Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250..155b&link_type=abstract
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 155-159.
Astronomy and Astrophysics
Astronomy
77
Astronomical Maps, Brightness Distribution, Flux Density, Galactic Nuclei, Milky Way Galaxy, Radio Sources (Astronomy), Angular Resolution, Antenna Arrays, High Resolution, Infrared Radiation, Radio Astronomy
Scientific paper
A 5 GHz map of the inner 1 x 1 arcmin of the galactic center made with the VLA is presented. The angular resolution of the map is 2 x 8 arcsec (alpha x delta). The radio map is very similar to the 10 micron maps of this region; in particular, nearly all of the thermal 10 micron peaks have corresponding peaks in the radio brightness distribution. It is found that the ratio of 10 micron flux density to radio flux density for these discrete regions is surprisingly high, 100-1000, a result which implies that the source of excitation is very soft (black-body) temperatures of about 25,000 K are indicated. The 5 GHz flux density of the point nonthermal source in Sgr A West has increased by a factor of approximately 2 in two years.
Brown Raymon L.
Johnston Ken J.
Lo Kwok Yung
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