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Astronomy and Astrophysics Supplement Series, Vol. 119, October II 1996, 205-210
Magnetic configuration of a sunspot region using the H
line
Hongqi Zhang
Beijing Astronomical Observatory, Chinese Academy of Sciences Beijing 100080, China
Received June 6, 1995; accepted February 12, 1996
Abstract:
The configuration of the magnetic field in an active region is analysed using a set of H
chromospheric magnetograms
and narrow pass-band filtergrams taken at various
positions on the line.
We found that the chromospheric magnetic field is
parallel to the chromospheric features and
inhomogeneous.
The photospheric magnetic field disappears abruptly in the edge of the
penumbra; the chromospheric field extends beyond the penumbral boundary
with an inclination of about 
to the solar surface.
Chromospheric superpenumbral filaments show a
good correlation with the chromospheric magnetic field
and their configurations are related to the
photospheric magnetic structures
nearby the sunspot.
Part of the magnetic flux of the sunspot returns
to the neighbouring enhanced networks, which
is almost vertical to the solar surface.
Key words: Sun: magnetic fields; chromosphere; sunspots
web@edpsciences.com
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