Solar Magnetohydrodynamics

Solar Magnetohydrodynamics

Code: 205292
ECTS: 0.0
Lecturers in charge: dr. sc. Bojan Vršnak - Lectures
Take exam: Studomat
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1. komponenta

Lecture typeTotal
Lectures 15
Exercises 15
* Load is given in academic hour (1 academic hour = 45 minutes)
Description:
1. Introduction:
a) solar structure, especially the convective zone and the atmosphere
b) solar activity and 22-year magnetic cycle
c) influence of the solar activity on the interplanetary space and the Earth.
2. Basic properties of the magnetohydrodynamic approximation (MHD):
a) MHD equations and basic MHD parameters
b) application to astrophysical conditions
c) MHD waves and shocks
d) ideal and dissipative MHD instabilities
e) magnetic reconnection.
3. Solar MHD dynamo - the source of solar magnetism:
a) differential rotation
b) interaction of the magnetic field, convection and rotation
c) global electric-current system and energy storage
d) magnetic field emergence
e) solar activity cycle.
4. Active regions:
a) sunspots - formation and evolution
b) coronal structure
c) local MHD dynamo.
5. Solar prominences:
a) formation, structure, and evolution
b) loss of equilibrium
c) eruption process.
6. Eruptive processes - I:
a) coronal mass ejections (CMEs) - causes and evolution
b) solar flares - causes and evolution.
7. Eruptive processes - II:
a) CME-flare relationship
b) formation and evolution of global shock waves.
8. Coronal holes and solar wind:
a) Parker model
b) heliospheric magnetic field
c) fast and slow solar wind
d) corotating interaction regions.
9. Influence of eruptive processes solar-wind state:
a) interplanetary CMEs
b) interplanetary shock waves
c) high-energy particle beams.
10. Solar-terrestrial physics:
a) ionospheric changes due to X- and EUV-bursts
b) effects of particle beams
c) geomagnetic storms
d) Forbush decrease
e) space weather.
Literature:
  1. E. R. Priest: Solar Magnetohydrodynamics (Springer, 1984)
  2. M. Aschwanden: Physics of the Solar Corona (Springer 2005)
  3. B. Vršnak: Temelji fizike plazme (Šk. knjiga, 1996)
1. semester
Astrofizika - izborni predmeti - Mandatory smjer - Astrophysics
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