Statistical distributions of speeds of coronal mass ejections

Vasyl Yurchyshyn, S. Yashiro, V. Abramenko, Haimin Wang, N. Gopalswamy

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

We studied the distribution of plane-of-sky speeds determined for 4315 coronal mass ejections (CMEs) detected by the Large Angle and Spectrometric Coronagraph Experiment on board the Solar and Heliospheric Observatory (SOHO LASCO). We found that the speed distributions for accelerating and decelerating events are nearly identical and to a good approximation they can be fitted with a single lognormal distribution. This finding implies that, statistically, there is no physical distinction between the accelerating and the decelerating events. The lognormal distribution of the CME speeds suggests. that the same driving mechanism of a nonlinear nature is acting in both slow and fast dynamical types of CMEs.

Original languageEnglish (US)
Pages (from-to)599-603
Number of pages5
JournalAstrophysical Journal
Volume619
Issue number1 I
DOIs
StatePublished - Jan 20 2005

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: corona
  • Sun: coronal mass ejections (CMEs)

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