Bibcode
Guglielmino, S. L.; Martínez Pillet, V.; Ruiz Cobo, B.; Zuccarello, F.; Lites, B. W.
Referencia bibliográfica
Memorie della Società Astronomica Italiana Supplement, v.9, p.103 (2006)
Fecha de publicación:
0
2006
Número de citas
4
Número de citas referidas
4
Descripción
In order to improve the understanding of the process of emergence of
magnetic flux on the solar surface, we studied the temporal evolution of
an ephemeral region using emph{Advanced Stokes Polarimeter} data. We
adopted two different approaches: first, we used a Milne-Eddington
inversion to obtain mean parameters of the emerging bipole magnetic
configuration. Then, we considered the full radiative transfer equation,
and we studied the trend of all the previous parameters as a function of
the optical depth tau . We pointed out peculiar flows, such as an
initial upflow of 1.5 ;textrm {km s}-1 where the zenith angle
is essentially horizontal, and downflows decreasing in time in
footpoints, characterized by a vertical field. These results seem to
confirm the emerging bipole topology, due to magnetic flux tube
emergence. The results obtained with this inversion confirm the
structure found with Milne-Eddington code. However we found regions in
which the presence of two distinct magnetic components is highly
significant. It also seems very interesting the trend of the temperature
with optical depth: the plasma temperature appears to grow up in the
high photosphere above the emerging bipole.