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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 <LyaGaussianSEDFamily.hpp>
Public Member Functions | |
| double | cdf (Array &lambdav, Array &pv, Array &Pv, const Range &wavelengthRange, const Array ¶meters) const override |
| Range | intrinsicWavelengthRange () const override |
| vector< SnapshotParameter > | parameterInfo () const override |
| double | specificLuminosity (double wavelength, const Array ¶meters) const override |
| 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 | |
| LyaGaussianSEDFamily () | |
| 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 |
| using | ItemType |
Friends | |
| class | ItemRegistry |
An instance of the LyaGaussianSEDFamily class represents a family of Gaussian spectra around the central Lyman-alpha wavelength \(\lambda_\alpha\), reflecting the thermal sub-grid motion in the source. The SED family is parameterized on the bolometric Lyman-alpha line luminosity \(L_\alpha\) and the spectral dispersion \(s\) in velocity units. Using the photon velocity shift
\[ v = \frac{\lambda - \lambda_\alpha} {\lambda_\alpha} \,c \]
as the spectral variable, the spectrum can be written as (see also the LyaGaussianSED class):
\[ L_v(v) = \frac{L_\alpha}{s\,\sqrt{2\pi}} \,\exp\left( -\frac{v^2}{2s^2} \right). \]
The intrinsic range for the complete SED family is taken to be approximately \(\pm 9s\) around the center for a dispersion of \(s=1000\,\mathrm{km/s}\). This results in a range of \(1179 \text{\AA} \le \lambda \le 1253 \text{\AA}\). The source wavelength range configured by the user must fully contain this intrinsic wavelength range.
Whenever a tabular form of a Gaussian SED is requested, this class uses 100 wavelength points per dispersion unit on a regular linear grid.
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):
\[ L_\alpha\,(\mathrm{W}) \quad s\,(\mathrm{km/s}) \]
This item type is displayed only if the Boolean expression "Lya|Level3" evaluates to true after replacing the names by true or false depending on their presence.
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inlineprotected |
Default constructor for concrete Item subclass LyaGaussianSEDFamily: "a family of Gaussian spectra around the central Lyman-alpha wavelength".
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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. For the LyaGaussianSEDFamily, the intrinsic range is determined as decribed in the class header.
Implements SEDFamily.
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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 descripton for the parameter.
Implements SEDFamily.
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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.