Does a solar filament barb always correspond to a prominence foot?
arXiv:2003.11976 · doi:10.3847/1538-4357/ab83f9
Abstract
Solar filaments are dark structures on the solar disk, with an elongated spine and several barbs extending out from the spine. When appearing above the solar limb, a filament is called a prominence, with several feet extending down to the solar surface. It was generally thought that filament barbs are simply the prominence feet veering away from the spine and down to the solar surface. However, it was recently noticed that there might be another dynamic type of barbs, which were proposed to be due to filament thread longitudinal oscillation. If this is the case, the dynamic barbs would not extend down to the solar surface. With the quadrature observations of a filament barb on 2011 June 5 from the {\it Solar Dynamics Observatory} and the {\it STEREO} satellites, we confirm that the filament barb is due to filament thread longitudinal oscillations. Viewed from the side, the filament barb looks like an appendix along the spine of the prominence, and does not extend down to the solar surface as a foot.
arXiv comment12 pages, 3 figures, accepted for publication in ApJ
References in corpus (24)
- Physics of Solar Prominences: II - Magnetic Structure and Dynamics
- Imaging and Spectroscopic Observations of a Filament Channel and the Implications for the Nature of Counter-streamings
- How can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud ?
- Chirality and Magnetic Configurations of Solar Filaments
- Modelling the Global Solar Corona: Filament Chirality Observations and Surface Simulations
- Simultaneous Transverse Oscillations of a Prominence and a Filament and Longitudinal Oscillation of another Filament Induced by a Single Shock Wave
- Observation and Simulation of Longitudinal Oscillations of an Active Region Prominence
- Observations and Implications of Large-Amplitude Longitudinal Oscillations in a Solar Filament
- SOHO/SUMER Observations of Prominence Oscillation Before Eruption
- Large amplitude oscillatory motion along a solar filament
- Three-dimensional MHD Simulations of Solar Prominence Oscillations in a Magnetic Flux Rope
- Propagating Waves Transverse to the Magnetic Field in a Solar Prominence
- Simultaneous transverse and longitudinal oscillations in a quiescent prominence triggered by a coronal jet
- Statistical Analysis of Filament Features Based on the Hα Solar Images from 1988 to 2013 by Computer Automated Detection Method
- Double-Decker Filament Configuration Revealed by Mass Motions
- Solar Filament Longitudinal Oscillations along a Magnetic Field Tube with Two Dips
- Statistical Study of the Magnetic Field Orientation in Solar Filaments
- Damping Mechanisms of the Solar Filament Longitudinal Oscillations in Weak Magnetic Field
- Fine-scale structures and material flows of quiescent filaments observed by New Vacuum Solar Telescope
- Dynamics of a prominence-horn structure during its evaporation in the solar corona
- 3D numerical simulations of oscillations in solar prominences
- Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption
- Hemispheric Preference and Cyclic Variation of Solar Filament Chirality from 2000 to 2016
- Damped large amplitude oscillations in a solar prominence and a bundle of coronal loops
Cited by in corpus (5)
- Some interesting topics provoked by the solar filament research in the past decade
- Prominence fine structures in weakly twisted and highly twisted magnetic flux ropes
- Measuring three-dimensional shapes of stable solar prominences using stereoscopic observations from SDO and STEREO
- Modelling the magnetic structure of a large-scale horse-shoe-like filament in a decaying and diffuse active region
- Formation and Characteristics of Filament Threads in Double-Dipped Magnetic Flux Tubes