Wave Conversion, Decay, and Heating in a Partially Ionized Two-fluid Magneto-atmosphere
نویسندگان
چکیده
Abstract A ray-theoretic phase-space description of linear waves in a two-fluid (charges and neutrals) magnetized plasma is used to calculate analytic decay rates mode transmission conversion coefficients between fast slow two dimensions due finite ion–neutral collision frequencies at an arbitrary ionization fraction. This relevant partially ionized astrophysical plasmas, particular solar stellar atmospheres. The most important parameter governing collisional effects the ratio wave frequency neutral–charges frequency, ϵ = ω / ν nc , with secondary dependence on fraction attack angle. Comparison made one-fluid magnetohydrodynamic case, it found that acoustic-to-acoustic magnetic-to-magnetic through Alfvén-acoustic equipartition layer decreased by term ( ϵ 2 stretchy="false">) relative (infinite frequency), correspondingly acoustic-to-magnetic magnetic-to-acoustic increased. neutral-acoustic shown dissipate rapidly as → ∞. Away from region, dissipative along remaining magneto-acoustic rays scales }(\epsilon )$?> be much more effective magnetically dominated compared acoustically rays. produces steep jump dissipation regions, where change character, can produce localized heating there beyond. Applications chromosphere are discussed.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2023
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/acbb63