fiesta.properties.calc_free_fall_time# fiesta.properties.calc_free_fall_time(ndens, unit=Unit('s'))[source]# Calculates free-fall time using \(t_\mathrm{ff} = 2 \times 10^6 \big(\frac{n}{1000~\mathrm{cm}^{-3}}\big)^{-0.5} ~\mathrm{yrs}\). Parameters: ndens (Quantity) – Number density \(n\). unit (Unit, optional) – Unit to output the result in. Default value is u.s. Returns: free_fall_time (Quantity) – Free fall time \(t_\mathrm{ff}\).
