[Star]

This header describes the parent star of the exo-planet. The star_type informs the type of spectral emission density (SED) used in the emission and direct image forward model. The star_type available are:

• blackbody

  • Star with a blackbody SED

  • Class BlackbodyStar

• phoenix

  • Uses the PHOENIX library for the SED

  • PhoenixStar

• custom

  • User-provided star model. See Custom Types

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Blackbody

star_type = blackbody

Star is considered a blackbody.

Keywords

Variable	Type	Description	Default
temperature	float	Effective temperature in K	5000
radius	float	Radius in solar radius	1.0
mass	float	Mass in solar mass	1.0
distance	float	Distance from Earth in pc	1.0
metallicity	float	Metallicity in solar units	1.0
magnitudeK	float	Magnitude in K-band	10.0

Examples

A Sun like star as a black body:

[Star]
star_type = blackbody
radius = 1.0
temperature = 5800

---

PHOENIX

star_type = phoenix

Stellar emission spectrum is read from the PHOENIX library .fits.gz files and interpolated to the correct temperature. Any temperature outside of the range provided by PHOENIX will use a blackbody SED instead. The .fits.gz filenames must include the temperature as the first number. TauREx3 splits the filename in terms of numbers so any text can be included in the beginning of the file name, therefore these are valid:

lte05600.fits.gz  # 5600 Kelvin
abunchofothertext-andanother-here05660-0.4_0.5.0.8.fits.gz #5660 Kelvin
5700-056-034-0434.fits.gz #5700 Kelvin

Keywords

Variable	Type	Description	Default
phoenix_path	str	Path to .fits.gz files	Required
temperature	float	Effective temperature in K	5000
radius	float	Radius in solar radius	1.0
mass	float	Mass in solar mass	1.0
distance	float	Distance from Earth in pc	1.0
metallicity	float	Metallicity in solar units	1.0
magnitudeK	float	Magnitude in K-band	10.0

Examples

A Sun like star using PHOENIX spectra:

[Star]
star_type = phoenix
radius = 1.0
temperature = 5800
phoenix_path = /mypath/to/fitsfiles/