photolossrates

photolossrates - Determine photoionization and photodissociation rates

class atomicdataMB.photolossrates.PhotoRate(species, aplanet_=<Quantity 1. AU>)

Determine photoreactions and photorates for a species.

Parameters

species

Species to compute rates for.

aplanet

Distance from the Sun. Default is 1 AU. Given as either a numeric type or an astropy quantity with length units.

Class Attributes

species

Species

aplanet

Distance from the Sun; astropy quantity with units AU

rate

Reaction rate; astropy quantity with units s^{-1}. Rate is the sum of all possible reactions for the species.

reactions

Pandas dataframe with columns for reaction and rate (in s^{-1}) for each reaction for the species. This can be used to determine the products produced by photolysis and photoionization.

Example

>>> from atomicdataMB import PhotoRate
>>> kappa = PhotoRate('Na', 0.33)
>>> print(kappa)
Species = Na
Distance = 0.33 AU
Rate = 6.666666666666666e-05 1 / s
>>> print(kappa.rate)
6.666666666666666e-05 1 / s
>>> print(kappa.reactions)
               reaction                  kappa
0  Na, photon -> Na+, e  6.666666666666666e-05
>>> kappa = PhotoRate('H_2O')
>>> print(kappa)
Species = H_2O
Distance = 1.0 AU
Rate = 1.2056349999999999e-05 1 / s
>>> print(kappa.reactions)
                     reaction     kappa
0      H_2O, photon -> H_2, O  5.97e-07
1       H_2O, photon -> OH, H  1.03e-05
2     H_2O, photon -> H, H, O  7.54e-07
3   H_2O, photon -> H, OH+, e  5.54e-08
4   H_2O, photon -> OH, H+, e  1.31e-08
5    H_2O, photon -> H_2O+, e  3.31e-07
6  H_2O, photon -> H_2, O+, e  5.85e-09

atomicdataMB.photolossrates.make_photo_table()

Creates and populates photorates database table. Creates a database table called photorates. Fields in the table:

filename

Filename in project tree containing the data; used only for populating the database

reference

Source of the photoionization or photodissociation rate

species

Atomic or molecular species

reaction

Photoionization or photodissociation reaction

If multiple reaction rates are found for a reaction, user is prompted to choose the best one. Most of the reactions are in: Huebner & Mukherjee (2015), Astrophys. Space Sci., 195, 1-294.

Parameters

None

Returns

No output