Colloquium on Apr. 11, 2025

Investigations of Solar Activities of Various Scales in Both Theory and Observation

Speaker: Jun Lin (YNO)

Venue: SWIFAR Building 2111

Time: 16:00 PM, Friday, Apr. 11, 2025

Abstract:

The Sun is a star that is closest and most important to us in the universe. It provides us 90% energy we need everyday and impact our life in various fashion. Solar physics is a fundamental discipline dedicated to studying the physical property of the Sun and solar activities. It is of the true time-domain astronomy. Solar activities include the following phenomena: sunspot, facula, plages, prominence, solar flare, eurptive prominence, and corona mass ejection. The last three phenomena involve the rapid energy release, which is the most energetic phenomenon in the solar system. All these activities are tighly related to the magnetic field, the structure of magnetic field, and their evolution. They usually impose severel disturbance to the environment around the Earth, even to our modern daily life that depends  in an important way on the electric power system, communications, fast transportations, and so on. About 70% resources of the solar community in the world is invested in studying the solar eruption. I am going to introduce what we are doing on the solar activities at the Yunnan Astronomical Observatories, what kind of approaches we are using to perform our studies, and how we applied theories and techniques to investigations of magnetic activities that take place in the other environments of the universe.