cosmo.py 文件源码

def kpc_per_pix(self, z):
        """
        Calculate the transversal length (unit: kpc) corresponding to
        1 ACIS pixel (i.e., 0.492 arcsec) at the *angular diameter distance*
        of z.
        """
        pix = ACIS.pixel2arcsec * au.arcsec
        dist_kpc = self.angular_diameter_distance(z, unit="kpc")
        return dist_kpc * pix.to(au.rad).value