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Evidence for Highly Inhomogeneous mm-Wave Sources During the Impulsive Flare of May 9, 1991In this paper multiwavelength observations of an impulsive flare of May 9, 1991 are presented. This event was observed with the 48 GHz multibeam focal array used at the Itapetinga radio telescope, the microwave patrol telescopes at Bem and the BATSE high time resolution hard X-ray spectrometer on board CGRO. While spatially unresolved low sensitivity observations show two major impulsive peaks, the mm-wave observations with the ability of spatially high resolved tracking of the emission centroids suggest a primarily bipolar source configuration. For the first time two mm-wave sources with a spacing below the HPBW could be separated with the multibeam technique. The general features of the observations are explained as emission of partially trapped electrons. Furthermore we present evidence for highly inhomogeneous substructures within one of the two mm-wave sources for which the positional scatter of the emission center, within 2s, is less than 2".
Document ID
19990019556
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Hermann, R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Magun, A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kaufmann, P.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Correia, E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Costa, J. E. R.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Machado, M. E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Fishman, G.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Publication Information
Publication: Astronomy and Astrophysics
Publisher: Springer-Verlag
Volume: 317
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Other

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