transmission_radius

transmission_radius#

shone.transmission.transmission_radius(wavelength, temperature, pressure, g, R_p0, opacity, vmr, vmr_indices, weights_amu, rayleigh_scattering=True, absorption=True)[source]#

Compute the radius spectrum for planet observed in transmission.

Uses the general formulation for computing transmission spectra in de Wit & Seager (2013) [1]. This function assumes that only H2 and He contribute to Rayleigh scattering.

Parameters:

  • wavelength (array) – Wavelength [µm].

  • temperature (array) – Temperature [K].

  • pressure (array) – Pressure [bar].

  • g (array or float) – Surface gravity [cm/s2].

  • R_p0 (float) – Fiducial planet radius [cm].

  • opacity (array) – Opacities [cm2/g] of shape (N_species, N_pressure, N_wavelength).

  • vmr (array) – Volume mixing ratios for each pressure and each species

  • vmr_indices (array) – Indices of the columns of the vmr FastChem output matrix corresponding to each opacity in opacity.

  • weights_amu (array) – Weights of each species in vmr [AMU].

  • rayleigh_scattering (bool) – Include the contribution to the optical depth from Rayleigh scattering. Default is True.

  • absorption (bool) – Include the contribution to the optical depth from absorption by atoms, ions, and molecules. Default is True.

Returns:

transmission_radius – Transmission radius [cm] as a function of wavelength.

Return type:

array

References

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