Table 1.
Summary and comparison of the general properties of petitRADTRANS, the code presented in this paper, and petitCODE, to which petitRADTRANS spectral calculations are compared in Sect. 4.2.
| Property | petitRADTRANS (this paper) | petitCODE (Mollière et al. 2015, 2017) |
|---|---|---|
| Temperature | Parametrized, e.g., Guillot (2010) | Radiative-convective equilibrium |
| Abundances | Parametrized, e.g., vertically constant | Chemical equilibrium, from elemental abundances |
| Scattering | Included for transmission spectra only | Transmission & emission, also during structure iteration |
| Cloud options | Power-law & condensation clouds | Condensation clouds |
| Cloud particle size | fsed and Kzz, or parametrized | fsed and Kzz, or parametrized |
| Particle size distribution | log-normal, width variable | log-normal, width variable |
| Cloud abundance | Parametrized | Ackerman & Marley (2001) or Mollière et al. (2017) |
| Wavelength spacing λ/Δλ | 1000 (correlated-k), 106 (line-by-line) | 10, 50, 1000 (correlated-k) |
| Validity transmission spectra (a) | Clear & cloudy cases | Clear & cloudy cases |
| Validity emission spectra (a) | Clear, from NIR wavelengths on (λ > optical) | Clear & cloudy cases |
Notes. The fsed and Kzz parameters are the mass-averaged ratio of the cloud particle settling speed and the mixing velocity, and the atmospheric eddy diffusion coefficient, respectively, as described in Ackerman & Marley (2001).
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