The quiescent radio spectrum of SS 433

Details The quiescent radio spectrum of SS 433 The quiescent radio spectrum of SS 433

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241l..77s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 241, Oct. 15, 1980, p. L77-L81.

Astronomy and Astrophysics

Astronomy

23

Radio Astronomy, Radio Spectra, Stellar Radiation, Stellar Spectra, Emission Spectra, H Ii Regions, Radiant Flux Density, Stellar Winds

Scientific paper

Nearly simultaneous low- and high-radiofrequency observations of SS 433 on two epochs for which the source was relatively quiescent show that its nonthermal spectrum flattens and probably turns over near 0.3 GHz. Several physical mechanisms are examined as possible causes of the observed spectrum. The analysis makes it possible to rule out foreground absorption by the interstellar medium or an intervening H II region, but several other mechanisms intrinsic to the source are plausible. A map made at 160 MHz shows the source is essentially unresolved, indicating an angular diameter less than about 1 arcmin at that frequency.

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