Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..84..143p&link_type=abstract
Astrophysics and Space Science, vol. 84, no. 1, May 1982, p. 143-153.
Astronomy and Astrophysics
Astronomy
Centimeter Waves, Radio Astronomy, Radio Sources (Astronomy), Radio Spectra, Brightness Distribution, Electron Density (Concentration), H Ii Regions, High Resolution, Milky Way Galaxy, Radiant Flux Density, Radio Telescopes
Scientific paper
Sgr-B2, a radio source, has been studied at wavelengths of 13, 8.2, 3.9, 2.08 and 1.38 cm. The spectra of individual components are defined, and the total spectrum of the object is revised, by means of the brightness distributions obtained. The source is found to contain not less than four ultracompact details whose electron densities are greater than 20,000/cu cm, as well as an extended nuclear region detail with a 1.38-cm flux density of 12.2 f.u. and 58-arcsec angular size. All compact detail excitation parameters correspond to stars of spectral type earlier than O6. A nearly linear slope of -1.2 is found upon construction of a (log N(e)-log d) relation for all H II regions in the field around Sgr-B2.
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