Bibcode
Bonet, J. A.; Ponz, J. D.; Vazquez, M.
Bibliographical reference
Solar Physics, vol. 77, Apr. 1982, p. 69-75.
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4
1982
Journal
Citations
14
Refereed citations
13
Description
The width distribution of the penumbral filaments is estimated using
white light photographs obtained with a vacuum, Newtonian type
telescope. Observations were made during the solar eclipse of June 1973
in order to allow simultaneous recording on each frame of the moon limb
crossing on the photosphere, as well as the sunspot and penumbra of
interest. The relevant parameter, filament width, is defined as the sum
of the segments obtained by drawing a vertical line through a relative
maximum, the tangents to the profile in adjacent minima, and horizontal
lines through the mean points of the segments. The width distribution
results from joint analysis of the selected areas. The mean value of the
width of penumbral filaments was estimated to be 0.37 arcsec.