CONAN._classes.load_lightcurves.planet_parameters

CONAN._classes.load_lightcurves.planet_parameters#

CONAN._classes.load_lightcurves.planet_parameters(RpRs=0, Impact_para=0, rho_star=None, Duration=None, T_0=0, Period=0, Eccentricity=None, omega=None, sesinw=None, secosw=None, K=0, verbose=True)#

Define parameters and priors of model parameters. By default, the parameters are fixed to the given values. The parameters can be defined in following ways:

  • fixed value as float or int, e.g Period = 3.4

  • gaussian prior given as tuple of len 2, (mu, std) e.g. T_0 = (5678, 0.1)

  • uniform prior given as tuple of length 3, (min, start, max) e.g. RpRs = (0,0.1,0.2).

if tuple of length 3 is specified for rho_star or Duration, the user can specify whether to use uniform or loguniform. loguniform maybe be preferred for rho_star and Duration priors when the prior range spans different orders of magnitude. (see https://iopscience.iop.org/article/10.3847/1538-3881/ac7f2f)

Users can choose the between Eccentricity-omega or sesinw-secosw parameterization. Note that Eccentricity-omega is still converted to sesinw-secosw for efficient sampling.

Parameters:

  • RpRs (float, tuple;) – Ratio of planet to stellar radius. Default is 0.

  • Impact_para (float, tuple;) – Impact parameter of the transit. Default is 0.

  • rho_star (float, tuple;) – density of the star in g/cm^3. Default is None.

  • Duration (float, tuple;) – Duration of the transit in days. Default is None.

  • T_0 (float, tuple;) – Mid-transit time in days. Default is 0.

  • Period (float, tuple;) – Orbital period of the planet in days. Default is 0.

  • Eccentricity (float, tuple;) – Eccentricity of the orbit. Default is None to use sesinw and secosw parameterization.

  • omega (float, tuple;) – Argument of periastron in degrees. Default is None to use sesinw and secosw parameterization.

  • sesinw (float, tuple,) – √esinw, √ecosw. alternate parameterization of eccentricty and omega. Default is None which fixes both values to 0, which implies Eccentricity=0, omega=90

  • secosw (float, tuple,) – √esinw, √ecosw. alternate parameterization of eccentricty and omega. Default is None which fixes both values to 0, which implies Eccentricity=0, omega=90

  • K (float, tuple;) – Radial velocity semi-amplitude in same unit as the data. Default is 0.

  • verbose (bool;) – print output. Default is True.

_planet_pars#

dictionary of planet parameters for each planet.

Type:

dict

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