On the Features of the Correlation Time at Different Wave Numbers in the Photosphere

Details On the Features of the Correlation Time at Different Wave Numbers in the Photosphere On the Features of the Correlation Time at Different Wave Numbers in the Photosphere

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sp41b08c&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SP41B-08

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7529 Photosphere, 7859 Transport Processes, 7863 Turbulence

Scientific paper

In many turbulent systems the temperature behaves as a passive scalar advected by velocity field. In some previous works, dedicated to the study of the velocity and intensity patterns at the solar photosphere, it has been evidenced the existence of scaling features and intermittency in the spatial properties of the velocity and dissipation fields. Here, using broad-band intensity images acquired at the French-Italian THEMIS telescope (Canarias - Spain) by the Italian Panoramic Monochromator, we investigate the features of the correlation time τ k at different wave numbers k. The results will be compared with the ones coming from field theoretic renormalization group (RG) applied to the problem of advected passive scalar fields.

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