Seminars and Colloquia

Recent Developments of Solar Imaging Spectrographs in KoreaAstrophysics Seminar

by Heesu Yang (Korea Astronomy and Space Science Institute)

Asia/Kolkata
Auditorium

Auditorium

Description

Abstract

Imaging spectroscopy is a key technique for understanding the dynamics and energetics of the solar atmosphere. In this talk, I will present recent progress in the development of solar spectroscopic instruments for chromospheric observations in Korea. The Fast Imaging Solar Spectrograph (FISS), installed on the 1.6-meter Goode Solar Telescope at the Big Bear Solar Observatory, enables rapid two-dimensional imaging spectroscopic data of chromospheric bands such as Hα and Ca II by scanning the field of view with a single slit, providing insights into small-scale dynamics and transient energy-release processes. We are currently planning to upgrade the FISS to achieve a larger field of view and triple-band observations using a multi-slit configuration. The Solar Full-Disk Hα Telescope (Challan) has been developed to continuously monitor the solar full disk for large-scale chromospheric activity. This telescope will monitor solar activity and provide complementary observations to high-resolution but small-field-of-view instruments. Finally, I will introduce a new conceptual instrument currently under study, the Solar Integral-Field Dynamic Spectrometer (SOLARIS-Hα), which is proposed as part of the payload for the upcoming L4 mission. It aims to investigate the dynamic Hα spectrum of the Sun to understand magnetic reconnection and particle acceleration by acquiring Hα spectra across the solar full disk with a 33×33 spatial sampling at sub-second cadence.