Dynamics and structure of supergranulation

D. Del Moro, F. Berrilli, T. L. Duvall, A. G. Kosovichev

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

In this paper we investigate the temporal evolution and geometric properties of solar supergranular features. For this purpose we apply an automatic feature-tracking algorithm to a 6-day time series of 18 near-surface flowmaps (Duvall and Gizon, 2000) containing 548 target objects. Lifetimes are calculated by measuring the time elapsing between the birth and death of each target. Using an exponential fit on the lifetime distribution of single supergranules we derived a mean lifetime of 22 hours. Based on the application of segmentation numerical procedures, we estimated characteristic geometric parameters such as area distributions of supergranular cells. We also derive the relationship between measured lifetime and the area of the supergranules.

Original languageEnglish (US)
Pages (from-to)23-32
Number of pages10
JournalSolar Physics
Volume221
Issue number1
DOIs
StatePublished - May 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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