mirror of
https://github.com/Findus23/halo_comparison.git
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69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
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from math import fabs
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from sys import argv
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import h5py
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import numpy as np
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gamma = 5 / 3
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YHe = 0.245421
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Tcmb0 = 2.7255
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def calculate_gas_internal_energy(omegab, hubble_param_, zstart_):
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astart_ = 1.0 / (1.0 + zstart_)
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if fabs(1.0 - gamma) > 1e-7:
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npol = 1.0 / (gamma - 1.)
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else:
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npol = 1.0
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unitv = 1e5
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adec = 1.0 / (160. * (omegab * hubble_param_ * hubble_param_ / 0.022) ** (2.0 / 5.0))
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if (astart_ < adec):
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Tini = Tcmb0 / astart_
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else:
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Tini = Tcmb0 / astart_ / astart_ * adec
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print("Tini", Tini)
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if Tini > 1.e4:
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mu = 4.0 / (8. - 5. * YHe)
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else:
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mu = 4.0 / (1. + 3. * (1. - YHe))
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print("mu", mu)
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ceint_ = 1.3806e-16 / 1.6726e-24 * Tini * npol / mu / unitv / unitv
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print("ceint", ceint_)
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return ceint_
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def calculate_smoothing_length(boxsize, hubble_param_, levelmax):
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mean_interparte_separation = boxsize / 2 ** levelmax
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print("smoothing length", mean_interparte_separation)
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return mean_interparte_separation
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with h5py.File(argv[1], "r+") as f:
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omegab = f["Cosmology"].attrs["Omega_b"]
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h = f["Cosmology"].attrs["h"]
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zstart = f["Header"].attrs["Redshift"]
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boxsize = f["Header"].attrs["BoxSize"]
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levelmax = f["Header"].attrs["Music_levelmax"]
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internal_energy = calculate_gas_internal_energy(omegab=omegab, hubble_param_=h, zstart_=zstart)
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smoothing_length = calculate_smoothing_length(boxsize=boxsize, hubble_param_=h, levelmax=levelmax)
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# exit()
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bary_mass = f["Header"].attrs["MassTable"][0]
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bary_count = f["Header"].attrs["NumPart_Total"][0]
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print("mass table", f["Header"].attrs["MassTable"])
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pt1 = f["PartType0"]
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masses_column = pt1.create_dataset(
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"Masses",
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data=np.full(bary_count, bary_mass),
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compression='gzip'
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)
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smoothing_length_column = pt1.create_dataset(
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"SmoothingLength",
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data=np.full(bary_count, smoothing_length),
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compression='gzip'
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)
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internal_energy_column = pt1.create_dataset(
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"InternalEnergy",
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data=np.full(bary_count, internal_energy),
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compression='gzip'
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)
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