A new determination of the mean lifetime of bright and dark chromospheric mottles

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Sun: Chromosphere

Scientific paper

We determined the lifetime of dark and bright mottles of the solar chromosphere using a more accurate method proposed by Alissandrakis et al. (1987). Our study is based on an excellent sequence of photographs taken at the Pic-du-Midi Observatory. We found that the mean lifetime of both bright and dark mottles is 13-14 min. We discuss this result and we compare it with previous investigations.

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