An analysis of the vertical photospheric velocity field as observed by THEMIS

Details An analysis of the vertical photospheric velocity field as observed by THEMIS An analysis of the vertical photospheric velocity field as observed by THEMIS

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...381..265c&link_type=abstract

Astronomy and Astrophysics, v.381, p.265-270 (2002)

Astronomy and Astrophysics

Astrophysics

6

Sun: Photosphere, Sun: Granulation, Sun: Oscillations

Scientific paper

We propose the application of Proper Orthogonal Decomposition (POD) analysis to the photospheric vertical velocity field obtained through the data acquired by the THEMIS telescope, to recover a proper optimal basis of functions. As first results we found that four modes, which are energetically dominant, are nearly sufficient to reconstruct both the convective field and the field of the ``5-min'' oscillations. Based on observations made with THEMIS-CNRS/INSU-CNR operated on the island of Tenerife by THEMIS S.L. in the Spanish Observatorio del Teide of the Instituto de Astrofisica de Canarias.

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