Magnetic effects on solar p-modes
نویسندگان
چکیده
منابع مشابه
EXCITATION OF SOLAR p-MODES
We investigate the rates at which energy is supplied to individual p-modes as a function of their frequencies v and angular degrees t. The observationally determined rates are compared with those calculated on the hypothesis that the modes are stochastically excited by turbulent convection. The observationally determined excitation rate is assumed to be equal to the product of the mode's energy...
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We search for sources and sinks of solar p-mode waves by creating absorption maps from Dopplergrams taken by the Michelson Doppler Interferometer (MDI) instrument on board SOHO. Although the maps are noisy, we present evidence for sources and sinks, of duration 0.5 { 1 hour or less, based on an autocorrelation analysis of maps made from sequential intervals of data. Emission and absorption near...
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We have calculated the radial non-adiabatic p-mode oscillations of the solar models. Based on a statistical theory of non-local convection, both the thermodynamic and kinetic couplings between convection and oscillations are finely treated. The turbulent pressure, turbulent viscosity, turbulent thermal flux and turbulent kinetic flux are all self-consistently included in the equations. The depa...
متن کاملSOLAR SEISMOLOGY. I. THE STABILITY OF THE SOLAR p-MODES*
We investi~ate the s~ability of the radialp-modes of the Sun by computing nonadiabatic eigenvalues and e1genfunc~ons for a solar envelope model which extends from an inner radius r ~ 0.3 J!..e out to an optical depth -r ~ 3 x I04 • Our calculations take into account in a crude fashion the re~ponse of.the convec?ve ~ux to the oscillation. The dynamical effect of turbulence m the convection zone ...
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We employ tomographic observations of a small region of plage to study the propagation of waves from the solar photosphere to the chromosphere using a Fourier phase-difference analysis. Our results show the expected vertical propagation for waves with periods of 3 minutes. Waves with 5-minute periods, i.e., above the acoustic cut-off period, are found to propagate only at the periphery of the p...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1988
ISSN: 0074-1809
DOI: 10.1017/s0074180900157985