E-Print Archive

There are 4249 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
* 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.

Longitudinal filament oscillations enhanced by two C-class flares View all abstracts by submitter

Qingmin Zhang   Submitted: 2020-01-09 00:03

Large-amplitude, longitudinal filament oscillations triggered by solar flares have been well established. However, filament oscillations enhanced by flares have never been reported. In this paper, we report the multiwavelength observations of a very long filament in active region (AR) 11112 on 2010 October 18. The filament was composed of two parts, the eastern part (EP) and western part (WP). We focus on longitudinal oscillations of the EP, which were enhanced by two homologous C-class flares in the same AR. The C1.3 flare was confined without a coronal mass ejection (CME). Both EP and WP of the filament were slightly disturbed and survived the flare. After 5 hrs, eruption of the WP generated a C2.6 flare and a narrow, jet-like CME. Three oscillating threads (thd_a, thd_b, thd_c) are obviously identified in the EP and their oscillations are naturally divided into three phases by the two flares. The initial amplitude ranges from 1.6 to 30 Mm with a mean value of ~14 Mm. The period ranges from 34 to 73 minutes with a mean value of ~53 minutes. The curvature radii of the magnetic dips are estimated to be 29 to 133 Mm with a mean value of ~74 Mm. The damping times ranges from ~62 to ~96 minutes with a mean value of ~82 minutes. The value of τ/P is between 1.2 and 1.8. For thd_a in the EP, the amplitudes were enhanced by the two flares from 6.1 Mm to 6.8 Mm after the C1.3 flare and further to 21.4 Mm after the C2.6 flare. The period variation as a result of perturbation from the flares was within 20%. The attenuation became faster after the C2.6 flare. To the best of our knowledge, this is the first report of large-amplitude, longitudinal filament oscillations enhanced by flares. Numerical simulations reproduce the oscillations of thd_a very well. The simulated amplitudes and periods are close to the observed values, while the damping time in the last phase is longer, implying additional mechanisms should be taken into account apart from radiative loss.

Authors: Q. M. Zhang, J. H. Guo, K. V. Tam, and A. A. Xu
Projects: SDO-AIA

Publication Status: accepted for publication in A&A
Last Modified: 2020-01-10 12:08
Go to main E-Print page  The New 2018 Version of the Meudon Spectroheliograph  Spatio-temporal energy partitioning in a non-thermally dominated two-loop solar flare  Edit Entry  Download Preprint  Submitter's Homepage 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
Ambipolar diffusion in the Bifrost code
Modeling the quiet Sun cell and network emission with ALMA
Clustering of fast Coronal Mass Ejections during the solar cycles 23 and 24 and implications for CME-CME interactions
Magnetic and Velocity Field Topology in Active Regions of Descending Phase of the Solar Cycle 23
Numerical simulation of solar photospheric jet-like phenomena caused by magnetic reconnection
Solar Flare-CME Coupling Throughout Two Acceleration Phases of a Fast CME
A new method for estimating global coronal wave properties from their interaction with solar coronal holes
Machine-learning approach to identification of coronal holes in solar disk images and synoptic maps
Multilevel Observations of the Oscillations in the First Active Region of the New Cycle
Standing MHD Waves in a Magnetic Slab Embedded in an Asymmetric Magnetic Plasma Environment: Surface Waves
A new facility for airborne solar astronomy: NASA's WB-57 at the 2017 total solar eclipse
MinXSS-2 CubeSat mission overview: Improvements from the successful MinXSS-1 mission
Lyman α Variability During Solar Flares Over Solar Cycle 24 Using GOES-15/EUVS-E
Sunquake with a second-bounce, other sunquakes and emission associated with X9.3 flare of 6 September 2017. II. Proposed interpretation
f-mode strengthening from a localized bipolar subsurface magnetic field
Imaging and spectral study on the null point of a fan-spine structure during a solar flare
Forecasting Solar Cycle 25 Using Deep Neural Networks
An Observational Test of Solar Plasma Heating by Magnetic Flux Cancellation
The Drivers of Active Region Outflows into the Slow Solar Wind
HXR emission from an activated flux rope and subsequent evolution of an eruptive long duration solar flare

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