E-Print Archive

There are 4507 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
Oscillation of a small Hα surge in a solar polar coronal hole View all abstracts by submitter

Valery Nakariakov   Submitted: 2019-06-10 03:17

Hα surges(i.e., cool/dense collimated plasma ejections) may act as a guide for the propagation of magnetohydrodynamic waves. We report a high-resolution observation of a surge observed with 1.6 m Goode Solar Telescope (GST) on 2009 August 26, from 18:20 UT to 18:45 UT. Characteristics of plasma motions in the surge are determined with the normalizing radial gradient filter and the Fourier motion filter. The shape of the surgeis found to change from a"C" shape to an inverse "C" shape after a formation of a cusp, a signature ofreconnection. There are apparent upflows seen above the cusp top and downflows below it. The upflows showrising and rotational motions in the right-hand direction, with the rotational speed decreasing with height. Near thecusp top, wefind a transverse oscillation of the surge, with the period of ∼2 minutes. There is no change of theoscillation phase below the cusp top, but above the top a phase change is identified, giving a vertical phase speedabout 86 km s-1. As the height increases, the initial amplitude of the oscillation increases, and the oscillationdamping time decreases from 5.13 to 1.18 minutes. We conclude that the oscillation is a propagating kink wavethat is possibly excited by the repetitive spontaneous magnetic reconnection.

Authors: Cho, K.-S., Cho, I.-H., Nakariakov, V.M., Yurchyshyn, V.B., Yang, H., Kim, Y.-H., Kumar, P., Magara, T.
Projects: None

Publication Status: Astrophysical Journal Letters, 877, L1, 2019
Last Modified: 2019-06-12 12:21
Go to main E-Print page  High resolution observations with Artemis--JLS, (II) Type IV associated intermediate drift bursts  Radio Observations of the January 20, 2005 X-Class Event  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
The role and contribution of magnetic fields, characterized via their magnetic flux, to the statistical structuring of the solar atmosphere
Do periods of decayless kink oscillations of solar coronal loops depend on noise?
Automatic detection technique for solar filament oscillations in GONG data
Probing the Density Fine Structuring of the Solar Corona with Comet Lovejoy
Confined plasma transition from the solar atmosphere to the interplanetary medium
Extracting the Heliographic Coordinates of Coronal Rays using Images from WISPR/Parker Solar Probe
Two-spacecraft detection of short-period decayless kink oscillations of solar coronal loops
Genesis and Coronal-jet-generating Eruption of a Solar Minifilament Captured by IRIS Slit-raster Spectra
First detection of transverse vertical oscillation during the expansion of coronal loops
A New Position Calibration Method for MUSER Images
Sigmoid Formation Through Slippage of A Single J-shaped Coronal Loop
MHD Simulation of Homologous Eruptions from Solar Active Region 10930 Caused by Sunspot Rotation
Dropouts of Fully Stripped Ions in the Solar Wind: A Diagnostic for Wave Heating versus Reconnection
Plasma heating and nanoflare caused by slow-mode wave in a coronal loop
The Lyman-α Emission in a C1.4 Solar Flare Observed by the Extreme Ultraviolet Imager aboard Solar Orbiter
Imaging and Spectroscopic Observations of the Dynamic Processes in Limb Solar Flares
Evolution of the critical torus instability height and CME likelihood in solar active regions
A Magnetogram-matching Method for Energizing Magnetic Flux Ropes Toward Eruption
A 2D Model for Coronal Bright Points: Association with Spicules, UV bursts, Surges and EUV Coronal Jets
The relativistic solar particle event on 28 October 2021: Evidence of particle acceleration within and escape from the solar corona

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey

© 2000-2020 Solar Physics Group - Montana State University