E-Print Archive

There are 4620 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
Magnetohydrodynamics Instabilities of Double Magnetic Bands in a Shallow-water Tachocline Model: I Cross-equatorial Interactions of Bands View all abstracts by submitter

Bernadett Belucz   Submitted: 2023-01-25 13:03

Along with the "butterfly diagram" of sunspots, combined observational studies of ephemeral active regions, X-ray and EUV brightpoints, plage, filaments, faculae and prominences demonstrate a pattern, which is known as the Extended Solar Cycle (ESC). This pattern indicates the wings of the sunspot butterfly could be extended to much higher latitudes (up to ~ 60 degrees), to earlier time than the start of a sunspot cycle, hence yielding a strong overlap between cycles. Thus during the ongoing cycle's activity near 30-degrees latitude in each hemisphere, the next cycle kicks off at around 60-degrees. By representing these epochs of overlaps by oppositely-directed double magnetic bands in each hemisphere, we compute the unstable eigenmodes for MHD Rossby waves at the base of the convection zone and study how the properties of these energetically active Rossby waves change as these band-pairs migrate equatorward. We find that in each hemisphere the low-latitude band interacts with the high-latitude band and drive the MHD instability as the solar activity progresses from 35° to 15° latitude, which is essentially the rising phase. When the activity proceeds further equatorward from 15-degrees, interaction between low- and high-latitude bands weakens, and the cross-equatorial interaction between two low-latitude bands in each hemisphere starts. The eigenmodes in latitude-longitude planforms also reflect such changes in their pattern as the bend of the the active cycle moves below 15-degree latitude.

Authors: Bernadett Belucz, Mausumi Dikpati, Scott W. McIntosh, Robert J. Leamon, Robertus Erdelyi
Projects: None

Publication Status: ApJ (accepted)
Last Modified: 2023-01-28 10:42
Go to main E-Print page  Detection of a high-velocity prominence eruption leading to a CME associated with a superflare on the RS CVn-type star V1355 Orionis  Stability of slow magnetoacoustic and entropy waves in the solar coronal plasma with thermal misbalance  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
High-altitude Spider-type Prominence above the Magnetic Null Point
Non-Neutralized Electric Currents as a Proxy for Eruptive Activity in Solar Active Regions
Formation and Dynamics in an Observed Preeruptive Filament
Unveiling the spectacular over 24-hour flare of star CD-36 3202
The centroid speed as a characteristic of the group speed of solar coronal fast magnetoacoustic wave trains
Coronal dimmings as indicators of early CME propagation direction
A Chromatic Treatment of Linear Polarization in the Solar Corona at the 2023 Total Solar Eclipse
MinXSS-2 CubeSat mission overview: Improvements from the successful MinXSS-1 mission
Small Satellite Mission Concepts for Space Weather Research and as Pathfinders for Operations
Study of Time Evolution of Thermal and Nonthermal Emission from an M-class Solar Flare
Achievements and Lessons Learned From Successful Small Satellite Missions for Space Weather-Oriented Research
Scaling of Electron Heating by Magnetization During Reconnection and Applications to Dipolarization Fronts and Super-Hot Solar Flares
Defining the Middle Corona
First Results for Solar Soft X-Ray Irradiance Measurements from the Third-generation Miniature X-Ray Solar Spectrometer
Deciphering the solar coronal heating: Energizing small-scale loops through surface convection
Using Potential Field Extrapolations to Explore the Origin of Type II Spicules
Phase mixed Alfvén waves in partially ionised solar plasmas
Terrestrial temperature, sea levels and ice area links with solar activity and solar orbital motion
A model of failed solar eruption initiated and destructed by magnetic reconnection
Energetics of a solar flare and a coronal mass ejection generated by a hot channel 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