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Abstract— We applied a new approach to measure the time delays of magnetohydrodynamic waves propagating in the solar atmosphere. A small flare in the flare region of the chromosphere served… Click to show full abstract
Abstract— We applied a new approach to measure the time delays of magnetohydrodynamic waves propagating in the solar atmosphere. A small flare in the flare region of the chromosphere served as a modulator of 3‑ and 5-minute oscillations. The oscillation amplitude increased several times, which made it possible to easily fix the wave train formed as it spread upward through the solar atmosphere layers. Such a short-term and well-defined wave train serves as a convenient tool for determining the velocity of propagating magnetohydrodynamic waves, since it avoids the uncertainties in the measurement of the phase shift that arise under ordinary conditions. The advantage of using amplitude modulation from a small flare is that it makes it possible to study the atmosphere of the Sun under conditions close to those in an unperturbed atmosphere.
Journal Title: Astronomy Reports
Year Published: 2020
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