def delta_nu(self, *args):
        """Returns asteroseismic delta_nu in uHz

        reference: https://arxiv.org/pdf/1312.3853v1.pdf, Eq (2)
        """
        return 134.88 * np.sqrt(self.mass(*args) / self.radius(*args)**3)
def delta_nu ( self , * args ) : return 134.88 * np . sqrt ( self . mass ( * args ) / self . radius ( * args ) ** 3 )
Returns asteroseismic delta_nu in uHz

        reference: https://arxiv.org/pdf/1312.3853v1.pdf, Eq (2)