Periodic Motion along a Solar Filament Initiated by a Subflare

Details Periodic Motion along a Solar Filament Initiated by a Subflare Periodic Motion along a Solar Filament Initiated by a Subflare

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...584l.103j&link_type=abstract

The Astrophysical Journal, Volume 584, Issue 2, pp. L103-L106.

Astronomy and Astrophysics

Astronomy

28

Sun: Corona, Sun: Filaments, Sun: Oscillations, Sun: Prominences

Scientific paper

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.

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