Coupling between the solar interior and atmosphere

B. Pintér*

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddTrafodion Cynhadledd (Nid-Cyfnodolyn fathau)


Global helioseismic oscillation modes are a window to the solar interior. They are acoustic waves trapped in the interior of the Sun and can give valuable information about the directly unobservable inner layers. The information can be properly decoded only if theoretical models explain how properties of the observed oscillations are influenced by their environment. Recent observations provide evidence that helioseismic modes are affected not only by the sub-photospheric layers but also by the lower atmosphere. Realistic numerical codes and simplified analytical models try to discover the complex nature of the interaction between helioseismic oscillations and the atmosphere. The complexity of the coupling is mainly due to the presence of an atmospheric magnetic field. Characteristic properties of oscillations, such as frequency, lifetime and penetration depth, can be derived from magnetohydrodynamic (MHD) equations, which govern the processes. Those properties are functions of the temperature profile of the coupled interior and atmospheric environment and the magnetic structure of the atmosphere. The derived equations provide valuable information about the ways oscillation modes are affected by the different properties of their medium. The models take into account realistic vertical profiles of temperature, plasma flows and magnetic field structures. In narrow layers, where the characteristic frequency of local magnetohydrodynamic (MHD) slow and/or Alfvén waves are equal to the global frequency of an acoustic wave, the latter will be resonantly coupled to the atmospheric magnetic field. The consequences of this resonant coupling are also studied by using dissipative MHD equations.

Iaith wreiddiolSaesneg
TeitlSpace Plasma Physics - Proceedings of the 4th School and Workshop on Space Plasma Physics
GolygyddionIvan Zhelyazkov, Todor Mishonov
CyhoeddwrAmerican Institute of Physics
Nifer y tudalennau6
ISBN (Electronig)9780735411760
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 2013
Digwyddiad4th Black Sea Biennial School and Workshop on Space Plasma Physics - Albena, Bwlgaria
Hyd: 19 Awst 201226 Awst 2012

Cyfres gyhoeddiadau

EnwAIP Conference Proceedings
ISSN (Argraffiad)0094-243X
ISSN (Electronig)1551-7616


Cynhadledd4th Black Sea Biennial School and Workshop on Space Plasma Physics
Cyfnod19 Awst 201226 Awst 2012

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