The Sun as the prime example of stellar structure and evolution.
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The Sun as the prime example of stellar structure and evolution
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Transcript of The Sun as the prime example of stellar structure and evolution.
The Sun as the prime example of stellar structure and evolution
The Sun
Close-up of a G2 Main Sequence Star
Stellar Interior
The Solar Interior…the prime application of the equations of stellar
structure
Density in the solar interior
Temperature in the Solar Interior
The “Faint Young Sun Paradox”
The Neutrino Sun
Solar Neutrino Experiments
Helioseismology: Eigenmodes of the Sun
The Solar Atmosphere
Layers of the Solar Atmosphere
• Photosphere
• Chromosphere
• Corona
Granules in the Solar
Atmosphere
The Chromosphere-region of partially ionized hydrogen
The Solar Corona
What is it? How did it get that way?
Corona shines at level of one millionth the photosphere. It is Thompson scattered
sunlight
To understand astronomical objects, astronomers take
spectraThe spectrum of the corona reveals
its most interesting characteristic
The dominant ionization state depends on the temperature…
example N
The X-Ray Sun
The Temperature Profile in the Solar Atmosphere
The key to understanding the corona is the solar magnetic field
Above the corona: direct magnetometer measurements
in the solar wind
The Flowing Medium of the Solar Wind
