112 lines
3.3 KiB
Python
112 lines
3.3 KiB
Python
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import healpy as hp
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import numpy as np
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import cosmotool as ct
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import argparse
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import h5py as h5
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from matplotlib import pyplot as plt
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Mpc=3.08e22
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rhoc = 1.8864883524081933e-26 # m^(-3)
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sigmaT = 6.6524e-29
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mp = 1.6726e-27
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lightspeed = 299792458.
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v_unit = 1e3 # Unit of 1 km/s
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T_cmb=2.725
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h = 0.71
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Y = 0.245 #The Helium abundance
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Omega_matter = 0.26
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Omega_baryon=0.0445
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G=6.67e-11
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MassSun=2e30
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frac_electron = 1.0 # Hmmmm
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frac_gas_galaxy = 0.14
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mu = 1/(1-0.5*Y)
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baryon_fraction = Omega_baryon / Omega_matter
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ksz_normalization = T_cmb*sigmaT*v_unit/(lightspeed*mu*mp) * baryon_fraction
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rho_mean_matter = Omega_matter * (3*(100e3/Mpc)**2/(8*np.pi*G))
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parser=argparse.ArgumentParser(description="Generate Skymaps from CIC maps")
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parser.add_argument('--boxsize', type=float, required=True)
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parser.add_argument('--Nside', type=int, default=128)
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parser.add_argument('--base_h5', type=str, required=True)
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parser.add_argument('--base_fig', type=str, required=True)
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parser.add_argument('--start', type=int, required=True)
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parser.add_argument('--end', type=int, required=True)
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parser.add_argument('--step', type=int, required=True)
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parser.add_argument('--minval', type=float, default=-0.5)
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parser.add_argument('--maxval', type=float, default=0.5)
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parser.add_argument('--depth_min', type=float, default=10)
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parser.add_argument('--depth_max', type=float, default=60)
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parser.add_argument('--iid', type=int, default=0)
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parser.add_argument('--ksz_map', type=str, required=True)
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args = parser.parse_args()
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L = args.boxsize
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Nside = args.Nside
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def build_sky_proj(density, dmax=60.,dmin=0,iid=0):
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N = density.shape[0]
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ix = (np.arange(N)-0.5)*L/N - 0.5 * L
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dist2 = (ix[:,None,None]**2 + ix[None,:,None]**2 + ix[None,None,:]**2)
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flux = density.transpose().astype(ct.DTYPE) # / dist2
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dmax=N*dmax/L
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dmin=N*dmin/L
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if iid == 0:
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shifter = np.array([0.5,0.5,0.5])
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else:
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shifter = np.array([0.,0.,0.])
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projsky1 = ct.spherical_projection(Nside, flux, dmin, dmax, integrator_id=iid, shifter=shifter, progress=1)
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return projsky1*L/N
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def build_unit_vectors(N):
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ii = np.arange(N)*L/N - 0.5*L
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d = np.sqrt(ii[:,None,None]**2 + ii[None,:,None]**2 + ii[None,None,:]**2)
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d[N/2,N/2,N/2] = 1
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ux = ii[:,None,None] / d
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uy = ii[None,:,None] / d
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uz = ii[None,None,:] / d
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return ux,uy,uz
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for i in xrange(args.start,args.end,args.step):
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ff=plt.figure(1)
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plt.clf()
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with h5.File(args.base_h5 % i, mode="r") as f:
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p = f['velocity'][:]
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davg = np.average(np.average(np.average(f['density'][:],axis=0),axis=0),axis=0)
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p /= davg # Now we have momentum scaled to the mean density
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# Rescale by Omega_b / Omega_m
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p = p.astype(np.float64)
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print p.max(), p.min(), ksz_normalization, rho_mean_matter
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p *= ksz_normalization*rho_mean_matter
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p *= 1e6 # Put it in uK
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p *= -1 # ksz has a minus
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ux,uy,uz = build_unit_vectors(p.shape[0])
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pr = p[:,:,:,0] * ux + p[:,:,:,1] * uy + p[:,:,:,2] * uz
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print p.max(), p.min()
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print pr.max()*Mpc, pr.min()*Mpc
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@ct.timeit_quiet
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def run_proj():
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return build_sky_proj(pr*Mpc, dmin=args.depth_min,dmax=args.depth_max,iid=args.iid)
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proj = run_proj()
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hp.write_map(args.ksz_map % i, proj)
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hp.mollview(proj, fig=1, coord='CG', cmap=plt.cm.coolwarm, title='Sample %d' % i, min=args.minval,
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max=args.maxval)
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ff.savefig(args.base_fig % i)
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