Bibcode
Guglielmino, S. L.; Zuccarello, Francesca
Referencia bibliográfica
The Astrophysical Journal Letters, Volume 743, Issue 1, article id. L9 (2011).
Advertised on:
12
2011
Número de citas
5
Número de citas referidas
5
Descripción
We investigate signatures of siphon flows in a region around a solar
magnetic pore, observed in the photosphere at μ = 0.6, during its
decay phase. We analyze high-resolution Stokes spectra acquired by
Hinode/Solar Optical Telescope along the Fe I pair at 630.2 nm. We
determine the vector magnetic field and the line-of-sight velocity by an
inversion of the full Stokes vector using the SIR code. We also analyze
photospheric G-band filtergrams. We find evidence of a transient siphon
(counter)flow at the edge of the pore. An arch-shaped structure is found
to have upflow motions of 4 km s-1 in the footpoint
with a stronger magnetic field and positive polarity, and downflows of
the same order of magnitude in the footpoint with opposite polarity and
a weaker magnetic field. The event is different from those reported in
previous observations of the Sun's atmosphere and may represent a
physical constraint for numerical models.
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