Solar Physics

, Volume 141, Issue 1, pp 165–180 | Cite as

VLA and Trieste observations of type I storms, type IV and pulsations

  • P. Zlobec
  • M. Messerotti
  • G. A. Dulk
  • T. Kucera


A prime objective of this experiment was to determine whether type I or IV sources at 333 MHz contain features of small (arc sec) scale. With the VLA, our resolution was better than 4″. However, we never observed any structure of size smaller than about 30″, with the typical source sizes being between about 40″ and 90″.

Many observations were simultaneous with the Trieste Astronomical Observatory records at 327 MHz. The observations were made on two days in November 1988. On 8 November the observations were of a type I storm about two hours after a major flare. On 14 November they were mostly of the main phase of a type IV event, including pulsations of a kind rarely seen, strongly circularly polarized, and having a well-defined period of about 12 s. The size of the pulsating source was about 40″ by 60″, and the brightness temperature was about 109 K. We compare these pulsations with those observed earlier.


Flare Prime Objective Main Phase Brightness Temperature Astronomical Observatory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • P. Zlobec
    • 1
  • M. Messerotti
    • 1
  • G. A. Dulk
    • 2
  • T. Kucera
    • 2
  1. 1.Osservatorio Astronomico di TriesteItaly
  2. 2.Department of AstrophysicalPlanetary and Atmospheric Sciences University of ColoradoBoulderU.S.A.

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