cosmo.py 文件源码

def kpc_per_arcsec(self, z):
        """
        Calculate the transversal length (unit: kpc) corresponding to
        1 arcsec at the *angular diameter distance* of z.
        """
        dist_kpc = self.angular_diameter_distance(z, unit="kpc")
        return dist_kpc * au.arcsec.to(au.rad)