Mapping solar magnetic fields from the photosphere to the base of the corona
Informazioni aggiuntive
Autori
Ishikawa R.,
Javier T. B.,
Tanausu P. A.,
Okamoto T. J. .,
McKenzie D. E. .,
Auch`ere F.,
Kano R.,
Song D.,
Yoshida M.,
Rachmeler L. A. .,
Kobayashi K.,
Hara H.,
Kubo M.,
Narukage N.,
Sakao T.,
Shimizu T.,
Suematsu Y.,
Bethge C.,
Pontieu B. D. .,
Dalda A. S. .,
Vigil G. D. .,
Winebarger A.,
Alsina Ballester E.,
Belluzzi L.,
Štěpán J.,
Andrés A. R.,
Carlsson M.,
Leenaarts J.
Tipo
Articolo pubblicato in rivista scientifica
Anno
2021
Lingua
Inglese
Abstract
Routine ultraviolet imaging of the Sun's upper atmosphere shows the spectacular manifestation of solar activity; yet we remain blind to its main driver, the magnetic field. Here we report unprecedented spectropolarimetric observations of an active region plage and its surrounding enhanced network, showing circular polarization in ultraviolet (Mg II $h$ & $k$ and Mn I) and visible (Fe I) lines. We infer the longitudinal magnetic field from the photosphere to the very upper chromosphere. At the top of the plage chromosphere the field strengths reach more than 300 gauss, strongly correlated with the Mg II $k$ line core intensity and the electron pressure. This unique mapping shows how the magnetic field couples the different atmospheric layers and reveals the magnetic origin of the heating in the plage chromosphere.
Rivista
Science Advances
Volume
7
Numero
8
Pagina inizio
eabe8406
Parole chiave
irsol-refereed-scientific-papers
