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Anisotropic Magnetized Asteroseismic Waves
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DOI：10.3847/1538-4357/ad81d3.png)
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摘要
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We solve for waves in a polytropic, stratified plasma with a spatially varying background magnetic field that points along the horizontal x-direction, and with gravity that is directed along the vertical z-direction. Force balance determines the magnitude of the background magnetic field, B02 similar to zn+1 , where n is the polytropic index. Using numerical and asymptotic methods, we deduce an explicit dispersion relation for fast pressure-driven waves: Omega 2 similar to K2m+n[1+1/MA2(4-2 gamma + cos2 theta-3cos4 theta)/4] . Here, Omega is the frequency, K is the wavenumber, theta is the angle the wavevector makes with the background magnetic field, M A is the Alfv & eacute;nic Mach number, and m is an integer representing the eigenstate. We discuss the roles of such an explicit formula in asteroseismology.
Keyword:
SOLAR F-MODE
P-MODES
GRAVITY
FIELDS
ROTATION
CORES
WKB
期刊
IF:
5.4
论文数:
8.3W
被引数:
32.0W
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引用论文
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