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d_profil.c
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Thu, Jan 2, 18:30

d_profil.c
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#include<stdio.h>
#include<math.h>
#include<fonction.h>
#include<constant.h>
#include<dimension.h>
#include<structure.h>
/****************************************************************/
/* programme d_profil.c */
/* auteur Henri Bonnet */
/* place OMP */
/* date 12.11.1991 */
/* version 1 */
/****************************************************************
* d_profil(x,y,k)
* double x,y,k;
*
* evalue, en (x,y), la fonction:
* f(x,y)=Io/(1+alpha**2*(e**2*(x-C.x)**2+(y-C.y)**2))
* k est l'indice de l'objet qu'on integre
*
* les parametres sont definis dans "para"
* alpha=1/(e*l)
*/
double d_profil(double x, double y, const struct galaxie *gal)
{
double xx, yy, xxx, yyy;
double res;
const extern struct g_observ O;
const extern struct g_large L;
res = 0;
if (gal->c == 's')
{
xx = x - gal->C.x;
yy = y - gal->C.y;
xxx = xx * xx + yy * yy;
res = 100 * exp((-1.) * xxx / O.r0st);
}
else if (L.vitesse == 0 || gal->type == 0 )
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
res = 1. + (xx * xx + yy * yy);
if (gal->mag > 0)
res = pow(10., (26. - gal->mag) / 2.5) / res;
else
res = gal->I0 / res;
}
else if (L.vitesse == 1 || gal->type == 1 )
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
if (xx*xx + yy*yy < 3.)
{
res = gal->I0 * sqrt(fabs(yy));
if (yy < 0.)
res = -res;
}
}
/* Exponential Disk Profile */
else if (L.vitesse == 2 || gal->type == 2 )
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
res =exp(sqrt(xx * xx + yy * yy));
if (gal->mag > 0)
res = pow(10., (26. - gal->mag) / 2.5) / res;
else
res = gal->I0 / res;
}
/* 2D Gaussian */
else if (L.vitesse == 3 || gal->type == 3 )
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
res = exp(0.5*(xx * xx + yy * yy));
if (gal->mag > 0)
{
//res = pow(10., (26. - gal->mag) / 2.5) / res;
//mag AB Oke 1983 (B. Clement 2011)
//magnitude given in catalogue corresponds to the peak of the gaussian in source plan
//TODO: should be the integral
//flux in image is uJy
res = pow(10.,(-0.4*(gal->mag+48.57)))/1E-23/1E-6 / res;
}
else
res = gal->I0 / res;
}
/* Sersic */
else if (L.vitesse == 4 || gal->type == 4 )
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
res = exp(pow(xx * xx + yy * yy, 0.5/gal->var1));
if (gal->mag > 0)
res = pow(10., (26. - gal->mag) / 2.5) / res;
else
res = gal->I0 / res;
}
// Uniform disk at gal->I0 within radius R
else if (L.vitesse == 5 || gal->type == 5)
{
xx = ((x - gal->C.x) * sin(gal->E.theta) - (y - gal->C.y) * cos(gal->E.theta)) / gal->E.b;
yy = ((y - gal->C.y) * sin(gal->E.theta) + (x - gal->C.x) * cos(gal->E.theta)) / gal->E.a;
if ( xx + yy < gal->E.a * gal->E.b )
res = pow(10., (26. - gal->mag) / 2.5);
else
res = 0.;
}
else
{
fprintf(stderr, "ERROR: source %s brightness profil type %d unknown\n", gal->n, gal->type);
exit(1);
}
return(res);
}

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