Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283..273t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 1, 1984, p. 273-278. Research supported by the Natural Sciences a
Astronomy and Astrophysics
Astrophysics
95
Binary Stars, Radio Stars, Stellar Models, Electron Energy, Radiant Flux Density, Radio Bursts, Radio Spectra, Stellar Magnetic Fields, Stellar Mass Accretion, Stellar Structure, Synchrotron Radiation
Scientific paper
A campaign of simultaneous, two-frequency radio observations at 5 and 10.5 GHz was carried out on the binary system LSI +61 deg 303 in August-September 1981 to obtain data on the physical configuration of the source. The flux densities and the spectral indices are proved for both frequencies. A radio period close to 26.5 days was detected, with its evolution proceeding at a rate of 0.06 days/yr. Analyses demonstrate that the observed radio spectra and flux density decay can be fitted with a model of an expanding synchrotron source and a power-law electron energy distribution. The radio signals can arise from luminosity-driven shocks originating in the supercritical accretion at periastron in an orbit with 0.75 eccentricity. Further observations are specified for confirming the model.
Gregory Philip C.
Taylor Russ A.
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