UnitsΒΆ
The default parameters in PyChem
are
UnitLength_in_cm = 3.085e+21; # 1.0 kpc */
UnitMass_in_g = 1.989e+43; # 1.0e10 solar masses */
UnitVelocity_in_cm_per_s = 20725573.785998672; # 207 km/sec */
To change this default, you can pass new values during the initialisatio of PyChem
:
params={}
params['UnitLength_in_cm'] = 3.085e+21 # unit length in kpc
params['UnitMass_in_g'] = 1.989e+33 # unit mass in solar mass
params['UnitVelocity_in_cm_per_s'] = 9918338477366.2539 # unit velocity in kpc/yr
from PyChem import chemistry
chemistry.init_chimie("../chemistry.simple.dat",params=params)
The internal units of time will then be in years. It is possible to retrives these values with the following command:
chemistry.GetParameters()