SOLARNET Conference: The Many Scales of the Magnetic Sun

DKIST observations of small-scale, internetwork magnetism in the quiet Sun

8 May 2023, 17:25

15m

Haus H, Telegrafenberg

Oral presentation 1) Latest facilities to observe fundamental processes - space missions, telescopes, and instrumentation Latest facilities to observe fundamental processes - space missions, telescopes, and instrumentation

Speaker

ryan campbell (queen's university belfast)

Description

A new era of solar physics commences with observations of the quiet Sun using the 4-metre Daniel K. Inouye Solar Telescope/Visible Spectropolarimeter (DKIST/ViSP). We present full-Stokes observations at a spatial resolution of 0.1’’, taken during DKIST’s cycle 1 Operations Commissioning Phase, in the Fe I 630.1/630.2 nm and Ca II 854.2 nm lines, allowing us to examine small-scale magnetism in the photosphere and chromosphere. We focus on the photospheric diagnostic and use the Stokes Inversion based on Response functions (SIR) code to invert the Fe I line pair. This allows us to characterize the thermodynamic, kinematic and, crucially, magnetic properties of the pervasive small-scale magnetic features present in the data in the photosphere – namely, constraining their magnetic field strengths, filling factors, and magnetic inclinations. We reveal small-scale magnetic structures, including magnetic bi-poles/loops, in unprecedented detail.

Presentation Materials

DKIST_ppt.pdf