dc.contributor.author |
Bianda, M |
|
dc.contributor.author |
Ramelli, R |
|
dc.contributor.author |
Anusha, L. S |
|
dc.contributor.author |
Stenflo, J. O |
|
dc.contributor.author |
Nagendra, K. N |
|
dc.contributor.author |
Holzreuter, R |
|
dc.contributor.author |
Sampoorna, M |
|
dc.contributor.author |
Frisch, H |
|
dc.contributor.author |
Smitha, H. N |
|
dc.date.accessioned |
2011-06-01T10:06:30Z |
|
dc.date.available |
2011-06-01T10:06:30Z |
|
dc.date.issued |
2011-06 |
|
dc.identifier.citation |
Astronomy & Astrophysics, Vol. 530, L13 |
en |
dc.identifier.uri |
http://hdl.handle.net/2248/5488 |
|
dc.description.abstract |
Chromospheric magnetic fields are notoriously difficult to measure. The chromospheric lines are broad, while the fields are producing a minuscule Zeeman-effect polarization. A promising diagnostic alternative is provided by the forward-scattering Hanle effect, which can be recorded in chromospheric lines such as the He i 10 830 Å and the Ca i 4227 Å lines. We present a set of spectropolarimetric observations of the full Stokes vector obtained near the center of the solar disk in the Ca i 4227 Å line with the ZIMPOL polarimeter at the IRSOL observatory. We detect a number of interesting forward-scattering Hanle effect signatures, which we model successfully using polarized radiative transfer. Here we focus on the observational aspects, while a separate companion paper deals with the theoretical modeling. |
en |
dc.language.iso |
en |
en |
dc.publisher |
EDP Sciences |
en |
dc.relation.uri |
http://dx.doi.org/10.1051/0004-6361/201117047 |
en |
dc.rights |
© ESO |
en |
dc.subject |
Magnetic fields |
en |
dc.subject |
Polarization |
en |
dc.subject |
Scattering |
en |
dc.subject |
Sun: chromosphere |
en |
dc.title |
Observations of the forward scattering Hanle effect in the Ca I 4227 Å line |
en |
dc.type |
Article |
en |