[P-EM14] Frontiers in solar physics

[PEM14-02] FOXSI-4 Sounding Rocket Experiment: Solar Flare X-ray Focusing-Imaging Spectroscopic Observation

★Invited Papers

*Noriyuki Narukage^1,2, Shin Watanabe³, Tadayuki Takahashi^4,5, Shunsaku Nagasawa^4,5, Takahiro Minami⁵, Riko Shimizu², Yoshiaki Sato², Taro Sakao³, Sota Kashima³, Ikuyuki Mitsuishi⁶, Koki Sakuta⁶, Kazuki Ampuku⁶, Ryuto Fujii⁶, Lindsay Glesener⁷, Athanasios Pantazides⁷, Kristopher Cooper⁷, Yixian Zhang⁷, Juan Camilo Buitrago-Casas⁸, Juan Carlos Martinez Oliveros⁸, Hunter Kanniainen⁸, Savannah Perez Piel⁹, Tamar Ervin⁹, Orlando Romeo⁹, Sasha Courtade⁹, Wayne Baumgartner¹⁰, Stephen Bongiorno¹⁰, Patrick R. Champey¹⁰, Steven Christe¹¹, Eliad Peretz¹¹, Juliana Therese Vievering¹², Daniel Ryan¹³, Sam Krucker¹³, Kanya Kusano¹⁴ (1.National Astronomical Observatory of Japan, 2.The Graduate University for Advanced Studies, SOKENDAI, 3.Japan Aerospace Exploration Agency, 4.Kavli IPMU, 5.The University of Tokyo, 6.Nagoya University, 7.University of Minnesota Twin Cities, 8.Space Sciences Laboratory, 9.University of California Berkeley, 10.NASA Marshall Space Flight Center, 11.NASA Goddard Space Flight Center, 12.Johns Hopkins University Applied Physics Laboratory, 13.University of Applied Sciences and Arts Northwestern Switzerland FHNW, 14.Institute for Space-Earth Environmental Research, Nagoya University)

Keywords:solar flare, magnetic reconnection, plasma heating, particle acceleration, imaging spectroscopy, X-rays

FOXSI-4 is a sounding rocket experiment to achieve the world's first solar flare X-ray focusing-imaging spectroscopic observation. The scientific objective of this experiment is to understand the mechanisms of energy release, energy conversion, and energy propagation in a solar flare driven by magnetic reconnection. The spatially and temporally resolved spectra in the soft to hard X-ray bands obtained by the FOXSI-4 allow detailed survey and diagnostics for plasmas heated to super-hot temperatures and accelerated electrons.
Since the observation time of the sounding rocket experiment was limited to about 5 minutes, it was almost impossible to observe solar flares, whose occurrence is difficult to predict. Thus, by monitoring the solar activity in real-time, the FOXSI-4 will be launched as soon as a flare occurs. In addition, to observe a large-scale flare, flare size will be predicted based on measured vector magnetic field data. The FOXSI-4 is planned to be launched in April 2024, together with the other sounding rocket of Hi-C FLARE, which will take high-spatial resolution EUV images.
In this presentation, an overview of the FOXSI-4 project is introduced and preliminary observation results are reported.