Abstract

Splinter: Solar

Variation of Small-Scale Solar Magnetic Fields with Hinode

Jonathan Roberts, Ricky Egeland, and Rebecca Centeno
UCAR, HAO, and the University of Florida

Since 2008 the Hinode spacecraft has been taking monthly synoptic high-resolution spectropolarimetric observations of the central meridian of the Sun. This data provides routine observations of small-scale magnetism from pole to pole. In this project we search this unique dataset for variation of the small-scale magnetic field from one solar minimum to the next. By doing so, we investigate whether the small-scale magnetism varies in the same time scales as the large-scale magnetic field, which is still an unanswered question. If detected, could be evidence of a connection between the large-scale solar dynamo on local dynamo action, which is shown in simulations. As of now, we have a magnetic butterfly diagram covering the period from June 2008 to March 2020. The multi-scale connection could have consequences for the overall magnetic behavior of the Sun during periods of extended low activity such as the Maunder Minimum of 1645–1715, and on the solar irradiance and Earth climate during these periods.