Results from two-dimensional spectroscopic observations of solar granulation with a Fabry-Perot interferometer

Details Results from two-dimensional spectroscopic observations of solar granulation with a Fabry-Perot interferometer Results from two-dimensional spectroscopic observations of solar granulation with a Fabry-Perot interferometer

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278..601b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 2, p. 601-606

Astronomy and Astrophysics

Astrophysics

21

Magnetic Flux, Solar Atmosphere, Solar Granulation, Spectrophotometry, Sun, Velocity Distribution, Fabry-Perot Interferometers, Iron, Line Spectra, Solar Spectrometers, Visible Spectrum

Scientific paper

With the two-dimensional spectrometer mounted in the Vacuum Tower Telescope at the Observatorio del Teide/Tenerife, solar granulation was observed in a moderately active region near disk center. Time series of white-light pictures and narrow-band images in the Fe I 6303 line were taken strictly simultaneously. Scanning through the line was accomplished by tuning a Fabry-Perot Interferometer (FPI) to different wavelengths. As the corresponding full width at half maximum of the FPI passband is only 22 mA, the narrow-band filtergrams were used to obtain line profiles for a two-dimensional field of view from which physical information was extracted. The evaluation of the time series presented here was aimed at studying the dynamics of solar granulation. In particular, the investigation of velocity fields in areas with enhanced magnetic flux density and of granules penetrating into high atmospheric layers led to new results.

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