Submillimeter Waves, Cosmic Dust, Emission Spectra, Optical Thickness, Stellar Mass, Stellar Winds, Supernova Remnants

Scientific paper

The source complex Sgr A has been mapped at wavelengths of 2.8 mm, 1.3 mm, and 350 mm. It is found that between 2 cm and 1.3 mm, the spectrum of Sgr A West is that of optically thin free-free emission. A dust ring is detected around the synchrotron shell source Sgr A East, whose eastern rim coincides with the region of highest hydrogen column density in the giant molecular cloud. It is suggested that the circumnuclear disk surrounding SGR A West is a transient feature, which was formed when the swept-up material of the dust shell interacted with the mass concentration of stars near the galactic center. The geometry of the source complex is described in detail.

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