1st Open Sunrise III Science Meeting: Data Release and Science Projects

Session

Day 2: Session 2

3 Jun 2026, 11:00

KIS, Freiburg

Conveners

Day 2: Session 2

• Ryohtaroh Ishikawa (National Institute for Fusion Science)

36. Toward understanding magneto-convective regimes in active regions

Jan Jurcak (Astronomical Institute of the CAS)

03/06/2026, 11:00

Science Meeting

Invited

The solar photosphere is shaped by the interplay between convection and magnetic fields, producing a rich variety of structures in active regions. While granulation represents the fundamental convective pattern of the quiet Sun, magnetic field in active regions gives rise to distinct magneto-convective regimes, each defined by a different balance between plasma motions and magnetic forces....

29. Chromospheric Dynamics of an Umbral Flare Kernel - Based on Coordinated SUNRISE III SCIP and Domeless Solar Telescope Observations

Ayumi Asai (Astronomical Observatory, Kyoto University)

03/06/2026, 11:15

Science Meeting

We report imaging spectroscopic observations of an M1.4 solar flare obtained during a coordinated observation between SUNRISE-III/SCIP and Domeless Solar Telescope (DST) at Hida Observatory, Kyoto University.
The flare that occurred on 2024 July 13 in NOAA Active Region 13738 exhibited a compact flare kernel located within a sunspot umbra.
SCIP performed rapid slit-scan observations over a...

17. Chromospheric Spectropolarimetric Evidence of Magnetic Portals in Quiet-Region Flux Tubes Revealed by SUNRISE-3/SCIP

Takayoshi Oba (Advanced Research Center for Space Science and Technology (ARC-SAT), Institute of Science and Engineering, Kanazawa University)

03/06/2026, 11:30

Science Meeting

Acoustic waves propagate into the chromosphere and upper atmosphere, contributing significantly to energy transport and dynamics. Their upward propagation, however, is restricted to frequencies above the acoustic cutoff frequency, which depends on atmospheric conditions. In particular, the magnetic field configuration plays a key role, as the cutoff frequency is reduced in regions where the...

11. Exploring spatially highly resolved Stokes V profiles from Sunrise-III/SUSI

Johannes Hoelken (MPS)

03/06/2026, 11:45

Science Meeting

High-resolution broad-band observations of the Sun reveal a multitude of small-scale structures, everywhere in the photosphere. The increase in resolution usually comes with the cost of increased noise and decreased polarimetric signal.
In this contribution we present an approach inspired by stellar astrophysics, in particular the study of stellar magnetism. We use least-squares deconvolution...

21. Sunspot structure across photospheric and low chromospheric layers

Azaymi L. Siu-Tapia (Instituto de Astrofísica de Andalucía (IAA-CSIC))

03/06/2026, 12:00

Science Meeting

We analyze high-resolution spectropolarimetric observations from TuMag/SUNRISE III in the Fe I 5250.2 Å and Mg I b2 5173 Å lines to investigate how sunspot properties change from the photosphere to the low chromosphere, a transition layer characterized by key changes in the thermal, dynamic, and magnetic structure of the solar atmosphere.
We perform a comparative analysis using both spectral...

53. High-order hydrogen Paschen emission lines observed with SCIP

Haocheng Yu (NAOJ)

03/06/2026, 12:15

Science Meeting

We report the detection of high-order hydrogen Paschen emission lines (Pa~15, Pa~16, and Pa~17) in the quiet-Sun chromosphere off the solar limb using the Chromospheric Infrared SpectroPolarimeter (SCIP) on board the SUNRISE balloon telescope. These lines reveal thread-like structures resembling spicules and exhibit systematically smaller Doppler velocities than Ca II 854.2 nm, indicating that...