Measurement of the evolution of the magnetic field of the quiet photosphere during a solar cycle

The solar photosphere is filled by a magnetic field which is tangled on scales much smaller than the resolution capability of solar telescopes. This hidden magnetic field can be investigated via the Hanle effect. In 2007 we started a synoptic program to explore if the magnetic flux of the quiet phot...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2017-09
Main Authors: Ramelli, Renzo, Bianda, Michele, Berdyugina, Svetlana, Belluzzi, Luca, Kleint, Lucia
Format: Article
Language:English
Subjects:
Magnetic fields
Magnetic flux
Photosphere
Solar cycle
Solar magnetic field
Space telescopes
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The solar photosphere is filled by a magnetic field which is tangled on scales much smaller than the resolution capability of solar telescopes. This hidden magnetic field can be investigated via the Hanle effect. In 2007 we started a synoptic program to explore if the magnetic flux of the quiet photosphere varies with the solar cycle. For this purpose we applied a differential Hanle effect technique based on observations of scattering polarization in C\(_2\) molecular lines around 514.0 nm, taken generally every month. Our results now span almost one complete solar cycle.
ISSN:2331-8422