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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 3.

Model spectra and simulations of JWST data. The top and middle panels show model spectra (R~2700) including CH3D and HDO, respectively, for a 250 K object (4–5 MJ, 2 Gyr). Model spectra include no D, protosolar D/H (2 × 10−5), and 5× enhanced D/H (10 × 10−5). Simulated data for a 2.5 hr observation (assuming a distance of 10 pc) with JWST are shown as black points with error bars. The bottom panel shows how changing spectral resolution changes the CH3D feature for R ∼ 2700, R ∼ 1000, and R ∼ 300.

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