Possible Connection Between Umbral and Bright Point Oscillations

Details Possible Connection Between Umbral and Bright Point Oscillations Possible Connection Between Umbral and Bright Point Oscillations

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0909a&link_type=abstract

American Astronomical Society, SPD meeting #40, #9.09; Bulletin of the American Astronomical Society, Vol. 41, p.818

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Scientific paper

Active region NOAA 10794 was observed using the Rapid Dual Imager (RDI) instrument on the Dunn Solar Telescope at the National Solar Observatory, Sacramento Peak. G-band and H-alpha filters were employed for the observations, and the resulting data were subjected to both speckle reconstruction and wavelet analyses.
Intensity oscillations in the period range 8--584 s were detected. Those with frequencies near the Nyquist value of 125 mHz had a similar behavior to other oscillations detected in the period range of 8 - 60 s.
However, oscillations in the range around 180s observed above bright points show a temporal coincidence in the light curve shape and the number of the emitted frequencies in an umbral flash, indicating a possible connection.

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