Overview of the Sun Jie Zhang Art Poland

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Presentation transcript:

Overview of the Sun Jie Zhang Art Poland CSI 769/ ASTR769 Fall 2005 Lecture 01 Aug. 30, 2005 Overview of the Sun Jie Zhang Art Poland The Sun is the ultimate and often immediate driver of the space weather

Today’s Sun http://lasco-www.nrl.navy.mil/rtmovies.html

Today’s Sun http://lasco-www.nrl.navy.mil/rtmovies.html

What will be covered in the solar end? Structure of the Sun Magnetic field of the Sun Activity of the Sun

Structure of the Sun (4) Corona (3) Transition Region between Corona and Chromosphere (2) Chromosphere (1) Photosphere Solar Atmosphere surface (3) Convection Zone (2) Radiative Zone (1) Core Inside the Sun

Structure of the Sun

Magnetic Field of the Sun Helio-seismology Surface magnetic field Sunspot Magnetogram Zeeman Effect Hale’s polarity law Solar Cycle Sunspot cycle Butterfly diagram Solar activity cycle Solar Dynamo Differential rotation Dynamo theory SOHO/MDI

Butterfly Diagram

Activity of the Sun Flares In all wavelengths Classification Flare model Coronal Mass Ejections E, K, F corona Streamer CMEs Models Energetic Particle Events Impulsive & Gradual Particle Acceleration Magnetic Reconnection

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