fiesta.properties.calc_chem_density

fiesta.properties.calc_chem_density(chem, ndens, unit=Unit('1 / cm3'))

Calculates chemical densities \(n_\mathrm{HI}\), \(n_\mathrm{H^+}\), \(n_\mathrm{H_2}\), \(n_\mathrm{CO}\), \(n_\mathrm{tot}\).

Parameters:

• chem (Quantity) – See variable chem in ArepoVoronoiGrid.

• ndens (Quantity) – Number density \(n\).

• unit (Unit, optional) – Unit to output the result in. Default value is u.cm**-3.

Returns:

• nHI (Quantity) – Neutral hydrogen number density \(n_\mathrm{HI}\).

• nHp (Quantity) – Ionized hydrogen number density \(n_\mathrm{H^+}\).

• nH2 (Quantity) – Molecular hydrogen number density \(n_\mathrm{H_2}\).

• nCO (Quantity) – CO number density \(n_\mathrm{CO}\).

• nTOT (Quantity) – Total number density \(n_\mathrm{tot}\).