Thursday 13 Jul 2017: The Hot, Magnetic and Happening Solar Atmosphere
Prof. Durgesh Tripathi - IUCAA, India
The problem of existence of a hotter atmosphere above a cool one and different dynamic phenomena seen in the atmosphere has posed great challenges to the solar physics community. Magnetically dominated solar atmosphere consists of a variety of features such as active regions, coronal loops, bright points etc. Therefore, understanding the physics of different kinds of structures are the key to understanding the heating and dynamics. The recent observations from Hinode, and Solar Dynamics Observatory have presented us with unprecedented observations helping us to measure physical quantities in the solar corona and study the dynamics. Additionally, the Sun’s UV and X-ray radiation from the upper atmosphere has direct impact on the dynamics of the Earth’s atmosphere, climate and space weather. In this talk, I shall present some of the recent observational results and their implications on heating and dynamics of solar atmosphere. If time time permits, I shall describe the Solar ultraviolet Imaging Telescope (SUIT) on board Aditya-L1 mission that will be launched in 2020. The goal of SUIT is to address the origin of the radiation in near ultraviolet wavelength range (2000 - 4000 A), which governs the chemistry of oxygen and ozone in the Earth's atmosphere.