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Title:
The 1983 September radio outburst of Cygnus X-3 - Relativistic expansion at 0.35c
Authors:
Spencer, R. E.; Swinney, R. W.; Johnston, K. J.; Hjellming, R. M.
Affiliation:
AA(Manchester, Victoria University, England), AB(Manchester, Victoria University, England), AC(E. O. Hulburt Center for Space Research, Washington, DC), AD(National Radio Astronomy Observatory, Socorro, NM)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 15, 1986, p. 694-699. (ApJ Homepage)
Publication Date:
10/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
RADIO SOURCES (ASTRONOMY), STELLAR RADIATION, X RAY BINARIES, ANGULAR RESOLUTION, RADIANT FLUX DENSITY, VISIBILITY
DOI:
10.1086/164637
Bibliographic Code:
1986ApJ...309..694S

Abstract

MERLIN and VLA observations of Cygnus X-3 during 1983 September and October are reported. The radio emission consisted of several intense flares occurring on October 1.3, 2.8, 8.6, and 10.8. The structure of the resulting emission at 6 cm was found to be unresolved until October 5. The size of the structure increased linearly from less than 20 mas on October 8 to an unresolved uniform double with a separation of 75 mas on October 15. The data is consistent with an expansion or separation at a rate of 4.6-18 mas per day depending on which flare was associated with the expansion. A rate of 12 mas per day is favored.

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