Solar faculae observed at Mitaka during the period 1951 - 1991.

Details Solar faculae observed at Mitaka during the period 1951 - 1991. Solar faculae observed at Mitaka during the period 1951 - 1991.

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993rnaoj...2..403i&link_type=abstract

Rep. Natl. Astron. Obs. Jpn., Vol. 2, No. 1, p. 403 - 415

Astronomy and Astrophysics

Astronomy

1

Solar Faculae: Distribution

Scientific paper

The authors analysed solar faculae during the period 1951 - 1991, which were recorded on daily sketches of sunspots by using a 20 cm Zeiss refractor at Mitaka. Faculae in the polar regions (polar faculae) were counted individually, and the authors derived monthly counts of polar faculae. For faculae in lower latitudes (active region faculae), they measured the area covered by the faculae. The authors the constructed a butterfly diagram similar to those for sunspots. It is found that polar faculae appear in the region of low coronal brightness.

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