Wagg2022#
- class cogsworth.sfh.Wagg2022(tsfr=<Quantity 6.8 Gyr>, alpha=0.3, Fm=-1, gradient=<Quantity -0.075 1 / kpc>, Rnow=<Quantity 8.7 kpc>, gamma=0.3, zsun=0.0142, galaxy_age=<Quantity 12. Gyr>, **kwargs)[source]#
Bases:
CompositeStarFormationHistoryA semi-empirical model defined in Wagg+2022 (see Figure 1 and Section 2.2.1 for a detailed explanation.), heavily based on Frankel+2018.
Parameters are the same as
StarFormationHistorybut additionally with the following:- Parameters:
- galaxy_age
Quantity[time], optional Maximum lookback time, by default 12*u.Gyr
- tsfr
Quantity[time], optional Star formation timescale, by default 6.8*u.Gyr
- alphafloat, optional
Disc inside-out growth parameter, by default 0.3
- Fmint, optional
Metallicity at centre of disc at tm, by default -1
- gradient
Quantity[1/length], optional Metallicity gradient, by default -0.075/u.kpc
- Rnow
Quantity[length], optional Radius at which present day metallicity is solar, by default 8.7*u.kpc
- gammafloat, optional
Time dependence of chemical enrichment, by default 0.3
- zsunfloat, optional
Solar metallicity, by default 0.0142
- galaxy_age