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Measuring the D/H Ratios of Exoplanets and Brown Dwarfs

  • Authors: Caroline V. Morley, Andrew J. Skemer, Brittany E. Miles, Michael R. Line, Eric D. Lopez, Matteo Brogi, Richard S. Freedman, and Mark S. Marley

2019 The Astrophysical Journal Letters 882 L29.

  • Provider: AAS Journals

Caption: Figure 2.

Molecular opacity cross sections for various species. The top panel shows cross sections for molecules important in cold brown dwarf atmospheres (T = 225 K, P = 1 bar). Cross sections are scaled by the abundance in chemical equilibrium, assuming D/H = 2 × 10−5. The bottom panel shows the cross section of H2O at P = 1 bar and temperatures from 200 to 2400 K. Colder temperatures lead to larger amplitudes in molecular opacity.

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