synthesizer.emission_models.generators.dust.dust_emission_base

A submodule containing base classes for dust emission generators.

This includes generic base classes for energy-balance and scaled dust emission emissions, as well as a utility function for calculating CMB heating effects.

These base classes are not intended to be used directly, but rather to be inherited by specific dust emission models that implement the wrapper methods that generate the actual dust emission spectra and then scale them appropriately.

Functions

synthesizer.emission_models.generators.dust.dust_emission_base.get_cmb_heating_factor(temperature, emissivity, redshift)

Return the factor by which the CMB boosts the infrared luminosity.

This will also update the temperature of the dust at redshift z.

(See implementation in da Cunha+2013)

Parameters:

• temperature (unyt_array) – The temperature of the dust.

• emissivity (float) – The emissivity index in the FIR (no unit)

• redshift (float) – The redshift of the galaxy

Return type:

tuple[float, unyt_quantity]

Classes

class synthesizer.emission_models.generators.dust.dust_emission_base.DustEmission(intrinsic=None, attenuated=None, scaler=None, do_cmb_heating=False, required_params=())

Dust emission base class.

This is a base class for dust emission models and defines common methods and attributes.

Dust emission comes in two main flavours: energy-balance and scaled dust emission. The former of these requires an intrinsic and attenuated emission to derive the energy absorbed by dust, while the latter requires a scaler emission to scale the dust emission by. These can also be used in isolation without defining the intrinsic, attenuated or scaler emissions, in which case normalised emissions are returned.

apply_cmb_heating(temperature, emissivity, redshift)

Compute the cmb heating factor and modify the temperature.

This stores the effective temperature in last_effective_temperature which can be returned by temperature_z for labelling. This feature is mostly only useful when using the generators in isolation.

Return type:

Tuple

property cmb_factor

The last processed cmb heating factor.

get_scaling(emitter, model, emissions)

Get the bolometric luminosity to scale the dust emission by.

Parameters:

• emitter (Stars/Gas/BlackHole) – The object emitting the emission.

• model (EmissionModel) – The emission model generating the emission.

• emissions (dict) – Dictionary containing all emissions generated so far.

Returns:

The bolometric luminosity to scale the dust emission by.

Return type:

unyt_quantity

set_energy_balance(intrinsic, attenuated)

Set the dust emission to be energy-balance.

Parameters:

• intrinsic (EmissionModel) – The name of the intrinsic emission defining the unattenuated emission for energy balance.

• attenuated (EmissionModel) – The name of the attenuated emission defining the attenuated emission for energy balance.

Return type:

None

set_scaler(scaler)

Set the dust emission to be scaled.

Parameters:

scaler (EmissionModel) – The name of the emission to use to scale the dust emission by.

Return type:

None

property temperature_z

The last processed effective temperature.