Compact radio sources in the galactic center region

Details Compact radio sources in the galactic center region Compact radio sources in the galactic center region

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26as...35....1d&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 35, Jan. 1979, p. 1-22.

Astronomy and Astrophysics

Astronomy

101

Galactic Nuclei, Milky Way Galaxy, Radio Interferometers, Radio Sources (Astronomy), Astronomical Maps, Diffraction Patterns, Electron Energy, H Ii Regions, Ion Beams, Ion Emission, Radiant Flux Density, Radio Spectra, Supernova Remnants

Scientific paper

This paper presents data on 74 compact radio continuum sources in the galactic center region, detected at 5 GHz with the Westerbork Synthesis Radio Telescope, together with information on the associated extended components measured at 4.875 and 10.7 GHz with the Bonn 100-m telescope. With the exception of Sgr B2, the flux in the compact sources is only a small percentage of that in the extended components. There is an unusual concentration of compact sources near l 0.2 deg, which in general do not coincide with the ridge of the well-known spur or arc component seen on single-dish maps. The component MD5 in Sgr B2 has a turn-over frequency no less than 8 GHz and is one of the densest HII regions in the Galaxy. A previously unrecognized shell source, G359.1-0.5, may be a supernova remnant. Supplementary observations at Westerbork provide a limit of 10 Jy for the flux density of Sgr A West at 610 MHz, which confirms that the electron temperature of the HII region surrounding the galactic nucleus is not out of the ordinary.

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