zeus21.constants

Keep here all global flags, numerical constants, and conversion factors/units.

Authors: zeus21 v2 collaboration - June 2026

Emily Bregou ; Hector Afonso G. Cruz ; Sarah Libanore ; Julian B. Muñoz ; Yonny Sklansky ; Emilie Thélie ; Alessandra Venditti

arXiv:2302.08506, arXiv:2306.09403, arXiv:2407.18294, Sklansky et al. (in prep)

Attributes

MpcToKm

KmToMpc

Mpctocm

MsunToKm

MsunToMpc

Msuntogram

GramtoGeV

MsuntoGeV

mH_GeV

mprotoninMsun

c_kms

c_Mpcs

yrTos

Mpctoyr

ergToK

KtoeV

Elw_eV

deltaNulw

normLX_CONST

EN_ION_HI

EN_ION_HeI

sigma0norm

ZMAX_INTEGRAL

wavelengthLyC

wavelengthLyA

wavelengthLyB

freqLyA

freqLyB

freqLyCont

n_max_recycle

fractions_recycle

gcolorfactorHirata

widthLyA

widthLyAcm

Tstar_21

A10_21

RGauss_factor

ALPHA_accretion_exponential

EPSQ_accretion

alphaB

ZMAX_Bubbles

sigmaT

zHeIIreio

FLAG_DO_BUBBLES

MU_AVG

MU_LoS

NZ_TOINT

zeropoint_ABmag_ergsHz

zmax_AstroBreak

redshiftFactor_Visbal

a_Hirata

b_Hirata

c_Hirata

Module Contents

zeus21.constants.MpcToKm = 3.086e+19[source]
zeus21.constants.KmToMpc = 3.240440699935191e-20[source]
zeus21.constants.Mpctocm = 3.086e+24[source]
zeus21.constants.MsunToKm = 1.48[source]
zeus21.constants.MsunToMpc = 4.7958522359040825e-20[source]
zeus21.constants.Msuntogram = 1.989e+33[source]
zeus21.constants.GramtoGeV = 1.7826619228369082e-24[source]
zeus21.constants.MsuntoGeV = 1.1157471725400001e+57[source]
zeus21.constants.mH_GeV = 0.93827209[source]
zeus21.constants.mprotoninMsun = 8.409361126714955e-58[source]
zeus21.constants.c_kms = 299792.458[source]
zeus21.constants.c_Mpcs = 9.714596824368113e-15[source]
zeus21.constants.yrTos = 31540000.0[source]
zeus21.constants.Mpctoyr = 3263724.7868785583[source]
zeus21.constants.ergToK = 7240000000000000.0[source]
zeus21.constants.KtoeV = 8.62e-05[source]
zeus21.constants.Elw_eV = 11.9[source]
zeus21.constants.deltaNulw = 580000000000000.0[source]
zeus21.constants.normLX_CONST = 1e+40[source]
zeus21.constants.EN_ION_HI = 13.6[source]
zeus21.constants.EN_ION_HeI = 24.59[source]
zeus21.constants.sigma0norm = 1e-18[source]
zeus21.constants.ZMAX_INTEGRAL = 35.0[source]
zeus21.constants.wavelengthLyC = 91.1753[source]
zeus21.constants.wavelengthLyA = 121.56706666666666[source]
zeus21.constants.wavelengthLyB = 102.57221249999999[source]
zeus21.constants.freqLyA = 2466066396271797.0[source]
zeus21.constants.freqLyB = 2922745358544352.5[source]
zeus21.constants.freqLyCont = 3288088528362396.5[source]
zeus21.constants.n_max_recycle = 22[source]
zeus21.constants.fractions_recycle = [1.0, 0.0, 0.2609, 0.3078, 0.3259, 0.3353, 0.341, 0.3448, 0.3476, 0.3496, 0.3512, 0.3524,...[source]
zeus21.constants.gcolorfactorHirata = 0.405535[source]
zeus21.constants.widthLyA = 50000000.0[source]
zeus21.constants.widthLyAcm = 0.0016678204759907602[source]
zeus21.constants.Tstar_21 = 0.0682[source]
zeus21.constants.A10_21 = 2.85e-15[source]
zeus21.constants.RGauss_factor = 0.633[source]
zeus21.constants.ALPHA_accretion_exponential = 0.79[source]
zeus21.constants.EPSQ_accretion = 0.6[source]
zeus21.constants.alphaB = 2.5808383233532936e-13[source]
zeus21.constants.ZMAX_Bubbles = 20.0[source]
zeus21.constants.sigmaT = 6.6524e-25[source]
zeus21.constants.zHeIIreio = 3.0[source]
zeus21.constants.FLAG_DO_BUBBLES = False[source]
zeus21.constants.MU_AVG = 0.6[source]
zeus21.constants.MU_LoS = 1.0[source]
zeus21.constants.NZ_TOINT = 3[source]
zeus21.constants.zeropoint_ABmag_ergsHz = 51.63[source]
zeus21.constants.zmax_AstroBreak = 50.0[source]
zeus21.constants.redshiftFactor_Visbal = 1.04[source]
zeus21.constants.a_Hirata = 2.98394[source]
zeus21.constants.b_Hirata = 1.53583[source]
zeus21.constants.c_Hirata = 3.8528[source]