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Paper: Chromospheric Doppler Velocity Oscillations in a Sunspot
Volume: 478, Fifty Years of Seismology of the Sun and Stars
Page: 339
Authors: Maurya, R. A.
Abstract: We analyse the chromospheric Doppler velocity oscillations in a sunspot using the high resolution spectral observations obtained from the Fast Imaging Solar Spectrograph (FISS) of the New Solar Telescope at the Big Bear Solar Observatory. The Doppler velocity maps are constructed from the bisectors of the spectral observations. We find that the peak power frequency decreases gradually from the umbra to outward.
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