Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...336l..57a&link_type=abstract
Astronomy and Astrophysics, v.336, p.L57-L60 (1998)
Astronomy and Astrophysics
Astrophysics
16
Sun: Chromosphere, Corona
Scientific paper
We present a comparative analysis of the chromospheric solar limb prolateness, using strictly simultaneous H_alpha ground-based observations and Heriptsize{II} space-based observations. The typical prolateness is found to be Delta D/D=5.5*E(-3) in Heriptsize{II} and 1.2*E(-3) in H_alpha . The first measurements in the 30.4 nm Heriptsize{II} line over a period of two years, as well as coronal data, are discussed to explore further the origin of the prolateness and its possible consequences.
Artzner Guy E.
Auchere Frédéric
Boulade Sebastien
Delaboudinière Jean Pierre
Georgakilas A. A.
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