Abstract
view Abstract Citations (23) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The gas density and distribution within 2 parsecs of the galactic center. Brown, R. L. ; Johnston, K. J. Abstract The galactic center was mapped with the VLA using a configuration optimized to emphasize low surface brightness features. It is found that the emission within 50 arcsec of the galactic center is a superposition of thermal and nonthermal radiation. In broad outline both the nonthermal source and the smaller region of extended thermal emission have the same morphology: they appear elliptical with their major axes aligned along b = 2.77 arcmin and with their centroids at or very near the position of the compact radio source Sgr A(asterisk). In addition, dense clumps of thermal emission appear to define a spiral-like pattern which also has its center of symmetry within 2 arcsec of Sgr A(asterisk). The gradients in gas density, synchrotron emissivity, and velocity dispersion outward from Sgr A(asterisk) suggest that a transient phenomenon is being viewed, such as an inflating supernova remnant, whose age is 7500-22,000 years. Publication: The Astrophysical Journal Pub Date: May 1983 DOI: 10.1086/184034 Bibcode: 1983ApJ...268L..85B Keywords: Galactic Nuclei; Gas Density; Interstellar Gas; Mass Distribution; Milky Way Galaxy; Astronomical Maps; Interferometry; Nonthermal Radiation; Radio Emission; Thermal Emission; Astrophysics full text sources ADS | data products SIMBAD (2)
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