Refractive radio scintillation in the solar wind
Open Access
- 1 December 1989
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 241 (3) , 403-413
- https://doi.org/10.1093/mnras/241.3.403
Abstract
We have observed the strong radio source 3C279 with the Very Large Array radio interferometer when the source was at a solar elongation of |$0_.^\circ9$|. The visibilities were measured with a time resolution of 6.67 s. We find convincing evidence of slow variations in the flux, which we interpret as refractive scintillation caused by large-scale density inhomogeneities in the solar wind. Furthermore, we find that the angular size of the scatter-broadened image of 3C279 fluctuates in a correlated fashion with the flux. This effect, which had been predicted theoretically, is verified here for the first time.Keywords
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