Observation of 3D magnetic field dynamics in the solar atmosphere by the Sunrise III balloon-borne telescope

勝川 行雄　教授（Dr. Yukio KATSUKAWA）
国立天文台（NAOJ）

Magnetic fields in the solar atmosphere are the driving source of hot coronae, solar winds, and flares and are fundamental information as a boundary condition of the heliosphere. Because magnetic structures pervading photosphere-chromosphere-corona drastically change their configuration, it is demanded to observationally obtain magnetic fields directly by a highly sensitive and broad wavelength spectro-polarimetric observation. To do it, we built the Sunrise III balloon-borne solar telescope, which was the third flight of the international stratospheric balloon project Sunrise. It carried a 1-meter aperture telescope and provided a unique platform to perform seeing-less observations at UV-Visible-IR wavelengths. Our group developed a near-infrared instrument called SCIP (Sunrise Chromospheric Infrared spectroPolarimeter) to observe many spectral lines sensitive to magnetic fields in both photosphere and chromosphere with a high angular resolution of 0.2" which is higher than that of the HINODE Solar Optical Telescope. Sunrise III conducted a successful 6.5-day flight in July 2024, capturing unprecedented data on the solar atmosphere and magnetic fields for various targets including quiet regions, sunspots, an emerging flux region, and a flare. In this talk, we overview the instrument development of Sunrise III and present a preliminary report of the data obtained during the flight.

Conference Room A (1257) (2nd floor/ New Building A),　Via Zoom