celestial (version 1.3)

coshalo: Virial halo conversion functions

Description

All 6 Virial paramter conversion functions. Each can map precisely to the other as a one paramter function.

Usage

coshaloMvirToSigma(Mvir=1e+12, Munit=1, Lunit=1000, Vunit=1, DeltaVir=200, H0=100)
coshaloSigmaToMvir(Sigma=230, Munit=1, Lunit=1000, Vunit=1, DeltaVir=200, H0=100)
coshaloMvirToRvir(Mvir=1e12, Munit=1, Lunit=1e3, Vunit=1, DeltaVir=200, H0=100)
coshaloRvirToMvir(Rvir=162.635, Munit=1, Lunit=1e3, Vunit=1, DeltaVir=200, H0=100)
coshaloSigmaToRvir(Sigma=230, Munit=1, Lunit=1e3, Vunit=1, DeltaVir=200, H0=100)
coshaloRvirToSigma(Rvir=162.635, Munit=1, Lunit=1e3, Vunit=1, DeltaVir=200, H0=100)

Arguments

Mvir

Mass within virial radius in units of 'Munit'.

Sigma

Velocity dispersion within virial radius in units of 'Vunit'.

Rvir

Size of virial radius in units of 'Lunit'.

Munit

Base mass unit in multiples of Msun.

Lunit

Base length unit in multiples of parsecs.

Vunit

Base velocity unit in multiples of km/s.

DeltaVir

Relative over-density virial radius.

H0

Hubble constant as defined at z=0 (default is H0=100 (km/s)/Mpc).

Value

coshaloMvirToSigma outputs velocity (in units of Vunit) dispersion given mass.

coshaloSigmaToMvir outputs mass (in units of Munit) given velocity dispersion.

coshaloMvirToRvir outputs radius (in units of Lunit) given mass.

coshaloRvirToMvir outputs mass (in units of Munit) given radius.

coshaloSigmaToRvir outputs radius (in units of Lunit) given velocity dispersion.

coshaloRvirToSigma outputs velocity (in units of Vunit) dispersion given radius.

Details

These functions allow for various analytic conversions between the 3 major properties related to virial radius: the mass, velocity dispresion and size. The default properties calculate properties for 1e12 Msun halos and assume masses in Msun, velocities in km/s and distances in Kpc.

See Also

cosvol, cosmap, cosdist, cosgrow

Examples

# NOT RUN {
coshaloMvirToSigma(1e13) # Velocity in km/s
coshaloMvirToSigma(1e13, Vunit=1e-3) # Velocity in m/s
coshaloSigmaToMvir(coshaloMvirToSigma(1e13, Vunit=1e-3),Vunit=1e-3)
coshaloMvirToRvir(1e13) #Radius in kpc
coshaloSigmaToRvir(coshaloMvirToSigma(1e13, Vunit=1e-3),Vunit=1e-3)
# }