HII-CHI-mistry

HII-CHI-mistry is a collection of Python subroutines aimed at the calculation of chemical abundances and physical properties using emission line fluxes from ionized gaseous nebulae. A complete description and instructions can be downloaded from here. The code and the different papers can also be inspected in GitHub. These are the available different versions:

• HII-CHI-mistry: Calculation of oxygen, nitrogen-to-oxygen ratio chemical abundances, and ionization parameter using optical emission lines in nebulae ionized by different sources of ionization, valid both for star-forming regions and the Narrow Line Regions (NLR) of Active Galactic Nuclei (AGN).
• HII-CHI-mistry-UV: Calculation of oxygen, carbon-to-oxygen chemical abundances, and ionization parameter using ultraviolet emission lines for both SF and AGN.
• HII-CHI-mistry-IR: Calculation of oxygen, sulphur, nitrogen-to-oxygen chemical abundances, and ionization parameter using infrared emission lines both for SF and AGN.
• HII-CHI-mistry-Teff: Calculation of the equivalent effective temperature of the ionizing source and the ionization parameter using UV and optical emission lines and the metallicity, if available, as inputs. Alternatively it can be used to derive the fraction of absorbed ionizing photons. A version for mid-IR lines can also be retrieved here.