Information entropy in solar atmospheric fields. I. Intensity photospheric structures

Details Information entropy in solar atmospheric fields. I. Intensity photospheric structures Information entropy in solar atmospheric fields. I. Intensity photospheric structures

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...402.1115c&link_type=abstract

Astronomy and Astrophysics, v.402, p.1115-1127 (2003)

Astronomy and Astrophysics

Astrophysics

7

Sun: Photosphere, Sun: Granulation, Methods: Statistical

Scientific paper

The existence of a quasi-regular pattern in solar photospheric convective fields is an open question. In the present work, this problem is quantitatively approached by means of the normalised information entropy measure H'(r) as introduced by Van Siclen (\cite{VanSic97}), which reports on the information content at different scales. Images were acquired at the THEMIS telescope of the European Northern Observatory by the IPM observing mode, and at the Richard B. Dunn Solar Telescope of the National Solar Observatory. The evaluation of H'(r) in the case of photospheric intensity binarized images shows the presence of maxima which are evidence of different prominent scales in the photospheric pattern. The relative positions of these maxima defines an ordering scale ~ 1.6 Mm in both instantaneous and average images. This is read as the evidence of a spatio-temporal organization in the evolution of convective pattern. The emergence of an ordering scale is discussed in the framework of pattern formation in random systems and in connection with the findings of previous works. By averaging images with time, an increase of the information content characterized by a coherence time of ~ 1 h is observed in the range of scales from 5.0 Mm to 10.0 Mm.

Affiliated with

Also associated with

No associations

Rating

Information entropy in solar atmospheric fields. I. Intensity photospheric structures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Information entropy in solar atmospheric fields. I. Intensity photospheric structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information entropy in solar atmospheric fields. I. Intensity photospheric structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1366156