diff options
Diffstat (limited to 'astro')
| -rwxr-xr-x | astro/ps2d.py | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/astro/ps2d.py b/astro/ps2d.py index 3241107..2522920 100755 --- a/astro/ps2d.py +++ b/astro/ps2d.py @@ -49,12 +49,12 @@ logging.basicConfig(level=logging.INFO, logger = logging.getLogger(os.path.basename(sys.argv[0])) -# present Hubble parameter -H0 = 71.0 # [km/s/Mpc] -# present density parameter of matter -OmegaM0 = 0.27 # HI line frequency freq21cm = 1420.405751 # [MHz] +# Adopted cosmology +H0 = 71.0 # [km/s/Mpc] +OmegaM0 = 0.27 +cosmo = FlatLambdaCDM(H0=H0, Om0=OmegaM0) def freq2z(freq): @@ -97,9 +97,8 @@ class PS2D: self.zc = freq2z(self.freqc) logger.info("Central frequency %.2f [MHz] <-> redshift %.4f" % (self.freqc, self.zc)) - self.cosmo = FlatLambdaCDM(H0=H0, Om0=OmegaM0) # Transverse comoving distance at zc; unit: [Mpc] - self.DMz = self.cosmo.comoving_transverse_distance(self.zc).value + self.DMz = cosmo.comoving_transverse_distance(self.zc).value self.window_name = window_name self.window_width = window_width self.window = self.gen_window(name=window_name, width=window_width) @@ -219,7 +218,7 @@ class PS2D: c = ac.c.si.value # [m/s] h = H0 * 1000.0 # [m/s/Mpc] f21cm = freq21cm * 1e6 # [Hz] - denom = c * (1+self.zc)**2 / h / f21cm / self.cosmo.efunc(self.zc) + denom = c * (1+self.zc)**2 / h / f21cm / cosmo.efunc(self.zc) kz = 2*np.pi * eta / denom return kz # [Mpc^-1] |