synthesizer.emission_models.stellar.models¶

A submodule containing the definitions of common stellar emission models.

This module contains the definitions of commoon stellar emission models that can be used “out of the box” to generate spectra from components or as a foundation to work from when creating more complex models.

Example usage:

# Create a simple emission model
model = TotalEmission(
    grid=grid,
    dust_curve=dust_curve,
    tau_v=tau_v,
    dust_emission_model=dust_emission_model,
    fesc=0.0,
)

# Generate the spectra
spectra = stars.get_spectra(model)

Classes

class synthesizer.emission_models.stellar.models.EmergentEmission(grid, dust_curve=None, apply_dust_to=None, tau_v=None, fesc=0.0, label='emergent', attenuated=None, escaped=None, **kwargs)[source]¶

An emission model that defines the emergent emission.

This defines combination of the attenuated and escaped emission components to produce the emergent emission.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

dust_curve¶

The dust curve to use.

Type:: synthesizer.dust.DustCurve

apply_dust_to¶

The emission model to apply the dust to.

Type:: EmissionModel

tau_v¶

The optical depth of the dust.

Type:: float

fesc¶

The escape fraction of the emission.

Type:: float

label¶

The label for this emission model.

Type:: str

class synthesizer.emission_models.stellar.models.EscapedEmission(grid, label='escaped', fesc=0.0, **kwargs)[source]¶

An emission model that extracts the escaped radiation field.

This defines an extraction of key “escaped” from a SPS grid.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

Note: The escaped model is the “mirror” to the transmitted model. What is transmitted is not escaped and vice versa. Therefore EscapedEmission.fesc = 1 - TransmittedEmission.fesc. This will be checked to be true at the time of spectra generation.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

extract¶

The key to extract from the grid.

Type:: str

fesc¶

The escape fraction of the emission. Note that this will be set to 1 - fesc during generation, i.e. it is the fraction that does not escape that should be passed.

Type:: float

class synthesizer.emission_models.stellar.models.IncidentEmission(grid, label='incident', **kwargs)[source]¶

An emission model that extracts the incident radiation field.

This defines an extraction of key “incident” from a SPS grid.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

extract¶

The key to extract from the grid.

Type:: str

Examples using `synthesizer.emission_models.stellar.models.IncidentEmission`¶

Aperture Mask Example

Parametric Young Stars Example

Camels example

Image addition example

Demonstrate the dense basis approach for describing the SFZH

Plot delta_lambda for a grid.

Generating Lines from a Parametric Galaxy

Generate parametric galaxy SED

Plot equivalent width for UV indices

Create sampled SED

Compare parametric and particle SEDs

Compare SPS grid assignment methods

class synthesizer.emission_models.stellar.models.IntrinsicEmission(grid, fesc, label='intrinsic', fesc_ly_alpha=1.0, escaped=None, reprocessed=None, **kwargs)[source]¶

An emission model that defines the intrinsic emission.

This defines a combination of the reprocessed and escaped emission.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

combine¶

The emission models to combine.

Type:: list

fesc¶

The escape fraction of the emission.

Type:: float

class synthesizer.emission_models.stellar.models.NebularContinuumEmission(grid, label='nebular_continuum', fesc=0.0, **kwargs)[source]¶

An emission model that extracts the nebular continuum emission.

This defines an extraction of key “nebular_continuum” from a SPS grid.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

extract¶

The key to extract from the grid.

Type:: str

fesc¶

The escape fraction of the emission.

Type:: float

class synthesizer.emission_models.stellar.models.NebularEmission(grid, label='nebular', fesc=0.0, fesc_ly_alpha=1.0, nebular_line=None, nebular_continuum=None, **kwargs)[source]¶

An emission model that combines the nebular emissions.

This defines a combination of the nebular continuum and line emission components.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

combine¶

The emission models to combine.

Type:: list

fesc¶

The escape fraction of the emission.

Type:: float

Examples using `synthesizer.emission_models.stellar.models.NebularEmission`¶

Camels example

class synthesizer.emission_models.stellar.models.NebularLineEmission(grid, label='nebular_line', fesc=0.0, fesc_ly_alpha=1.0, **kwargs)[source]¶

An emission model for the nebular line emission.

This defines the luminosity contribution of the lines to the total nebular output.

This is a child of the EmissionModel class; for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

extract¶

The key to extract from the grid.

Type:: str

fesc¶

The escape fraction of the emission.

Type:: float

class synthesizer.emission_models.stellar.models.ReprocessedEmission(grid, label='reprocessed', fesc=0.0, fesc_ly_alpha=1.0, nebular=None, transmitted=None, **kwargs)[source]¶

An emission model that combines the reprocessed emission.

This defines a combination of the nebular and transmitted components.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

combine¶

The emission models to combine.

Type:: list

fesc¶

The escape fraction of the emission.

Type:: float

Examples using `synthesizer.emission_models.stellar.models.ReprocessedEmission`¶

Camels example

Create image example

Generate parametric galaxy SED

Plot equivalent width for UV indices

class synthesizer.emission_models.stellar.models.TotalEmission(grid, dust_curve, tau_v, dust_emission_model=None, label='total', fesc=0.0, fesc_ly_alpha=1.0, **kwargs)[source]¶

An emission model that defines the total emission.

This defines the combination of the emergent and dust emission components to produce the total emission.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

dust_curve¶

The dust curve to use.

Type:: synthesizer.dust.DustCurve

tau_v¶

The optical depth of the dust.

Type:: float

dust_emission_model¶

The dust emission model to use.

Type:: synthesizer.dust.EmissionModel

label¶

The label for this emission model.

Type:: str

fesc¶

The escape fraction of the emission.

Type:: float

Examples using `synthesizer.emission_models.stellar.models.TotalEmission`¶

Plot line of sight diagnostics

class synthesizer.emission_models.stellar.models.TransmittedEmission(grid, label='transmitted', fesc=0.0, **kwargs)[source]¶

An emission model that extracts the transmitted radiation field.

This defines an extraction of key “transmitted” from a SPS grid.

This is a child of the EmissionModel class for a full description of the parameters see the EmissionModel class.

grid¶

The grid object to extract from.

Type:: synthesizer.grid.Grid

label¶

The label for this emission model.

Type:: str

extract¶

The key to extract from the grid.

Type:: str

fesc¶

The escape fraction of the emission.

Type:: float

Examples using `synthesizer.emission_models.stellar.models.TransmittedEmission`¶

Compare Single star particle to instantaneous SFZH

synthesizer.emission_models.stellar.models¶

Examples using synthesizer.emission_models.stellar.models.IncidentEmission¶

Examples using synthesizer.emission_models.stellar.models.NebularEmission¶

Examples using synthesizer.emission_models.stellar.models.ReprocessedEmission¶

Examples using synthesizer.emission_models.stellar.models.TotalEmission¶

Examples using synthesizer.emission_models.stellar.models.TransmittedEmission¶

Examples using `synthesizer.emission_models.stellar.models.IncidentEmission`¶

Examples using `synthesizer.emission_models.stellar.models.NebularEmission`¶

Examples using `synthesizer.emission_models.stellar.models.ReprocessedEmission`¶

Examples using `synthesizer.emission_models.stellar.models.TotalEmission`¶

Examples using `synthesizer.emission_models.stellar.models.TransmittedEmission`¶