E-Print Archive

There are 4194 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
Cosmic ray interactions in the solar atmosphere View all abstracts by submitter

Hugh Hudson   Submitted: 2020-02-08 08:30

High-energy particles enter the solar atmosphere from Galactic or solar coronal sources, and produce 'albedo' emission from the quiet Sun that is now observable across a wide range of photon energies. The interaction of high-energy particles in a stellar atmosphere depends essentially upon the joint variation of the magnetic field and plasma density, which heretofore has been characterized parametrically as P ∝ Bα with P the gas pressure and B the magnitude of the magnetic field. We re-examine that parametrization by using a self-consistent 3D MHD model (Bifrost) and show that this relationship tends to P ∝ B3.5 ± 0.1 based on the visible portions of the sample of open-field flux tubes in such a model, but with large variations from point to point. This scatter corresponds to the strong meandering of the open-field flux tubes in the lower atmosphere, which will have a strong effect on the prediction of the emission anisotropy (limb brightening). The simulations show that much of the open flux in coronal holes originates in weak-field regions within the granular pattern of the convective motions seen in the simulations.

Authors: Hugh Hudson, Alec MacKinnon, Mikolaj Szydlarski, Mats Carlsson
Projects: None

Publication Status: MNRAS, published, 2020MNRAS.491.4852H
Last Modified: 2020-02-11 09:57
Go to main E-Print page  NVST observations of collision-induced apparent fan-shaped jets  A correlation in the waiting-time distributions of solar flares  Edit Entry  Download Preprint  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
HATS: A Ground-Based Telescope to Explore the THz Domain
Failed prominence eruptions near 24 cycle maximum
Properties of Streamer Wave Events Observed During the STEREO Era
Simulating Solar Flare Irradiance with Multithreaded Models of Flare Arcades
Counter-streaming strahls and heat flux dropouts as possible signatures of local particle acceleration in the solar wind
New Star Observations with NuSTAR: Flares from Young Stellar Objects in the ρ Ophiuchi Cloud Complex in Hard X-Rays
Accelerated Electrons Observed Down to <7 keV in a NuSTAR Solar Microflare
Magnetic helicity dissipation and production in an ideal MHD code
Magnetic twist profile inside magnetic clouds derived with a superposed epoch analysis
Properties of ICME-Induced Forbush decreases at Earth and Mars
White-light Emission and Chromospheric Response by an X1.8-class Flare on 2012 October 23
Helicity and winding fluxes as indicators of twisted flux emergence
Magnetic connectivity between the light bridge and penumbra in a sunspot
Can Sub-photospheric Magnetic Reconnection Change the Elemental Composition in the Solar Corona?
Response of SDO/HMI observables to heating of the solar atmosphere by precipitating high-energy electrons
3He-Rich Solar Energetic Particles: Solar Sources
Statistical Study of Hard X-Ray Emitting Electrons Associated with Flare-related Coronal Jets
Rapid Evolution of Type II Spicules Observed in Goode Solar Telescope On-Disk Hα Images
Diagnostics of plasma ionisation using torsional Alfvén waves
Nonequilibrium ionization and ambipolar diffusion in solar magnetic flux emergence processes

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



© 2003 Solar Physics Group - Montana State University