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Hi ken, I was thinking about how to maximise contrast of solar granulation and was thinking about how the blackbody radiation might be different across each granule.
I plotted the blackbody radiation curves for 5500k and 4500k ( assuming these values are representative of the centre and esge of each granulation) as well as the ratio between the two as a function of wavelength.
It looks to me that the biggest ratio and therefore contrast for contiuum would be at the shortest wavelengths. But recommendations in solar observing literature is for an orange filter to improve seeing ( less refraction) or green ( eg the baader solar continuum filter to be used with baader solar safe film.).
I guess my simple model needs an additional term for the amount of atmospheric scattering as a function of wavelength.
Any thoughts?
Cheers, Hamish
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