Determination of the mean lifetime of solar features from photographic observations

Details Determination of the mean lifetime of solar features from photographic observations Determination of the mean lifetime of solar features from photographic observations

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...174..275a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 174, no. 1-2, March 1987, p. 275-280. Research supported by the Greek General

Mathematics

Probability

13

Astronomical Photography, Solar Granulation, Life (Durability), Probability Density Functions

Scientific paper

Two approaches, one based on a lifetime distribution and the second based on survival functions, are combined in order to determine the mean lifetimes of solar features. The relations between the lifetime distributions and the survival and probability density functions are derived. This method is applied to the determination of the mean lifetimes of solar granules. The accuracy of the method is evaluated by comparing the calculated lifetimes with data obtained using different methods. It is determined that the proposed method provides accurate lifetime data, and a mean lifetime value of 16 min with a standard deviation of about 5 min was obtained for the solar granules.

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