pint.derived_quantities.mass_funct
- pint.derived_quantities.mass_funct(pb: Unit('d'), x: Unit('cm'))[source]
Compute binary mass function from period and semi-major axis
Can handle scalar or array inputs.
- Parameters:
pb (astropy.units.Quantity) – Binary period
x (astropy.units.Quantity) – Semi-major axis, A1SINI, in units of
pint.ls
- Returns:
f_m – Mass function in
u.solMass- Return type:
- Raises:
astropy.units.UnitsError – If the input data are not appropriate quantities
TypeError – If the input data are not quantities
Notes
Calculates
\[f(m_p, m_c) = \frac{4\pi^2 x^3}{G P_b^2}\]See [1]