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prunevoids now can handle coordinate changes to cosmoving space in observations

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This commit is contained in:
P.M. Sutter 2013-08-23 13:13:55 -05:00
parent 46b9d3ec40
commit 7ba3b2a98d
3 changed files with 79 additions and 7 deletions
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75
c_tools/stacking/pruneVoids.cpp
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@ -43,6 +43,8 @@
#include "assert.h"
#include "voidTree.hpp"
#include "loadZobov.hpp"
#include <gsl/gsl_integration.h>
#include <gsl/gsl_interp.h>
#define LIGHT_SPEED 299792.458
#define MPC2Z 100./LIGHT_SPEED
@ -82,6 +84,32 @@ typedef struct voidStruct {
float ellip;
} VOID;
// this defines the expansion function that we will integrate
// Laveaux & Wandelt (2012) Eq. 24
struct my_expan_params { double Om; double w0; double wa; };
double expanFun (double z, void * p) {
struct my_expan_params * params = (struct my_expan_params *)p;
double Om = (params->Om);
double w0 = (params->w0);
double wa = (params->wa);
//const double h0 = 1.0;
const double h0 = 0.71;
double ez;
double wz = w0 + wa*z/(1+z);
ez = Om*pow(1+z,3) + (1.-Om);
//ez = Om*pow(1+z,3) + pow(h0,2) * (1.-Om)*pow(1+z,3+3*wz);
ez = sqrt(ez);
//ez = sqrt(ez)/h0;
ez = 1./ez;
return ez;
}
void openFiles(string outputDir, string sampleName,
string prefix, string dataPortion,
int mockIndex, int numKept,
@ -127,7 +155,34 @@ int main(int argc, char **argv) {
return 1;
}
int i, p, p2, numPartTot, numZonesTot, dummy, iVoid, iZ;
// initialize cosmology integrator and interpolator
gsl_function expanF;
expanF.function = &expanFun;
struct my_expan_params expanParams;
expanParams.Om = 0.27;
expanParams.w0 = -1.0;
expanParams.wa = 0.0;
expanF.params = &expanParams;
double result, error;
size_t nEval;
int iZ, numZ = 4000;
double maxZ = 2.0, z, *dL, *redshifts;
dL = (double *) malloc(numZ * sizeof(double));
redshifts = (double *) malloc(numZ * sizeof(double));
for (iZ = 0; iZ < numZ; iZ++) {
z = iZ * maxZ/numZ;
gsl_integration_qng(&expanF, 0.0, z, 1.e-6, 1.e-6, &result, &error, &nEval);
dL[iZ] = result*LIGHT_SPEED/100.;
//printf("HERE %e %e\n", z, dL[iZ]);
redshifts[iZ] = z;
}
gsl_interp *interp = gsl_interp_alloc(gsl_interp_linear, 4000);
gsl_interp_init(interp, dL, redshifts, numZ);
gsl_interp_accel *acc = gsl_interp_accel_alloc();
int i, p, p2, numPartTot, numZonesTot, dummy, iVoid;
int numVoids, mockIndex;
double tolerance;
FILE *fp;
@ -541,11 +596,21 @@ int main(int argc, char **argv) {
pow(voids[iVoid].barycenter[1] - boxLen[1]/2.,2) +
pow(voids[iVoid].barycenter[2] - boxLen[2]/2.,2));
voids[iVoid].redshiftInMpc = voids[iVoid].redshiftInMpc;
redshift = voids[iVoid].redshiftInMpc;
nearestEdge = fabs(redshift-args.zMax_arg*LIGHT_SPEED/100.);
if (args.useLCDM_flag) {
redshift = gsl_interp_eval(interp, dL, redshifts,
voids[iVoid].redshiftInMpc, acc);
//printf("HELLO %e %e\n", redshift, args.zMax_arg);
nearestEdge = fabs((redshift-args.zMax_arg)*LIGHT_SPEED/100.);
voids[iVoid].redshift = redshift;
} else {
redshift = voids[iVoid].redshiftInMpc;
nearestEdge = fabs(redshift-args.zMax_arg*LIGHT_SPEED/100.);
voids[iVoid].redshift = voids[iVoid].redshiftInMpc/LIGHT_SPEED*100.;
}
//nearestEdge = fmin(fabs(redshift-args.zMin_arg*LIGHT_SPEED/100.),
// fabs(redshift-args.zMax_arg*LIGHT_SPEED/100.));
voids[iVoid].redshift = voids[iVoid].redshiftInMpc/LIGHT_SPEED*100.;
} else {
@ -844,7 +909,7 @@ void openFiles(string outputDir, string sampleName,
fprintf(*fpSkyPositions, "# RA, dec, redshift, radius (Mpc/h), void ID\n");
*fpShapes = fopen((outputDir+"/"+prefix+"shapes_"+dataPortion+"_"+sampleName).c_str(), "w");
fprintf(*fpShapes, "# void ID, eig(1), eig(2), eig(3), eigv(1)-x, eiv(1)-y, eigv(1)-z, eigv(2)-x, eigv(2)-y, eigv(2)-z, eigv(3)-x, eigv(3)-y, eigv(3)-z\n");
fprintf(*fpShapes, "# void ID, ellip, eig(1), eig(2), eig(3), eigv(1)-x, eiv(1)-y, eigv(1)-z, eigv(2)-x, eigv(2)-y, eigv(2)-z, eigv(3)-x, eigv(3)-y, eigv(3)-z\n");
} // end openFiles