E-Print Archive

There are 4310 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
* News 04/04/20 * The archive is using a new backend database. This has thrown up a few SQL errors in the last few days. If you have any issues please email adavey@nso.edu with either the number of eprint you are trying to edit or a link to your preprint.

Intrusion of Magnetic Peninsula toward the Neighboring Opposite-polarity Region That Triggers the Largest Solar Flare in Solar Cycle 24 View all abstracts by submitter

Yumi Bamba   Submitted: 2020-05-05 00:17

The largest X9.3 solar flare in solar cycle 24 and the preceding X2.2 flare occurred on September 6, 2017, in the solar active region NOAA 12673. This study aims to understand the onset mechanism of these flares via analysis of multiple observational datasets from the Hinode and Solar Dynamics Observatory and results from a non-linear force-free field extrapolation. The most noticeable feature is the intrusion of a major negative-polarity region, appearing similar to a peninsula, oriented northwest into a neighboring opposite-polarity region. We also observe proxies of magnetic reconnection caused by related to the intrusion of the negative peninsula: rapid changes of the magnetic field around the intruding negative peninsula; precursor brightening at the tip of the negative peninsula, including a cusp-shaped brightening that shows a transient but significant downflow (~100 km s-1) at a leg of the cusp; a dark tube-like structure that appears to be a magnetic flux rope that erupted with the X9.3 flare; and coronal brightening along the dark tube-like structure that appears to represent the electric current generated under the flux rope. Based on these observational features, we propose that (1) the intrusion of the negative peninsula was critical in promoting the push-mode magnetic reconnection that forms and grows a twisted magnetic flux rope that erupted with the X2.2 flare, (2) the continuing intrusion progressing even beyond the X2.2 flare is further promoted to disrupt the equilibrium that leads the reinforcement of the magnetic flux rope that erupted with the X9.3 flare.

Authors: Yumi Bamba, Satoshi Inoue, Shinsuke Imada
Projects: Hinode/EIS,Hinode/SOT,Hinode/XRT,SDO-AIA,SDO-HMI

Publication Status: published (ApJ)
Last Modified: 2020-05-06 13:30
Go to main E-Print page  Temporal evolution of oscillating coronal loops  On the Relationship Between Transit Time of ICMEs and Strength of the Initiated Geomagnetic Storms  Edit Entry  Download Preprint  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
Thermal-nonthermal energy partition in solar flares derived from X-ray, EUV, and bolometric observations
From Pseudostreamer Jets to Coronal Mass Ejections: Observations of the Breakout Continuum
Designing a New Coronal Magnetic Field Energy Diagnostic
A Three-Dimensional Velocity of an Erupting Prominence Prior to a Coronal Mass Ejection
Spectroscopic observations of a flare-related coronal jet
Catalog of Solar Failed Eruptions and Other Dynamic Features Registered by SDO/AIA
The non-Fourier image reconstruction method for the STIX instrument
Observation and Modeling of Solar Jets
Challenges and Advances in Modeling of the Solar Atmosphere: A White Paper of Findings and Recommendations
Non-equilibrium Flux Rope Formation by Confined Flares Preceding a Solar Coronal Mass Ejection
Radio Measurements of the Magnetic Field in the Solar Chromosphere and the Corona
A Fast, Simple, Robust Algorithm for Coronal Temperature Reconstruction
Nonlinear Alfvén Wave Model of Stellar Coronae and Winds from the Sun to M dwarfs
Possibility of Diagnostics of the Beginning of Solar Cycle 25 Based on Its Precursors at Mid-Heliolatitudes
The chromospheric component of coronal bright points. Coronal and chromospheric responses to magnetic-flux emergence
Structure of the Solar Atmosphere: A Radio Perspective
Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows
ALMA and IRIS Observations of the Solar Chromosphere II: Structure and Dynamics of Chromospheric Plage
ALMA and IRIS Observations of the Solar Chromosphere I: an On-Disk Type II Spicule
Evolution of a Steamer-Blowout CME as Observed by Imagers on Parker Solar Probe and the Solar Terrestrial Relations Observatory

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