qspec.chi2_ex_rvs  (  t ,  size = 1  )[source]

Random sample energy components $E_x$ from the $\chi^2_1$ probability density function $$ \rho(E_x) = \sqrt{\frac{1}{\pi E_xk_\mathrm{B}T}}\exp\left(-\frac{E_x}{k_\mathrm{B}T}\right), $$ in thermal equilibrium at temperature $T$.

Parameters:

tarray_like

The temperature $T$ of the environment (K).

sizeint | tuple

Either the size (int) or shape (tuple) of the returned velocity array. If m or t is an iterable/array, their common shape must be appended to the desired shape of the random samples.

Returns:

vxndarray

Random energies $E_x$ (m/s).