Oscillations of the sun's chromosphere. III - Simultaneous H-alpha observations from two sites

Details Oscillations of the sun's chromosphere. III - Simultaneous H-alpha observations from two sites Oscillations of the sun's chromosphere. III - Simultaneous H-alpha observations from two sites

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146..192v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 1, May 1985, p. 192-194.

Astronomy and Astrophysics

Astrophysics

9

Chromosphere, H Alpha Line, Solar Oscillations, Spectrum Analysis, Stellar Spectrophotometry, Coherence, Filtergrams, Power Spectra, Solar Flux Density, Temporal Resolution

Scientific paper

The authors analyze time sequences of Hα filtergrams taken simultaneously from two distant observatories, Capri and Izaña. By means of a coherence analysis the authors discriminate between instrumental effects including seeing and truly solar intensity fluctuations. Waves with periods as short as 60 s are present in the solar chromosphere; the lower limit is set by the time resolution of the observations.

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