Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..255k&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 2, p. 255-261.
Astronomy and Astrophysics
Astrophysics
2
Faculae, Magnetic Signatures, Photosphere, Solar Magnetic Field, Sunspots, Solar Atmosphere, Solar Limb
Scientific paper
Two solar facular regions were investigated using the Solar Vector Magnetograph of the Okayama Astrophysical Observatory. The transverse magnetic field of the faculae becomes more parallel to the solar radius as the facular region moves from the disk center to the limb. This center-to-limb variation can be explained by a numerical simulation in which the direction of facular magnetic fields is confined within a cone around the vertical. A suitable cone angle is about 30 deg. This confinement leads to the possibility of calibrating a magnetograph measurement by considering the center-to-limb variation of the longitudinal and transverse magnetic fields.
Kawakami Singo
Makita Mitsugu
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