E-Print Archive

There are 4375 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
Bayesian Analysis of Quasi-periodic Pulsations in Stellar Flares View all abstracts by submitter

David James Pascoe   Submitted: 2020-11-02 17:06

Quasi-periodic pulsations (QPPs) are routinely observed in a range of wavelengths during flares but in most cases the mechanism responsible is unknown. We present a method to detect and characterise QPPs in time series such as light curves for solar or stellar flares based on forward modelling and Bayesian analysis. We include models for QPPs as oscillations with finite lifetimes and non-monotonic amplitude modulation, such as wave trains formed by dispersive evolution in structured plasmas. By quantitatively comparing different models using Bayes factors we characterise the QPPs according to five properties; sinusoidal or non-sinusoidal, finite or indefinite duration, symmetric or asymmetric perturbations, monotonic or non-monotonic amplitude modulation, and constant or varying period of oscillation. We demonstrate our method and show examples of these five characteristics by analysing QPPs in white light stellar flares observed by the Kepler space telescope. Different combinations of properties may be able to identify particular physical mechanisms and so improve our understanding of QPPs and allow their use as seismological diagnostics. We propose three observational classes of QPPs can be distinguished; decaying harmonic oscillations, finite wave trains, and non-sinusoidal pulsations.

Authors: D. J. Pascoe, A. Smyrli, T. Van Doorsselaere, and A.-M. Broomhall
Projects: Other

Publication Status: ApJ (accepted)
Last Modified: 2020-11-04 13:08
Go to main E-Print page  Time and Charge-Sign Dependence of the Heliospheric Modulation of Cosmic Rays  Cause and Kinematics of a Jetlike CME  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
One dimensional prominence threads: I. Equilibrium models
Time-dependent properties of sunspot groups - I. Lifetime and asymmetric evolution
Investigating Remote-sensing Techniques to Reveal Stealth Coronal Mass Ejections
ALMA observations of the variability of the quiet Sun at millimeter wavelengths
The Poissonian origin of power laws in solar flare waiting time distributions
Correlation of the sunspot number and the waiting time distribution of solar flares, coronal mass ejections, and solar wind switchback events observed with the Parker Solar Probe
Self-organized criticality in stellar flares
Finite system-size effectrs in self-organizing criticality systems
Global energetics of solar flares. XII. Energy scaling laws
Global energetics of solar flares. XI. Flare magnitude predictions of the GOES class
Are the Magnetic Fields Radial in the Solar Polar Region?
Fast magnetoacoustic wave trains: from tadpoles to boomerangs
Multi-channel coronal hole detection with convolutional neural networks
FOXSI-2 Solar Microflares. II. Hard X-ray Imaging Spectroscopy and Flare Energetics
Structure and Evolution of an Inter–Active Region Large-scale Magnetic Flux Rope
Variation of Magnetic Flux Ropes through Major Solar Flares
MHD Modeling of Solar Coronal Magnetic Evolution Driven by Photospheric Flow
The Causes of Peripheral Coronal Loop Contraction and Disappearance Revealed in a Magnetohydrodynamic Simulation of Solar Eruption
The Sun's Dynamic Extended Corona Observed in Extreme Ultraviolet
Magnetohydrodynamic Simulations of Spicular Jet Propagation Applied to Lower Solar Atmosphere Model

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