Solar atmospheric magnetic effects on global acoustic and atmospheric gravity eigenoscillations

Balázs Pintér*

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

Crynodeb

Solar global observations suggest that the frequency and the line width of helioseismic acoustic eigenmodes vary with the solar cycle. One reason for the measured changes could be the variation of the global atmospheric magnetic fields. We model global solar oscillations in a plane-parallel, three-layer model within the framework of linear dissipative magnetohydrodynamics, and study the effects of a homogenous, horizontal atmospheric magnetic field on global oscillations. We find magnetoacoustic f- and p-modes and also atmospheric gravity modes (g-modes) among the eigenoscillations of the system. We conclude that changes in the atmospheric magnetic field can, significantly, shift the frequencies and vary the line width of global oscillation modes.

Iaith wreiddiolSaesneg
Tudalennau (o-i)541-545
Nifer y tudalennau5
CyfnodolynPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Cyfrol364
Rhif cyhoeddi1839
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 15 Chwef 2006

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