High dispersion spectroscopy of quiescent prominences - II: Vertical structure of the line-of-sight velocity field

Lawrence William Ramsey

Research output: Contribution to journalArticlepeer-review

Abstract

A systematic study of the internal horizontal (line-of-sight) motions of quiescent prominences which were observed at the limb has been made by using fourier techniques to analyse the shift of the Ca ii K line as a function of height above the limb. The results indicate that a characteristic size for the velocity elements is present in ∼70% of the 13 prominences studied. This size of ∼4700 km is attributed to Alfvén waves induced by horizontal convective motions in the photosphere as previously suggested by Malville. The qualitative aspects of the observations are described by a simple model which is based on this hypothesis.

Original languageEnglish (US)
Pages (from-to)307-313
Number of pages7
JournalSolar Physics
Volume51
Issue number2
DOIs
StatePublished - Mar 1 1977

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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