Luc Dame
Luc Dame
Luc Dame
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Method: 2D Spectroscopy <br />
• Superimpose a system of fringes on<br />
the coronal image<br />
• Get all the spectral information in<br />
one image:<br />
Fe XIV: 5303 nm (coronal matter, 1.8x10 6 K)<br />
Fe X: 637.4 nm (coronal holes, 1.0x10 6 K)<br />
He I: 587.6 nm (cold matter, 1.0x10 5 K)<br />
• Tilt the F-P to displace the fringe<br />
pattern and improve the spatial<br />
coverage<br />
• Scientific quantities:<br />
Ion densities (from intensities)<br />
Temperatures (line broadening and<br />
comparison with W-L)<br />
Velocities (Doppler shifts)<br />
Turbulence (non thermal velocities)
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