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Title: Plasma Brightenings in a Failed Solar Filament Eruption

Abstract

Failed filament eruptions are solar eruptions that are not associated with coronal mass ejections. In a failed filament eruption, the filament materials usually show some ascending and falling motions as well as generating bright EUV emissions. Here we report a failed filament eruption (SOL2016-07-22) that occurred in a quiet-Sun region observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory . In this event, the filament spreads out but gets confined by the surrounding magnetic field. When interacting with the ambient magnetic field, the filament material brightens up and flows along the magnetic field lines through the corona to the chromosphere. We find that some materials slide down along the lifting magnetic structure containing the filament and impact the chromosphere, and through kinetic energy dissipation, cause two ribbon-like brightenings in a wide temperature range. There is evidence suggesting that magnetic reconnection occurs between the filament magnetic structure and the surrounding magnetic fields where filament plasma is heated to coronal temperatures. In addition, thread-like brightenings show up on top of the erupting magnetic fields at low temperatures, which might be produced by an energy imbalance from a fast drop of radiative cooling due to plasma rarefaction. Thus, this singlemore » event of a failed filament eruption shows the existence of a variety of plasma brightenings that may be caused by completely different heating mechanisms.« less

Authors:
;  [1]
  1. School of Astronomy and Space Science, Nanjing University, Nanjing 210023 (China)
Publication Date:
OSTI Identifier:
22661257
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 838; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHROMOSPHERE; ELEVATORS; EMISSION; ENERGY LOSSES; ERUPTION; EXTREME ULTRAVIOLET RADIATION; FILAMENTS; HEATING; MAGNETIC FIELDS; MAGNETIC RECONNECTION; MASS; PLASMA FILAMENT; RADIATIVE COOLING; SUN; ULTRAVIOLET RADIATION

Citation Formats

Li, Y., and Ding, M. D., E-mail: yingli@nju.edu.cn. Plasma Brightenings in a Failed Solar Filament Eruption. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA6348.
Li, Y., & Ding, M. D., E-mail: yingli@nju.edu.cn. Plasma Brightenings in a Failed Solar Filament Eruption. United States. doi:10.3847/1538-4357/AA6348.
Li, Y., and Ding, M. D., E-mail: yingli@nju.edu.cn. Mon . "Plasma Brightenings in a Failed Solar Filament Eruption". United States. doi:10.3847/1538-4357/AA6348.
@article{osti_22661257,
title = {Plasma Brightenings in a Failed Solar Filament Eruption},
author = {Li, Y. and Ding, M. D., E-mail: yingli@nju.edu.cn},
abstractNote = {Failed filament eruptions are solar eruptions that are not associated with coronal mass ejections. In a failed filament eruption, the filament materials usually show some ascending and falling motions as well as generating bright EUV emissions. Here we report a failed filament eruption (SOL2016-07-22) that occurred in a quiet-Sun region observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory . In this event, the filament spreads out but gets confined by the surrounding magnetic field. When interacting with the ambient magnetic field, the filament material brightens up and flows along the magnetic field lines through the corona to the chromosphere. We find that some materials slide down along the lifting magnetic structure containing the filament and impact the chromosphere, and through kinetic energy dissipation, cause two ribbon-like brightenings in a wide temperature range. There is evidence suggesting that magnetic reconnection occurs between the filament magnetic structure and the surrounding magnetic fields where filament plasma is heated to coronal temperatures. In addition, thread-like brightenings show up on top of the erupting magnetic fields at low temperatures, which might be produced by an energy imbalance from a fast drop of radiative cooling due to plasma rarefaction. Thus, this single event of a failed filament eruption shows the existence of a variety of plasma brightenings that may be caused by completely different heating mechanisms.},
doi = {10.3847/1538-4357/AA6348},
journal = {Astrophysical Journal},
number = 1,
volume = 838,
place = {United States},
year = {Mon Mar 20 00:00:00 EDT 2017},
month = {Mon Mar 20 00:00:00 EDT 2017}
}