SOLARNET Conference: The Many Scales of the Magnetic Sun

Changes in the Lower Solar Atmosphere throughout the Solar Cycle

12 May 2023, 09:00

15m

Haus H, Telegrafenberg

Oral presentation 4) Variations of magnetic fields with the solar cycle – synoptic observations and Theory Variations of magnetic fields with the solar cycle – synoptic observations and Theory

Speaker

James Crowley (National Solar Observatory; University of Colorado, Boulder)

Description

The change in the distribution of the magnetic field in the quiet Sun photosphere over the solar cycle could be expected to cause systematic variations in the photospheric thermodynamic structure. This could be due to changes in the dynamics of the convective overshoot or radiative properties. To look for such changes, we use high spatial and spectral resolution spectropolarimetric observations obtained by Hinode SOT and apply the Spectropolarimetric Inversions Based on Response Functions (SIR) code to infer physical conditions in the lower solar photosphere. By using multiple homogeneous datasets acquired over 15 years, we analyze the distributions of the inferred parameters in the granules and intergranules of magnetic and non-magnetic spectra throughout the solar cycle. The final goal of our study is to characterize changes in the inferred atmospheric parameters, notably, the temperature structure, the line-of-sight velocities, and magnetic properties.