The Sun as the prime example of stellar structure and evolution.

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Presentation transcript:

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 spectra The 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

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