E-Print Archive

There are 3775 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Characteristics that Produce White-Light Enhancements in Solar Flares Observed by Hinode/SOT View all abstracts by submitter

Kyoko Watanabe   Submitted: 2017-10-27 06:12

To understand the conditions that produce white-light (WL) enhancements in solar flares, a statistical analysis of visible continuum data as observed by Hinode/Solar Optical Telescope (SOT) was performed. In this study, approximately 100 flare events from M- and X-class flares were selected. The time period during which the data were recorded spans from January 2011 to February 2016. Of these events, approximately half are classified as white-light flares (WLFs), whereas the remaining events do not show any enhancements of the visible continuum (non-WLF; NWL). In order to determine the existence of WL emission, running difference images of not only the Hinode/SOT WL (G-band, blue, green, and red filter) data but also the Solar Dynamics Observatory/Helioseismic and Magnetic Imager continuum data are used. A comparison between these two groups of WL data in terms of duration, temperature, emission measure of GOES soft X-rays, distance between EUV flare ribbons, strength of hard X-rays, and photospheric magnetic field strength was undertaken. In this statistical study, WLF events are characterized by a shorter time-scale and shorter ribbon distance compared with NWL events. From the scatter plots of the duration of soft X-rays and the energy of non-thermal electrons, a clear distinction between WLF and NWL events can be made. It is found that the precipitation of large amounts of accelerated electrons within a short time period plays a key role in generating WL enhancements. Finally, it was demonstrated that the coronal magnetic field strength in the flare region is one of the most important factors that allow the individual identification of WLF events from NWL events.

Authors: Kyoko Watanabe, Jun Kitagawa, Satoshi Masuda
Projects: GOES X-rays,Hinode/SOT,RHESSI,SDO-HMI

Publication Status: accepted for publication in ApJ
Last Modified: 2017-10-27 10:44
Go to main E-Print page  Characteristics of Sustained >100 γ-ray Emission Associated with Solar Flares  Solar Energetic Particle Forecasting Algorithms and Associated False Alarms  Edit Entry  Download Preprint  Delete Entry 

Key
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
A Statistical Analysis of the Solar Phenomena Associated with Global EUV Waves
Imaging Spectroscopy of Solar Radio Burst Fine Structures
On a small-scale EUV wave: the driving mechanism and the associated oscillating filament
Type III Solar Radio Burst Source Region Splitting Due to a Quasi-Separatrix Layer
On a solar blowout jet: driven mechanism and the formation of cool and hot components
Understanding the Role of Mass-Unloading in Filament Eruptions
Surges and Si IV bursts in the solar atmosphere. Understanding IRIS and SST observations through RMHD experiments
The direct relation between the duration of magnetic reconnection and the evolution of GOES light curves in solar flares
Large-Amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis
Statistical Study of Solar White-light Flares and Comparisons with Superflares on Solar-type Stars
Effect of local thermal equilibrium misbalance on long-wavelength slow magnetoacoustic waves
Characteristics of Sustained >100 γ-ray Emission Associated with Solar Flares
Characteristics that Produce White-Light Enhancements in Solar Flares Observed by Hinode/SOT
Solar Energetic Particle Forecasting Algorithms and Associated False Alarms
Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube
High-wavenumber solar f-mode strengthening prior to active region formation
Block-induced complex structures building the flare-productive solar active region 12673
Reconstruction of a Large-scale Pre-flare Coronal Current Sheet Associated with an Homologous X-shaped Flare
Comparison of Two Coronal Magnetic Field Models for Reconstructing a Sigmoidal Solar Active Region With Coronal Loops
A Magnetic Bald-Patch Flare in Solar Active Region 11117

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



© 2003 Solar Physics Group - Montana State University