Kevin Heng coauthored a reanalysis of exoplanet transmission spectra with Daniel Kitzmann. Their work identifies degeneracies among reference radius, reference pressure and inferred absorber abundance. A precise spectral fit therefore need not uniquely determine every atmospheric parameter.[ref]
The theory of transmission spectra revisited by Kevin Heng and Daniel Kitzmann. author list and the described study’s abstract or introductory account
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