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The SKIRT project
advanced radiative transfer for astrophysics
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The SKIRT project
advanced radiative transfer for astrophysics
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#include <ToddlersSEDFamily.hpp>
Public Types | |
| enum class | PAHFraction : int { High , Low } |
| enum class | Resolution : int { Low , High } |
Public Member Functions | |
| ToddlersSEDFamily (SimulationItem *parent, PAHFraction pahfraction, Resolution resolution) | |
| double | cdf (Array &lambdav, Array &pv, Array &Pv, const Range &wavelengthRange, const Array ¶meters) const override |
| Range | intrinsicWavelengthRange () const override |
| PAHFraction | pahfraction () const |
| vector< SnapshotParameter > | parameterInfo () const override |
| Resolution | resolution () const |
| double | specificLuminosity (double wavelength, const Array ¶meters) const override |
| virtual double | cdf (Array &lambdav, Array &pv, Array &Pv, const Range &wavelengthRange, const Array ¶meters) const =0 |
| virtual Range | intrinsicWavelengthRange () const =0 |
| virtual vector< SnapshotParameter > | parameterInfo () const =0 |
| virtual double | specificLuminosity (double wavelength, const Array ¶meters) const =0 |
 Public Member Functions inherited from SimulationItem | |
| template<class T > | |
| T * | find (bool setup=true) const |
| template<class T > | |
| T * | interface (int levels=-999999, bool setup=true) const |
| virtual string | itemName () const |
| void | setup () |
| string | typeAndName () const |
| Public Member Functions inherited from Item | |
| Item (const Item &)=delete | |
| virtual | ~Item () |
| void | addChild (Item *child) |
| const vector< Item * > & | children () const |
| virtual void | clearItemListProperty (const PropertyDef *property) |
| void | destroyChild (Item *child) |
| virtual bool | getBoolProperty (const PropertyDef *property) const |
| virtual vector< double > | getDoubleListProperty (const PropertyDef *property) const |
| virtual double | getDoubleProperty (const PropertyDef *property) const |
| virtual string | getEnumProperty (const PropertyDef *property) const |
| virtual int | getIntProperty (const PropertyDef *property) const |
| virtual vector< Item * > | getItemListProperty (const PropertyDef *property) const |
| virtual Item * | getItemProperty (const PropertyDef *property) const |
| virtual string | getStringProperty (const PropertyDef *property) const |
| int | getUtilityProperty (string name) const |
| virtual void | insertIntoItemListProperty (const PropertyDef *property, int index, Item *item) |
| Item & | operator= (const Item &)=delete |
| Item * | parent () const |
| virtual void | removeFromItemListProperty (const PropertyDef *property, int index) |
| virtual void | setBoolProperty (const PropertyDef *property, bool value) |
| virtual void | setDoubleListProperty (const PropertyDef *property, vector< double > value) |
| virtual void | setDoubleProperty (const PropertyDef *property, double value) |
| virtual void | setEnumProperty (const PropertyDef *property, string value) |
| virtual void | setIntProperty (const PropertyDef *property, int value) |
| virtual void | setItemProperty (const PropertyDef *property, Item *item) |
| virtual void | setStringProperty (const PropertyDef *property, string value) |
| void | setUtilityProperty (string name, int value) |
| virtual string | type () const |
Protected Member Functions | |
| ToddlersSEDFamily () | |
| void | setupSelfBefore () override |
| Protected Member Functions inherited from SEDFamily | |
| SEDFamily () | |
| Protected Member Functions inherited from SimulationItem | |
| SimulationItem () | |
| virtual bool | offersInterface (const std::type_info &interfaceTypeInfo) const |
| virtual void | setupSelfAfter () |
| virtual void | setupSelfBefore () |
| Protected Member Functions inherited from Item | |
| Item () | |
Private Types | |
| using | BaseType = SEDFamily |
| using | ItemType = ToddlersSEDFamily |
Private Attributes | |
| PAHFraction | _pahfraction |
| Resolution | _resolution |
| StoredTable< 5 > | _table |
Friends | |
| class | ItemRegistry |
An instance of the ToddlersSEDFamily class represents the TODDLERS (Time evolution of Dust Diagnostics and Line Emission from Regions containing young Stars) family of star-forming region SEDs parameterized on age, metallicity, star formation efficiency, and cloud number density. This SED template library is described in detail by Kapoor et al. in the manuscript submitted to MNRAS on May 26, 2023. The spectra were generated using the Cloudy master branch commit with SHA 69c3fa5871da3262341910e37c6ed2e5fb76dd3c.
The SEDs in the TODDLERS library are tabulated over a wavelength range from \(0.01\) to \(3000~\mu\mathrm{m}\) and include both continuum and line emission. The low-resolution version of the library uses the default Cloudy output resolution of \(R= \lambda/\Delta\lambda = 300\) to represent both the line and continuum components as calculated by Cloudy, resulting in 3787 wavelength points. The high-resolution version includes a large subset of the emission lines (as detailed in the paper), represented using high-resolution Gaussian line profiles with \(R= \lambda/\Delta\lambda_\mathrm{G} = 5\times 10^4\), where \(\Delta\lambda_\mathrm{G}\) is the width of the \(4 \sigma\) truncated Gaussian. These line profiles are added to the default \(R=300\) resolution Cloudy continuum, resulting in a total of 9756 wavelength points with the overall spectral resolution structure shown below.
The TODDLERS parameter space spans 90 ages from 0.1-30 Myr, 5 metallicity values from 0.001-0.04, 7 star formation efficiencies from 0.01-0.15, and 9 cloud number densities from 10-2560 \(\mathrm{cm}^{-3}\). The PAH-to-dust fraction is a maximum value scaled by the neutral hydrogen abundance in component shells/clouds. Two maximum PAH fractions are available: High = 4.6%, Low = 1%.
Finally, the SEDs are scaled by the mass of the imported star-forming region particle. The scaling assumes a cloud mass function obeying a power law with slope -1.8, i.e., \(dN/dM \propto M^{-1.8}\) running from a cloud mass of \(10^5\) to \(10^{6.75}~\mathrm{M}_\odot\), sampled using 8 equi-logspaced cloud masses. Given the age range of the library, stellar particles younger than 30 Myr should be considered as star-forming region candidates, with their initial mass as the mass used for scaling.
When imported from a text column file, the parameters for this SED family must appear in the following order in the specified default units (unless these units are overridden by column header info):
\[ t\,(\mathrm{yr}) \quad Z\,(\mathrm{dimensionless}) \quad \mathrm{SFE}\,(\mathrm{dimensionless}) \quad n_\mathrm{cloud} (\mathrm{cm}^{-3}) \quad M\,(\mathrm{M}_\odot) \]
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strong |
The enumeration type indicating the maximum PAH-to-dust fraction.
High : "High PAH-to-dust fraction (4.6%)" .
Low : "Low PAH-to-dust fraction (1%)" .
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strong |
The enumeration type indicating the wavelength resolution.
Low : "Low wavelength resolution (continuum and lines at R=300)" .
High : "High wavelength resolution (continuum at R=300 and lines at R=5e4)" .
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inlineprotected |
Default constructor for concrete Item subclass ToddlersSEDFamily : "a Toddlers SED family for emission from star-forming regions" .
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explicit |
This constructor can be invoked programmatically by classes that use a hard-coded SED family (as opposed to selected through the ski file). Before the constructor returns, the newly created object is hooked up as a child to the specified parent in the simulation hierarchy (so it will automatically be deleted), and its setup() function has been called.
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overridevirtual |
This function constructs both the normalized probability density function (pdf) and the corresponding normalized cumulative distribution function (cdf) for the SED with the specified parameters over the specified wavelength range. The function returns the normalization factor. The number and type of parameters must match the information returned by the parameterInfo() function; if not the behavior is undefined.
Implements SEDFamily.
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overridevirtual |
This function returns the intrinsic wavelength range of the SED family. It retrieves this range from the underlying stored table.
Implements SEDFamily.
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inline |
This function returns the value of the discoverable PAHFraction enumeration property pahfraction : "the maximum PAH-to-dust fraction" .
The default value for this property is given by the conditional value expression "High" .
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overridevirtual |
This function returns the number and type of parameters used by this particular SED family as a list of SnapshotParameter objects. Each of these objects specifies unit information and a human-readable description for the parameter.
Implements SEDFamily.
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inline |
This function returns the value of the discoverable Resolution enumeration property resolution : "the wavelength resolution" .
The default value for this property is given by the conditional value expression "Low" .
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overrideprotectedvirtual |
This function opens the appropriate resource file (in SKIRT stored table format).
Reimplemented from SimulationItem.
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overridevirtual |
This function returns the specific luminosity \(L_\lambda\) (i.e. radiative power per unit of wavelength) for the SED with the specified parameters at the specified wavelength, or zero if the wavelength is outside of the SED's intrinsic wavelength range. The number and type of parameters must match the information returned by the parameterInfo() function; if not the behavior is undefined.
Implements SEDFamily.