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g_mass.c
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Sun, Dec 29, 08:58

g_mass.c
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#include<stdio.h>
#include<signal.h>
#include<string.h>
#include<math.h>
#include<fonction.h>
#include<constant.h>
#include<dimension.h>
#include<structure.h>
#include<lt.h>
/****************************************************************/
/* nom: g_mass */
/* auteur: Jean-Paul Kneib */
/* date: 10/02/92 */
/* place: Toulouse */
/****************************************************************/
typedef void (*sighandler_t)(int);
static void computeKmap(int ny, int nx, double dx, double dy, double **map, double zl, double zs);
static void signalReset(int);
static int interrupt; // Global variable
void g_mass(int imass, int np, double zl, double zs, char *file)
{
const extern struct g_mode M;
const extern struct g_frame F;
const extern struct g_cosmo C;
const extern struct pot lens[];
double dl0s, dos;
double **mass; // mass map
int nx, ny; // image size
double dx, dy;
double dlsds, dl, dcrit, dcritA, conv;
register int i, j;
if (imass == 1)
{
if( zl == 0 )
NPRINTF(stderr, "COMP: projected kappa map for z_s=%.3lf =>%s\n", zs, file);
else
NPRINTF(stderr, "COMP: kappa map for z_l=%.3lf and z_s=%.3lf =>%s\n", zl, zs, file);
}
else if (imass == 2)
{
if( zl == 0 )
NPRINTF(stderr, "COMP: projected absolute mass map in g/cm2 (normalized at z_l=%.3lf) =>%s\n", lens[0].z, file);
else
NPRINTF(stderr, "COMP: absolute mass map in g/cm2 for z_l=%.3lf =>%s\n", zl, file);
}
else if ( imass == 3)
{
if( zl == 0 )
NPRINTF(stderr, "COMP: projected absolute mass map in 10^12 Msol/pixel (normalized at z_l=%.3lf) =>%s\n", lens[0].z, file);
else
NPRINTF(stderr, "COMP: absolute mass map in 10^12 Msol/pixel for z_l=%.3lf =>%s\n", zl, file);
}
else if (imass == 4)
{
if( zl == 0 )
NPRINTF(stderr, "COMP: projected absolute mass map in 10^12 Msol/kpc2 (normalized at z_l=%.3lf) =>%s\n", lens[0].z, file);
else
NPRINTF(stderr, "COMP: absolute mass map in 10^12 Msol/kpc2 for z_l=%.3lf =>%s\n", zl, file);
}
else
{
NPRINTF(stderr,
"ERROR: mass keyword modifier %d in runmode section unknown\n", imass);
return;
}
// Parse errors
if ( np == 0 )
{
fprintf(stderr, "ERROR: mass map size set to 0\n");
exit(1);
}
if( zl >= zs )
{
fprintf(stderr, "ERROR: lens plane redshift z_l=%.3lf larger than source plane redshift z_s=%.3lf\n", zl, zs);
exit(1);
}
// Initialise the mass map(ny,nx)
nx = np;
ny = (int) (nx / (F.xmax - F.xmin) * (F.ymax - F.ymin));
dx = (F.xmax - F.xmin) / (nx - 1);
dy = (F.ymax - F.ymin) / (ny - 1);
NPRINTF(stderr, "dx:%lf dy:%lf\n", dx, dy);
mass = (double **) alloc_square_double(ny, nx);
// Compute the convergence map
computeKmap(ny, nx, dx, dy, mass, zl, zs);
// Convert from convergence to the final map type
if( zl == 0 )
zl = lens[0].z;
dlsds = dratio(zl, zs);
dl = distcosmo1(zl);
dcrit = cH4piG * C.h / dl / dlsds; // in g/cm^2
dcritA = cH0_4piG * C.h / dl / dlsds; // in 10^12 M_sol/kpc^2
conv = MCRIT12 / C.h * dx * dy * dl / dlsds; // in 10^12 M_sol/pixel
for (j = 0; j < ny; j++)
for (i = 0; i < nx; i++)
{
if ( imass == 2 )
mass[j][i] *= dcrit;
else if ( imass == 3 )
mass[j][i] *= conv;
else if ( imass == 4 )
mass[j][i] *= dcritA;
}
// Write the mass maps
if ( M.iref > 0 )
wrf_fits_abs(file, mass, nx, ny, F.xmin, F.xmax, F.ymin, F.ymax, M.ref_ra, M.ref_dec);
else
wrf_fits(file, mass, nx, ny, F.xmin, F.xmax, F.ymin, F.ymax);
// Free the arrays
free_square_double(mass, ny);
}
/* Return a convergence map of size npxnp in pixels
*/
static void computeKmap(int ny, int nx, double dx, double dy, double **map, double zl, double zs)
{
const extern struct g_grille G;
const extern struct g_frame F;
const extern struct g_mode M;
const extern struct pot lens[];
struct point pi;
struct matrix grad2;
int i, j;
long int ilens;
double oldz, dls;
// Compute dls for lens[0].z (default for projected kappa)
dls = distcosmo2(lens[0].z, zs);
oldz = lens[0].z;
// For kappa at a given redshift
if( zl != 0 )
{
dls = distcosmo2(zl, zs);
oldz = zl;
}
for ( ilens = 0; ilens < G.nlens; ilens ++)
{
if( lens[ilens].z >= zs )
{
NPRINTF(stderr, "WARN: Skip potential %ld at z_l=%.3lf larger than z_s=%.3lf\n", ilens, lens[ilens].z, zs);
continue;
}
if( zl != 0 && lens[ilens].z != zl )
continue;
printf( "INFO: Compute map for lens %ld/%ld\r", ilens, G.nlens); fflush(stdout);
// This is for projected kappa
if( lens[ilens].z != oldz )
{
dls = distcosmo2(lens[ilens].z, zs);
oldz = lens[ilens].z;
}
for (j = 0; j < ny; j++)
{
pi.y = j * dy + F.ymin;
for (i = 0; i < nx; i++)
{
pi.x = i * dx + F.xmin;
grad2 = e_grad2_pot(&pi, ilens);
map[j][i] += 0.5 * (grad2.a + grad2.c) * dls;
}
}
}
// Renormalize everything by DOS
double dos = distcosmo1(zs);
for( j = 0; j < ny; j++ )
for( i = 0; i < nx; i++ )
map[j][i] /= dos;
}
static void signalReset(int param)
{
interrupt = 1;
signal(SIGINT, SIG_DFL);
}

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