E-Print Archive

There are 4512 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
Quasiperiodic Energy Release and Jets at the Base of Solar Coronal Plumes View all abstracts by submitter

Pankaj Kumar   Submitted: 2022-05-03 20:39

Coronal plumes are long, ray-like, open structures, which have been considered as possible sources for the solar wind. Their origin in the largely unipolar coronal holes has long been a mystery. Earlier spectroscopic and imaging observations revealed blue-shifted plasma and propagating disturbances (PDs) in plumes that are widely interpreted in terms of flows and/or propagating slow-mode waves, but these interpretations (flows vs waves) remain under debate. Recently we discovered an important clue about plume internal structure: dynamic filamentary features called "plumelets", which account for most of the plume emission. Here we present high-resolution observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) and the Interface Region Imaging Spectrograph (IRIS) that revealed numerous, quasiperiodic, tiny jets (so-called "jetlets") associated with transient brightening, flows, and plasma heating at the chromospheric footpoints of the plumelets. By analogy to larger coronal jets, these jetlets are most likely produced within the plume base by magnetic reconnection between closed and open flux at stressed 3D null points. The jetlet-associated brightenings are in phase with plumelet-associated PDs, and vary with a period of about 3 to 5 minutes, which is remarkably consistent with the photospheric/chromospheric p-mode oscillation. This reconnection at the open-closed boundary in the chromosphere/transition region is likely modulated or driven by local manifestations of the global p-mode waves. The jetlets extend upward to become plumelets, contribute mass to the solar wind, and may be sources of the switchbacks recently detected by the Parker Solar Probe.

Authors: Pankaj Kumar, Judith T. Karpen, Vadim M. Uritsky, Craig E. Deforest, Nour E. Raouafi, C. Richard DeVore
Projects: None

Publication Status: 22 pages, 14 figures, ApJ (in press)
Last Modified: 2022-05-04 13:20
Go to main E-Print page  Theory of Fluid Instabilities in Partially Ionized Plasmas: An Overview  The Coupling of an EUV Coronal Wave and Ion Acceleration in a Fermi-LAT Behind-the-Limb Solar Flare  Edit Entry  Download Preprint  Submitter's Homepage 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
Grid-based imaging in X-rays and gamma-rays with high spatial resolution
It Takes a Village (Invited memoir)
Maximal growth rate of the ascending phase of a sunspot cycle for predicting its amplitude
Starspots Modelling and Flare Analysis on Selected MV Stars
Doubling of minute-long Quasi-Periodic Pulsations from super-flares on a low mass star
Geometric Assumptions in Hydrodynamic Modeling of Coronal and Flaring Loops
Sun-as-a-star Analysis of Hα Spectra of a Solar Flare Observed by SMART/SDDI: Time Evolution of Red Asymmetry and Line Broadening
Searching for quasi-periodic oscillations in astrophysical transients using Gaussian processes
Analysis of the Evolution of a Multi-Ribbon Flare and Failed Filament Eruption
Current-sheet Oscillations Caused by Kelvin-Helmholtz Instability at the Loop Top of Solar Flares
Annihilation of Magnetic Islands at the Top of Solar Flare Loops
Three-dimensional Magnetic and Thermodynamic Structures of Solar Microflares
Grow-up of a Filament Channel by Intermittent Small-scale Magnetic Reconnection
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?

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