SIMBAD references

2001MNRAS.326..349O - Mon. Not. R. Astron. Soc., 326, 349-357 (2001/September-1)

Radio flares and plasmon size in Cygnus X-3.

OGLEY R.N., BELL BURNELL S.J., SPENCER R.E., NEWELL S.J., STIRLING A.M. and FENDER R.P.

Abstract (from CDS):

We have observed a number of minor radio flares in Cyg X-3 using the MERLIN array. Photometric observations show the system to be highly active with multiple flares on hourly time-scales over the one month observing programme. Analysis of the power spectrum of the source show no persistent periodicities in these data, and no evidence of the 4.8-h orbital period. An upper limit of 15mJy can be placed on the amplitude of any sinusoidal variation of source flux at the orbital period. The brightness temperature of a flare is typically Tb≥109-1010K, with a number of small flares of 5-min duration having brightness temperatures of Tb≥fewx1011K. For such a change in flux to occur within a typical 10-min time-scale, the radiation must originate from plasmons with a size ≤1.22au. This emission is unlikely to originate close to the centre of the system as both the jets and compact object are buried deep within an optically thick stellar wind. Assuming a spherically symmetric wind, plasmons would become visible at distances ∼13au from the core.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): binaries: close - stars: individual: Cyg X-3 - stars: variables: other - stars: Wolf-Rayet - radio continuum: stars - X-rays: stars

Simbad objects: 6

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2019.10.14-04:16:54

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