Mixins

New in version 3.1.

Mixins are lighter components with the sole purpose of giving all atmospheric components new abilities and features. For the coding inclined you can see the article here.

makefree

Works under: [Chemistry]

Adds new molecules or forces specific molecules in a chemical scheme to become fittable. Molecules will behave like a Gas and will add them as fitting parameters. Molecules can be defined similarly to free. For example if we load a chemistry from file, normally we cannot retrieve any molecule. If add the makefree mixin we can force specific molecules and add in new molecules into the scheme:

[Chemistry]
chemistry_type = makefree+file
filename = "mychemistryprofile.dat"
gases = H2O, CH4, CO, CO2

    [CH4]
    gas_type = constant

    [TiO]
    gas_type = constant

[Fitting]
CH4:fit = True
TiO:fit = True

Here, CH4 will has become fittable and we injected TiO into the scheme. What happens is that each time the chemistry will run it will first run the base scheme and then modify or inject the molecule into the profile. Afterwhich the mixing profiles are then renormalized to unity. This can also work for equlibrium schemes, for example using ACE:

[Chemistry]
chemistry_type = makefree+ace
metallicity = 1.0

    [CH4]
    gas_type = constant

    [TiO]
    gas_type = constant

[Fitting]
CH4:fit = True
TiO:fit = True
metallicity:fit = True

Only the free chemical scheme does not work as it is redundant.