E-Print Archive

There are 4499 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
Quasi-periodic pulsations in the most powerful solar flare of Cycle 24 View all abstracts by submitter

Dmitrii Kolotkov   Submitted: 2018-04-13 07:42

Quasi-periodic pulsations (QPP) are common in solar flares and are now regularly observed in stellar flares. We present the detection of two different types of QPP signals in the thermal emission light curves of the X9.3 class solar flare SOL2017-09-06T12:02, which is the most powerful flare of Cycle 24. The period of the shorter-period QPP drifts from about 12 to 25 seconds during the flare. The observed properties of this QPP are consistent with a sausage oscillation of a plasma loop in the flaring active region. The period of the longer-period QPP is about 4 to 5 minutes. Its properties are compatible with standing slow magnetoacoustic oscillations, which are often detected in coronal loops. For both QPP signals, other mechanisms such as repetitive reconnection cannot be ruled out, however. The studied solar flare has an energy in the realm of observed stellar flares, and the fact that there is evidence of a short-period QPP signal typical of solar flares along with a long-period QPP signal more typical of stellar flares suggests that the different ranges of QPP periods typically observed in solar and stellar flares is likely due to observational constraints, and that similar physical processes may be occurring in solar and stellar flares.

Authors: Dmitrii Kolotkov, Chloe Pugh, Anne-Marie Broomhall, and Valery Nakariakov
Projects: GOES X-rays,SDO-EVE

Publication Status: accepted for publication in ApJL
Last Modified: 2018-04-13 18:14
Go to main E-Print page  Enhanced stellar activity for slow antisolar differential rotation?  GONG Catalog of Solar Filament Oscillations Near Solar Maximum  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
Small-scale solar jet formation and their associated waves and instabilities
Invited Review: Short-term Variability with the Observations from the Helioseismic and Magnetic Imager (HMI) Onboard the Solar Dynamics Observatory (SDO): Insights into Flare Magnetism
A first look at the submillimeter Sun with ALMA
Data-driven modeling of solar coronal magnetic field evolution and eruptions
Properties and Energetics of Magnetic Reconnection: I. Evolution of Flare Ribbons
A new look at the frequency-dependent damping of slow-mode waves in the solar corona
What determines active region coronal plasma composition?
Characteristics and evolution of sheath and leading edge structures of interplanetary coronal mass ejections in the inner heliosphere based on Helios and Parker Solar Probe observations
Slow magnetoacoustic oscillations in stellar coronal loops
Kink Oscillation of a Flux Rope During a Failed Solar Eruption
A publicly available multi-observatory data set of an enhanced network patch from the Photosphere
Type IV Radio Bursts and Associated Active Regions in the Sunspot Cycle 24
Theory of Fluid Instabilities in Partially Ionized Plasmas: An Overview
Quasiperiodic Energy Release and Jets at the Base of Solar Coronal Plumes
The Coupling of an EUV Coronal Wave and Ion Acceleration in a Fermi-LAT Behind-the-Limb Solar Flare
Reconciling Power Law Slopes in Solar Flare and Nanoflare Size Distributions
A Model of Homologous Confined and Ejective Eruptions Involving Kink Instability and Flux Cancellation
Detection of stellar-like abundance anomalies in the slow solar wind
Magnetosheath jet occurrence rate in relation to CMEs and SIRs
Microwave Perspective on Magnetic Breakout Eruption

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