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  • NAM2019
    • Registration
    • Key Dates & Outline Schedule
    • Practical Information
    • Exhibitors
    • Grants & Bursaries
    • Contacts
  • Science
    • Science Programme
    • Parallel Sessions
    • Plenary Talks
    • Community Session
    • Special Lunches
    • Posters
    • Presenter Guidelines
  • Social
    • What's On
    • Welcome Reception
    • RAS Awards Dinner
  • Media
  • Outreach
    • Outreach and Education Day
    • Fringe Event
    • School Visit Day
  • Lancaster
    • Travel
    • Accommodation
    • Childcare
    • Campus Map
    • About Lancaster
    • Code of Conduct

Programme by Session

Schedule

id
Monday
date time
PM2
16:44-16:58
Abstract
MHD waves in multi-layered waveguides

Abstract details

id
MHD waves in multi-layered waveguides
Date Submitted
2019-03-15 15:45:34
Noemi Kinga
Zsamberger
The University of Sheffield
Magnetohydrodynamic Waves and Instabilities in the Solar Atmosphere in the High-Resolution Era
Talk
Noemi Kinga Zsamberger, Matthew Allcock, Daria Shukhobodskaia, Robert Erdelyi
We present a family of multi-layered asymmetric waveguide models as a generalisation of the classical (symmetric) slab configuration and demonstrate their wide range of applications using high-resolution solar observations.
Diagnosing the solar atmospheric plasma is one of the major challenges in solar physics. Magnetohydrodynamic (MHD) waves, by means of applying the methods of solar magneto-seismology (SMS), provide a powerful tool to diagnose the solar plasma in a range of MHD waveguides e.g. from small magnetic bright points (MBPs), pores to large structures like prominences. Here, we present the framework of a new model to describe MHD wave propagation. Namely, we employ a family of asymmetric Cartesian waveguide models that can better capture the structured solar atmosphere. We describe a general multi-layered, stationary MHD waveguide and its asymmetric (externally magnetic and non-magnetic) one-slab special cases. Additionally, we investigate the effect of one or more steady bulk flows on the dispersion and stability of MHD waves in an asymmetric magnetic slab system.
With the recent and ongoing developments in high-resolution solar observations, each of these models can be utilised to describe different features in the solar atmosphere, such as elongated MBPs, light walls, fibrils, prominences, and CME flanks. We show a sample of these applications and demonstrate how the SMS diagnostic power of waveguide asymmetry can be utilised in these structures.

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