Gyoto
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Geometrically thick disk read from FITS file. More...
#include <GyotoDisk3D.h>
Public Member Functions | |
Disk3D () | |
Standard constructor. | |
Disk3D (const Disk3D &) | |
Copy constructor. | |
virtual Disk3D * | clone () const |
Cloner. | |
virtual | ~Disk3D () |
Destructor. | |
virtual void | fitsRead (std::string filename_) |
Read parameters and arrays from FITS file. | |
virtual void | fitsWrite (std::string filename_) |
Write parameters and arrays to FITS file. | |
void | setEmissquant (double *pattern) |
Set Disk3D::emissquant_. More... | |
void | setVelocity (double *pattern) |
Set Disk3D::velocity__. More... | |
virtual void | copyEmissquant (double const *const pattern=NULL, size_t const naxes[4]=NULL) |
Set Disk3D::emissquant_. More... | |
virtual double const * | getEmissquant () const |
Get Disk3D::emissquant_. | |
virtual void | getEmissquantNaxes (size_t naxes[4]) const |
Get { Disk3D::nnu_, Disk3D::nphi_, Disk3D::nz_, Disk3D::nr_ }. | |
virtual void | copyVelocity (double const *const pattern=NULL, size_t const naxes[3]=NULL) |
Set Disk3D::velocity_. More... | |
virtual double const * | getVelocity () const |
Get Disk3D::velocity_. | |
virtual void | repeatPhi (size_t n) |
Set Disk3D::repeat_phi_. | |
virtual size_t | repeatPhi () const |
Get Disk3D::repeat_phi_. | |
virtual void | nu0 (double freq) |
Set Disk3D::nu0_. | |
virtual double | nu0 () const |
Get Disk3D::nu0_. | |
virtual void | dnu (double dfreq) |
Set Disk3D::dnu_. | |
virtual double | dnu () const |
Get Disk3D::dnu_. | |
void | rin (double rrin) |
Set Disk3D::rin_. | |
double | rin () const |
Get Disk3D::rin_. | |
void | rout (double rout) |
Set Disk3D::rout_. | |
double | rout () const |
Get Disk3D::rout_. | |
void | zmin (double zmin) |
Set Disk3D::zmin_. | |
double | zmin () const |
Get Disk3D::zmin_. | |
void | zmax (double zmax) |
Set Disk3D::zmax_. | |
double | zmax () const |
Get Disk3D::zmax_. | |
void | phimin (double phimin) |
Set Disk3D::phimin_. | |
double | phimin () const |
Get Disk3D::phimin_. | |
void | phimax (double phimax) |
Set Disk3D::phimax_. | |
double | phimax () const |
Get Disk3D::phimax_. | |
virtual int | setParameter (std::string name, std::string content, std::string unit) |
Set parameter by name. More... | |
int | Impact (Photon *ph, size_t index, Astrobj::Properties *data) |
Does a photon at these coordinates impact the object? More... | |
virtual void | getVelocity (double const pos[4], double vel[4]) |
Get fluid 4-velocity at point. More... | |
virtual void | fillElement (FactoryMessenger *fmp) const |
Fill XML section. More... | |
virtual void | setParameters (FactoryMessenger *fmp) |
Main loop in Subcontractor_t function. More... | |
virtual SmartPointer < Metric::Generic > | getMetric () const |
Get the Metric Generic::gg_. | |
virtual void | setMetric (SmartPointer< Metric::Generic >) |
Set the Metric Generic::gg_. | |
virtual double | getRmax () |
Get maximal distance from center of coordinate system. More... | |
virtual double | getRmax (std::string unit) |
Get rmax_ is specified unit. More... | |
const std::string | getKind () const |
Get the kind of the Astrobj (e.g. "Star") | |
virtual void | setRmax (double val) |
Set maximal distance from center of coordinate system. More... | |
virtual void | setRmax (double val, std::string unit) |
Set maximal distance from center of coordinate system. More... | |
virtual void | unsetRmax () |
Set rmax_set_ to 0. More... | |
void | setFlag_radtransf (int flag) |
Set whether the object is optically thin. More... | |
int | getFlag_radtransf () const |
Query whether object is optically thin. More... | |
virtual Quantity_t | getDefaultQuantities () |
Which quantities to compute if know was requested. More... | |
virtual void | processHitQuantities (Photon *ph, double *coord_ph_hit, double *coord_obj_hit, double dt, Astrobj::Properties *data) const |
Fills Astrobj::Properties. More... | |
virtual double | emission (double nu_em, double dsem, double coord_ph[8], double coord_obj[8]=NULL) const |
Specific intensity Iν More... | |
virtual void | emission (double Inu[], double nu_em[], size_t nbnu, double dsem, double coord_ph[8], double coord_obj[8]=NULL) const |
Specific intensity Iν for several values of νem More... | |
virtual double | integrateEmission (double nu1, double nu2, double dsem, double c_ph[8], double c_obj[8]=NULL) const |
∫ν1ν2 Iν dν (or jν) More... | |
virtual void | integrateEmission (double *I, double const *boundaries, size_t const *chaninds, size_t nbnu, double dsem, double *cph, double *co) const |
∫ν1ν2 Iν dν (or jν) More... | |
virtual double | transmission (double nuem, double dsem, double coord[8]) const |
Transmission: exp( αν * dsem ) More... | |
Protected Types | |
typedef Gyoto::SmartPointer < Gyoto::SmartPointee > | Subcontractor_t (Gyoto::FactoryMessenger *) |
A subcontractor builds an object upon order from the Factory. More... | |
Protected Member Functions | |
void | getIndices (size_t i[4], double const co[4], double nu=0.) const |
Get emissquant_ cell corresponding to position co[4]. | |
void | incRefCount () |
Increment the reference counter. Warning: Don't mess with the counter. | |
int | decRefCount () |
Decrement the reference counter and return current value. Warning: Don't mess with the counter. | |
int | getRefCount () |
Get the current number of references. | |
Protected Attributes | |
SmartPointer < Gyoto::Metric::Generic > | gg_ |
The Metric in this end of the Universe. | |
double | rmax_ |
Maximum distance to the center of the coordinate system [geometrical units]. More... | |
int | rmax_set_ |
Never recompute rmax: it was externally set. More... | |
const std::string | kind_ |
Kind of object (e.g. "Star"...) More... | |
int | flag_radtransf_ |
1 if radiative transfer inside Astrobj, else 0 | |
Private Attributes | |
std::string | filename_ |
Optional FITS file name containing the arrays. | |
double * | emissquant_ |
Physical quantity yielding emission. More... | |
double * | velocity_ |
Velocity(r, z, phi) More... | |
double | dnu_ |
Frequency scale of PatternDisk::emission_ in Hz. | |
double | nu0_ |
Lowest frequency provided in PatternDisk::emission_ in Hz. | |
size_t | nnu_ |
Number of frequencies provided in PatternDisk::emission_. | |
double | dphi_ |
δφ between two grid columns | |
double | phimin_ |
Minimum φ in grid. | |
size_t | nphi_ |
Grid size in the φ direction. | |
double | phimax_ |
Maximum φ in grid. | |
size_t | repeat_phi_ |
Number of times the pattern should be repeated to cover [0, 2Π]. More... | |
double | dz_ |
Altitude step. | |
double | zmin_ |
Minimum altitude. | |
size_t | nz_ |
Grid size in the altitude direction. | |
double | zmax_ |
Maximum altitude. | |
double | dr_ |
Radius step. | |
double | rin_ |
Inner radius of the grid. | |
size_t | nr_ |
Number of rows in the patternGrid size in the r direction. | |
double | rout_ |
Outer radius of the grid. | |
Friends | |
class | Gyoto::SmartPointer< Gyoto::Astrobj::Disk3D > |
Geometrically thick disk read from FITS file.
This class is the base class for thick disks. The emitter's velocity is given in a FITS file, together with emission related quantity (typically temperature). This class mainly implements the Impact() function. Emission() function is here left to its default, and should be implemented according to specific needs in heir classes. Here the disk is supposed not to evolve in time. The dynamical treatment is provided in heir classes.
The 3D disk is assumed to be described by a regular (non adaptive) grid of cylindrical geometry. The disk is a slab from rin_ to rout_ and zmin_ (typically = -zmax_) to zmax_.
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inherited |
A subcontractor builds an object upon order from the Factory.
Various classes need to provide a subcontractor to be able to instanciate themselves upon order from the Factory. A subcontractor is a function (often a static member function) which accepts a pointer to a FactoryMessenger as unique parameter, communicates with the Factory using this messenger to read an XML description of the object to build, and returns this objet. SmartPointee::Subcontractor_t* is just generic enough a typedef to cast to and from other subcontractor types: Astrobj::Subcontractor_t, Metric::Subcontractor_t, Spectrum::Subcontractor_t. A subcontractor needs to be registered using the relevant Register() function: Astrobj::Register(), Metric::Register(), Spectrum::Register().
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virtual |
Set Disk3D::emissquant_.
Disk3D::emissquant_ is freed if not NULL, reallocated, and pattern is copied into emission_.
If Disk3D::velocity_ or has been set previously with mismatching sizes, it is deallocated too.
Finally, Disk3D::nnu_, Disk3D::nphi_, Disk3D::nz_ and Disk3D::nr_ are set according to naxes.
pattern | Array to copy as emission_. May be NULL in which case emission_ is simply deallocated and set to NULL. |
naxes | { nnu_, nphi_, nz_, nr_ }. |
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virtual |
Set Disk3D::velocity_.
Disk3D::velocity_ is first freed if not NULL and set to NULL.
If pattern is not NULL, Disk3D::emissquant_ must have been set previously with matching dimensions. Disk3D::velocity_ is then reallocated, and pattern is copied into velocity_.
pattern | Array to copy as velocity_. May be NULL in which case velocity_ is simply deallocated and set to NULL. |
naxes | { nphi_, nz_, nr_ }. |
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virtualinherited |
Specific intensity Iν
Called by the default implementation for processHitQuantities().
emission() computes the intensity Iν emitted by the small volume of length dsem, in the emitter's frame. It should take self-absorption along dsem into account.
Reminder :
The equation used for radiative transfer (without absorption) is:
d(Iν/ν3)/dλ = (jν/ν2) [*]
where λ is the integration parameter along the null geodesic.
NB: Let us consider a particular observer, with ν being the frequency measured by this observer, and ds being the proper distance (as measured by the observer) that the photon travels as it moves from λ to λ+dλ along its geodesic. Then it can be shown that:
dλ = ds/ν
This shows that Eq. [*] is homogeneous.
The default implementation returns 1. if optically thick and dsem if optically thin. It allows for a quick implementation of your object for visualization purposes.
nu_em | Frequency at emission [Hz] |
dsem | length over which to integrate inside the object [geometrical units] |
coord_ph | Photon coordinate |
coord_obj | Emitter coordinate at current photon position |
Reimplemented in Gyoto::Astrobj::PatternDisk, Gyoto::Astrobj::PolishDoughnut, Gyoto::Astrobj::UniformSphere, Gyoto::Astrobj::Torus, Gyoto::Astrobj::DynamicalDisk, Gyoto::Astrobj::Disk3D_BB, Gyoto::Astrobj::PageThorneDisk, Gyoto::Astrobj::PatternDiskBB, and Gyoto::Astrobj::ThinDiskPL.
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virtualinherited |
Specific intensity Iν for several values of νem
Called by the default implementation for processHitQuantities().
emission() computes the intensity Iν emitted by the small volume of length dsem. It should take self-absorption along dsem into account.
Same as emission(double nu_em, double dsem, double coord_ph[8], double coord_obj[8]=NULL) const looping on several values of nu_em.
Inu[nbnu] | Output (must be set to a previously allocated array of doubles) |
nu_em[nbnu] | Frequencies at emission |
nbnu | Size of Inu[] and nu_em[] |
dsem | Length over which to integrate inside the object |
coord_ph | Photon coordinate |
coord_obj | Emitter coordinate at current photon position |
Reimplemented in Gyoto::Astrobj::PolishDoughnut.
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virtual |
Fill XML section.
Astrobj implementations should impement fillElement to save their parameters to XML and call the generic implementation to save generic parts such as Flag_radtrans: Generic::fillElement(fmp).
Reimplemented from Gyoto::Astrobj::Generic.
Reimplemented in Gyoto::Astrobj::Disk3D_BB.
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virtualinherited |
Which quantities to compute if know was requested.
Return a Gyoto::Quantity_t suitable as input to Gyoto::Scenery::setRequestedQuantities() to set de default quantities to compute for this object. The default of these defaults GYOTO_QUANTITY_INTENSITY.
Reimplemented in Gyoto::Astrobj::PageThorneDisk.
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inherited |
Query whether object is optically thin.
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virtualinherited |
Get maximal distance from center of coordinate system.
Get maximal distance from center of coordinate system at which a Photon may hit the object.
Child classes may use the rmax_ member to cache this value.
It can also be set using setRmax(). If setRmax has been used to set rmax_, getRmax() must not recompute it.
Reimplemented in Gyoto::Astrobj::Star, and Gyoto::Astrobj::Torus.
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virtualinherited |
Get rmax_ is specified unit.
Call getRmax() and convert result to unit.
unit | string |
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virtual |
Get fluid 4-velocity at point.
Fill vel with the 4-vector velocity of the fluid at 4-position pos.
[in] | pos | 4-position at which to compute velocity; |
[out] | vel | 4-velocity at pos. |
Reimplemented in Gyoto::Astrobj::Disk3D_BB.
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virtual |
Does a photon at these coordinates impact the object?
Impact() checks whether a Photon impacts the object between two integration steps of the photon's trajectory (those two steps are photon->getCoord(index, coord1) and photon->getCoord(index+1, coord2)). Impact returns 1 if the photon impacts the object between these two steps, else 0. In many cases of geometrically thick obects, the implementation Astrobj::Standard::Impact() will be fine.
Impact will call Generic::processHitQuantities() (which is virtual and may be re-implemented) to compute observable properties on demand: if the data pointer is non-NULL, the object will look in it for pointers to properties which apply to its kind. If a pointer to a property known to this object is present, then the property is computed and store at the pointed-to adress. For instance, all objects know the "intensity" property. If data->intensity != NULL, the instensity is computed and stored in *data->intensity.
If data is non-NULL and only in this case, processHitQuantities() will also call ph->transmit() to update the transmissions of the Photon (see Photon::transmit(size_t, double)). This must not be done if data is NULL (see Astrobj::Complex::Impact() for an explanation).
ph | Gyoto::Photon aimed at the object; |
index | Index of the last photon step; |
data | Pointer to a structure to hold the observables at impact. |
Implements Gyoto::Astrobj::Generic.
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virtualinherited |
∫ν1ν2 Iν dν (or jν)
Compute the integral of emission() from ν1 to ν2. The default implementation is a numerical integrator which works well enough and is reasonably fast if emission() is a smooth function (i.e. no emission or absorption lines). If possible, it is wise to implement an analytical solution. It is used by processHitQuantities to compute the "BinSpectrum" quantity which is the most physical: it is the only quantity that can be actually measured directly by a real-life instrument.
Reimplemented in Gyoto::Astrobj::UniformSphere, and Gyoto::Astrobj::Torus.
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virtualinherited |
∫ν1ν2 Iν dν (or jν)
Like double integrateEmission(double nu1, double nu2, double dsem, double c_ph[8], double c_obj[8]) const for each Spectrometer channel.
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virtualinherited |
Fills Astrobj::Properties.
processHitQuantities fills the requested data in Impact. To use it, you need to call it in the Impact() method for your object in case of hit. It will fill Redshift, Intensity, Spectrum, BinSpectrum and update the Photon's transmission by calling Photon::transmit(), only if data==NULL.
You can overload it for your Astrobj. The generic implementation calls emission(), integrateEmission() and transmission() below.
Reimplemented in Gyoto::Astrobj::PageThorneDisk.
void Gyoto::Astrobj::Disk3D::setEmissquant | ( | double * | pattern | ) |
Set Disk3D::emissquant_.
The pointer is copied directly, not the array content.
This is a low-level function. Beware that:
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inherited |
Set whether the object is optically thin.
Set flag indicating that radiative transfer should be integrated, i.e. the object is to be considered optically thin.
flag,: | 1 if optically thin, 0 if optically thick. |
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virtual |
Set parameter by name.
Assume MyKind is a subclass of Astrobj::Generic which has two members (a string StringMember and a double DoubleMember):
If MyKind is not a direct subclass of Generic but is a subclass of e.g. Standard, UniformSphere of ThinDisk, it should call the corresponding setParameter() implementation instead of Generic::setParameter().
name | XML name of the parameter |
content | string representation of the value |
unit | string representation of the unit |
Reimplemented from Gyoto::Astrobj::Generic.
Reimplemented in Gyoto::Astrobj::Disk3D_BB.
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virtual |
Main loop in Subcontractor_t function.
The Subcontractor_t function for each Astrobj kind should look somewhat like this (templated as Gyoto::Astrobj::Subcontractor<MyKind>):
Each object kind should implement setParameter(string name, string content, string unit) to interpret the individual XML elements. setParameters() can be overloaded in case the specific Astrobj class needs low level access to the FactoryMessenger. See UniformSphere::setParameters().
Reimplemented from Gyoto::Astrobj::Generic.
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virtualinherited |
Set maximal distance from center of coordinate system.
Set maximal distance from center of coordinate system at which a Photon may hit the object.
Side effect: set rmax_set_ to 1.
val | new rmax_ in geometrical units. |
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virtualinherited |
Set maximal distance from center of coordinate system.
Call Generic::setRmax(double val) after converting val from unit to geometrical units.
val | rmax_ expressed in unit "unit"; |
unit | string... |
void Gyoto::Astrobj::Disk3D::setVelocity | ( | double * | pattern | ) |
Set Disk3D::velocity__.
The pointer is copied directly, not the array content.
This is a low-level function. Beware that:
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virtualinherited |
Transmission: exp( αν * dsem )
transmission() computes the transmission of this fluid element or 0 if optically thick. The default implementation returns 1. (no attenuation) if optically thin, 0. if optically thick.
nuem | frequency in the fluid's frame |
coord | Photon coordinate |
dsem | geometrical length in geometrical units |
Reimplemented in Gyoto::Astrobj::PatternDisk, Gyoto::Astrobj::PolishDoughnut, Gyoto::Astrobj::Torus, and Gyoto::Astrobj::Disk3D_BB.
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virtualinherited |
Set rmax_set_ to 0.
getRmax() will then be free to recompute rmax_. Astrobjs which cache rmax_ may need to update it when unsetRmax() is called.
Reimplemented in Gyoto::Astrobj::Star.
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private |
Physical quantity yielding emission.
An array of dimensionality double[nr_][nz_][nphi_][nnu_]. In FITS format, the first dimension is nu, the second phi, the third z and last r. It typically contains temperature and is used only by subclasses.
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protectedinherited |
Kind of object (e.g. "Star"...)
The kind should match the name of the class, e.g. "Star" for a Gyoto::Star.
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private |
Number of times the pattern should be repeated to cover [0, 2Π].
XML elment: <RepeatPhi>. FITS keyword: HIERARCH GYOTO Disk3D RepeatPhi
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protectedinherited |
Maximum distance to the center of the coordinate system [geometrical units].
Maximum distance from the center of the coordinate system at which a photon may hit the object. Child classes may choose to update rmax at all time or to use it to cache the value, for instance when getRmax() is called. External classes (Photons in particular) must use getRmax() to access this information.
rmax_set_==1 means that rmax_ was set using setRmax() or the constructor. In this case, getRmax() must always return this value, not recompute it.
rmax_ is in geometrical units.
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protectedinherited |
Never recompute rmax: it was externally set.
rmax_set_==1 means that rmax_ was set using setRmax() or the constructor. In this case, getRmax() must always return this value, not recompute it.
Use unsetRmax() to reset rmax_set_ to 0.
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private |
Velocity(r, z, phi)
An array of dimensionality double[nr_][nz_][nphi_][3]. In FITS format, the second dimension is phi, the third z and last r. The first plane in the first FITS dimention is dphi/dt, the second dz/dt the last dr/dt.