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Metric Radio Observations of the Evolution of a ``Halo'' Coronal Mass Ejection Close to the Sun

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dc.contributor.author Ramesh, R
dc.contributor.author Kathiravan, C
dc.contributor.author Sastry, Ch. V
dc.date.accessioned 2008-09-17T11:32:19Z
dc.date.available 2008-09-17T11:32:19Z
dc.date.issued 2003-07-10
dc.identifier.citation The Astrophysical Journal, Vol. 591, No. 2, pp. L163 - L166 en
dc.identifier.issn 0004-637X
dc.identifier.uri http://hdl.handle.net/2248/3697
dc.description.abstract We report direct imaging observations of the propagation of a diffuse thermal radio enhancement in close temporal and spatial association with a ``halo'' coronal mass ejection from the solar atmosphere, in the metric wavelength regime. The speed and acceleration of the latter in the low corona were estimated in an independent manner from the displacement of the associated radio features, and the average values are 1136+/-73 km s-1 and 157+/-121 m s-2, respectively. The brightness temperature and electron density of the enhancement were found to be ~1.92×105 K and 2.81×107 cm-3 at a distance of 2.7 Rsolar from the center of the Sun. We also computed the magnetic field strength of the enhancement at the above height, and the value is ~0.86 G. The mass of the radio enhancement increased by a factor of ~2 during our observing period en
dc.language.iso en en
dc.publisher The American Astronomical Society en
dc.relation.uri http://www.journals.uchicago.edu/doi/abs/10.1086/377162 en
dc.subject Sun: solar-terrestrial relations en
dc.subject Sun: activity en
dc.subject Sun: corona en
dc.subject Sun: radio radiation en
dc.title Metric Radio Observations of the Evolution of a ``Halo'' Coronal Mass Ejection Close to the Sun en
dc.type Article en

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