37 lines
808 B
Python
37 lines
808 B
Python
import numpy as np
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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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tmpp_cat={'Msun':3.29,
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'alpha':-0.7286211634758224,
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'Mstar':-23.172904033796893,
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'PhiStar':0.0113246633636846,
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'lbar':393109973.22508669}
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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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assert ksz_normalization < 0
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rho_mean_matter = Omega_matter * (3*(100e3/Mpc)**2/(8*np.pi*G))
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Lbar = tmpp_cat['lbar'] / Mpc**3
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M_over_L_galaxy = rho_mean_matter / Lbar
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del np
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