 Quote by ollo
If I know the temperature of the material I'm looking at and I know which transition I want to look at how can I calculate what the observed flux (in Jansky) should be?
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You need to solve the radiative transfer equation---in particular, finding the
Einstein Coefficients
Quote by ollo
Also, what can I calculate from observed FWHM?
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The width of lines tells you many things concerning the cause of
Line Broadening