API Reference

age(h::AbstractGadgetHeader, units::Bool=false)

Computes the age of the universe given the properties from AbstractGadgetHeader.

cosmology(h::AbstractGadgetHeader)

Defines a Cosmology.AbstractCosmology from the properties of h.

lookback_time(h::AbstractGadgetHeader, units::Bool=false)

Computes the lookback tima given the properties from AbstractGadgetHeader.

arcmin_to_kpc(c::Cosmology.AbstractCosmology, θ::Real, z::Real)

Convert arcmin to kpc for a given redshift z and cosmology c. Deletes unit information.

arcmin_to_kpc(c::Cosmology.AbstractCosmology, θ::Unitful.AbstractQuantity, z::Real)

Convert arcmin to kpc for a given redshift z and cosmology c. Conserves unit information.

arcmin_to_kpc(θ::Real, h::AbstractGadgetHeader)

Convert arcmin to kpc for a given redshift and cosmology taken from AbstractGadgetHeader.

arcmin_to_kpc(θ::Unitful.AbstractQuantity, h::AbstractGadgetHeader)

Convert arcmin to kpc for a given redshift and cosmology taken from AbstractGadgetHeader.

mJy_to_W( c::Cosmology.AbstractCosmology, S::Real, z::Real )

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given redshift z and cosmology c. Deletes unit information.

mJy_to_W( c::Cosmology.AbstractCosmology, S::Unitful.AbstractQuantity, z::Real )

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given redshift z and cosmology c. Conserves unit information.

mJy_to_W(S::Union{Real,Unitful.AbstractQuantity}, d::Real)

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given distance d in [Mpc].

mJy_to_W(S::Union{Real, Unitful.AbstractQuantity}, h::AbstractGadgetHeader)

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given redshift and cosmology taken from AbstractGadgetHeader.

mJy_to_W(S::Union{Real,Unitful.AbstractQuantity}, d::Real)

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given distance d in [Mpc].

mJy_to_W(S::Union{Real,Unitful.AbstractQuantity}, d::Unitful.AbstractQuantity)

Converts synchrotron flux density S in [mJy] to [W/Hz] for a given distance d.

redshift(c::AbstractCosmology, t_Gyrs::Real)

Computes the redshift at a given age of the universe in Gyrs for a cosmology t.

redshift(t::Real, h::AbstractGadgetHeader)

See redshift.

redshift(t::Unitful.AbstractQuantity, h::AbstractGadgetHeader)

See redshift.

redshift(t::Unitful.AbstractQuantity, h::AbstractGadgetHeader)

See redshift.

GadgetPhysical( DT::DataType, 
                l_unit::Real=3.085678e21, m_unit::Real=1.989e43, v_unit::Real=1.e5;
                a_scale::Real=1.0, hpar::Real=1.0,
                γ_th::Real=5.0/3.0, xH::Real=0.752)

Set up a unit struct with a given DataType.

GadgetPhysical( h::SnapshotHeader, 
                l_unit::Real=3.085678e21, m_unit::Real=1.989e43, v_unit::Real=1.e5;
                γ_th::Real=5.0/3.0, xH::Real=0.752)

Set up a unit struct with a given SnapshotHeader. Only works in 64-bits.

GadgetPhysical(l_unit::T=3.085678e21, m_unit::T=1.989e43, v_unit::T=1.e5;
               a_scale::T=1.0, hpar::T=1.0,
               γ_th::T=5.0/3.0, xH::T=0.752) where T

Creates a struct GadgetPhysical which holds the conversion factors between comoving code units and physical units, without unit information.

Keyword arugments specify:

Arguments

• a_scale::T = 1.0: Cosmological scale factor of the simulation. Can be passed with the header h as h.time.
• hpar::T = 1.0: Hubble constant as 'little h'. Can be passed with header h as h.h0.
• γ_th::T = 5.0/3.0: Adiabatic index of gas.
• xH::T = 0.752: Hydrogen fraction of the simulation, if run without chemical model.

Fields

GadgetPhysicalUnits( DT::DataType, 
                        l_unit::Real=3.085678e21, m_unit::Real=1.989e43, v_unit::Real=1.e5;
                        a_scale::Real=1.0, hpar::Real=1.0,
                        γ_th::Real=5.0/3.0, xH::Real=0.752)

Set up a unit struct with a given DataType.

GadgetPhysical( h::SnapshotHeader, 
                l_unit::Real=3.085678e21, m_unit::Real=1.989e43, v_unit::Real=1.e5;
                γ_th::Real=5.0/3.0, xH::Real=0.752)

Set up a unit struct with a given SnapshotHeader. Only works in 64-bits.

GadgetPhysicalUnits(l_unit::T=3.085678e21, m_unit::T=1.989e43, v_unit::T=1.e5;
                    a_scale::T=1.0, hpar::T=1.0,
                    γ_th::T=5.0/3.0, xH::T=0.752) where T

Creates a struct GadgetPhysicalUnits which holds the conversion factors between comoving code units and physical units. Stores the unit information which can be converted with Unitful or UnitfulAstro.

Keyword Arguments

• a_scale::T = 1.0: Cosmological scale factor of the simulation. Can be passed with the header h as h.time.
• hpar::T = 1.0: Hubble constant as 'little h'. Can be passed with header h as h.h0.
• γ_th::T = 5.0/3.0: Adiabatic index of gas.
• xH::T = 0.752: Hydrogen fraction of the simulation, if run without chemical model.

Fields