Examples

Here you can find several examples of simulations with ARTES. Links are provided to the input files with some easy instructions included.

Limb polarization image from a Rayleigh scattering atmosphere

The first example simulates an Stokes I, Q, and U image in backward direction from a Rayleigh scattering atmosphere. The image below is created with the plot_image.py routine in the tools folder. The image shows the Stokes I flux and the vectors denote the direction and degree of polarization. The input files can be downloaded here.

_images/limb_polarization.jpg

Phase curve from a Rayleigh scattering atmosphere

The second example simulates phase curve of a Rayleigh scattering atmosphere. That is, the disk-integrated flux along the different phases (i.e., scattering angles) of the planet. The figures show the Stokes I flux and the fractional polarization. The input files can be downloaded here.

_images/phase_curve_stokes_i.jpg _images/phase_curve_polarization.jpg

Reflected light spectrum from a Jupiter-like planet

The next example simulates a reflected light spectrum at a scattering angles of 90 degrees from a gaseous atmosphere with methane absorption (see Stam et al. 2004). The figures show the spectrum of the normalized Stokes I flux and the degree of polarization (with low spectral resolution). The input files can be downloaded here.

_images/reflected_spectrum_stokes_i.jpg _images/reflected_spectrum_polarization.jpg

Emission spectrum from a self-luminous planet

This example simulates an emission spectrum from a self-luminous gas giant with a clear atmosphere. Molecule opacities and mixing ratios are interpolated from a pre-calculated computed by assuming equilibrium chemistry. The input files can be downloaded here.

_images/emission_spectrum.jpg

Reflected light image of a planet with a circumplanetary ring

This last example simulates a reflected light image at a scattering angles of 90 degrees of a planet that is surrounded by a circumplanetary ring. The image shows the Stokes I surface brightness. The input files can be downloaded here.

_images/circumplanetary.jpg