Periodic motion along a solar filament initiated by a subflare

Ju Jing, Jeongwoo Lee, Thomas J. Spirock, Yan Xu, Haimin Wang, G. S. Choe

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Abstract

A type of mass motion in solar filaments, not previously reported, is studied with high-cadence (1 minute) Hα observations made at the Big Bear Solar Observatory on 2001 October 24. This oscillatory motion is along the filament and extends over a long distance (∼1.4 × 105 km) with a period of ∼80 minutes and a very high velocity amplitude of ∼92 km s-1. Another significant property of this oscillation is that it is triggered by a subflare that occurred near its footpoint. The oscillation completes three cycles before it damps out over a timescale of ∼210 minutes. We mainly discuss whether this oscillation is an extreme form of the recently discovered counterstreaming flows in filaments or is a form of the large-amplitude filament oscillations (known as a "winking" filament) discovered a half-century ago.

Original languageEnglish (US)
Pages (from-to)L103-L106
JournalAstrophysical Journal
Volume584
Issue number2 II
DOIs
StatePublished - Feb 20 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: corona
  • Sun: filaments
  • Sun: oscillations
  • Sun: prominences

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