Science Objectives of the Solar-C_EUVST

Solar-C_EUVST (EUV High-Throughput Spectroscopic Telescope) is designed to answer how stellar plasma are created and evolve, and how the Sun influences the Earth and other planets in our solar system. The proposed mission is designed to comprehensively understand the energy and mass transfer from the solar surface to the solar corona and interplanetary space, and to investigate the elementary processes that take place universally in cosmic plasmas. The two primary science objectives for Solar-C_EUVST are : I) Understand how fundamental processes lead to the formation of the solar atmosphere and the solar wind, II) Understand how the solar atmosphere becomes unstable, releasing the energy that drives solar flares and eruptions. Solar-C_EUVST will, A) seamlessly observe all the temperature regimes of the solar atmosphere from the chromosphere to the corona at the same time, B) resolve elemental structures of the solar atmosphere with high spatial resolution and cadence to track their evolution, and C) obtain spectroscopic information on the dynamics of elementary processes taking place in the solar atmosphere. In this talk, we will first introduce the science targets of the Solar-C_EUVST, and then discuss in detail the topics related to the flares such as hot plasmas in magnetic reconnection region.