Spectra

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Spectrogram 2-40 A for varying temperature
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Spectra
or,

• this is how we find out what everything is made of

or,
What is Hosung up to?
Vinay Kashyap Smithsonian Astrophysical
Observatory
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SOLAR CHROMOSPHERE He II Si XI 304 A 70 kK 1
MK SOHO/EIT
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SOLAR CORONA Fe XV 284 A 2 MK SOHO/EIT
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SOLAR CORONA Fe XII 195A 1.5 MK SOHO/EIT
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SOLAR CORONA Fe IX 171 A 1.2 MK SOHO/EIT
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Wavelength Energy Flux Spectrum Atoms Ions
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Simplified H atom Energy levels Spectral lines
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Line intensity Level population Ion
balance Abundance Atomic emissivity DEM
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Continuum Processes
Bremsstrahlung free-free
Radiative Recombination free-bound
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Spectrogram 2-40 A for varying temperature
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Summary of coronal structure Fredholm integral
of first kind
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Dan Rather has never shown a spectrum on the
CBS Evening News.
Ed Weiler
NASA Associate Director