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/*
* Methods of class Hole_bhns to compute global quantities
*
* (see file hole_bhns.h for documentation).
*
*/
/*
* Copyright (c) 2005,2007 Keisuke Taniguchi
*
* This file is part of LORENE.
*
* LORENE is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* LORENE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
char hole_bhns_global_C[] = "$Header: /cvsroot/Lorene/C++/Source/Hole_bhns/hole_bhns_global.C,v 1.5 2014/10/13 08:53:00 j_novak Exp $" ;
/*
* $Id: hole_bhns_global.C,v 1.5 2014/10/13 08:53:00 j_novak Exp $
* $Log: hole_bhns_global.C,v $
* Revision 1.5 2014/10/13 08:53:00 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.4 2014/10/06 15:13:10 j_novak
* Modified #include directives to use c++ syntax.
*
* Revision 1.3 2008/07/02 21:10:15 k_taniguchi
* A bug removed.
*
* Revision 1.2 2008/05/15 19:07:26 k_taniguchi
* Introduction of the quasilocal spin angular momentum.
*
* Revision 1.1 2007/06/22 01:25:15 k_taniguchi
* *** empty log message ***
*
*
* $Header: /cvsroot/Lorene/C++/Source/Hole_bhns/hole_bhns_global.C,v 1.5 2014/10/13 08:53:00 j_novak Exp $
*
*/
// C++ headers
//#include <>
// C headers
#include <cmath>
// Lorene headers
#include "hole_bhns.h"
#include "unites.h"
#include "utilitaires.h"
//-----------------------------------------//
// Irreducible mass of BH //
//-----------------------------------------//
namespace Lorene {
double Hole_bhns::mass_irr_bhns() const {
// Fundamental constants and units
// -------------------------------
using namespace Unites ;
if (p_mass_irr_bhns == 0x0) { // a new computation is required
Scalar psi4(mp) ;
psi4 = pow(confo_tot, 4.) ;
psi4.std_spectral_base() ;
psi4.annule_domain(0) ;
psi4.raccord(1) ;
double radius_ah = mp.val_r(1,-1.,M_PI/2.,0.) ;
Map_af& mp_aff= dynamic_cast<Map_af&>(mp) ;
double a_ah = mp_aff.integrale_surface(psi4, radius_ah) ;
double mirr = sqrt(a_ah/16./M_PI) / ggrav ;
p_mass_irr_bhns = new double( mirr ) ;
}
return *p_mass_irr_bhns ;
}
//----------------------------------------------------------//
// Quasilocal spin angular momentum of BH //
//----------------------------------------------------------//
double Hole_bhns::spin_am_bhns(const Tbl& xi_i, const double& phi_i,
const double& theta_i, const int& nrk_phi,
const int& nrk_theta) const {
// Fundamental constants and units
// -------------------------------
using namespace Unites ;
if (p_spin_am_bhns == 0x0) { // a new computation is required
double mass = ggrav * mass_bh ;
Scalar rr(mp) ;
rr = mp.r ;
rr.std_spectral_base() ;
Scalar st(mp) ;
st = mp.sint ;
st.std_spectral_base() ;
Scalar ct(mp) ;
ct = mp.cost ;
ct.std_spectral_base() ;
Scalar sp(mp) ;
sp = mp.sinp ;
sp.std_spectral_base() ;
Scalar cp(mp) ;
cp = mp.cosp ;
cp.std_spectral_base() ;
Vector ll(mp, CON, mp.get_bvect_cart()) ;
ll.set_etat_qcq() ;
ll.set(1) = st % cp ;
ll.set(2) = st % sp ;
ll.set(3) = ct ;
ll.std_spectral_base() ;
double radius_ah = mp.val_r(1,-1.,M_PI/2.,0.) ;
if (kerrschild) {
cout << "Not yet prepared!!!" << endl ;
abort() ;
}
else { // Isotropic coordinates
// Sets C/M^2 for each case of the lapse boundary condition
// --------------------------------------------------------
double cc ;
if (bc_lapconf_nd) { // Neumann boundary condition
if (bc_lapconf_fs) { // First condition
// d(\alpha \psi)/dr = 0
// ---------------------
cc = 2. * (sqrt(13.) - 1.) / 3. ;
}
else { // Second condition
// d(\alpha \psi)/dr = (\alpha \psi)/(2 rah)
// -----------------------------------------
cc = 4. / 3. ;
}
}
else { // Dirichlet boundary condition
if (bc_lapconf_fs) { // First condition
// (\alpha \psi) = 1/2
// -------------------
cout << "!!!!! WARNING: Not yet prepared !!!!!" << endl ;
abort() ;
}
else { // Second condition
// (\alpha \psi) = 1/sqrt(2.) \psi_KS
// ----------------------------------
cout << "!!!!! WARNING: Not yet prepared !!!!!" << endl ;
abort() ;
// cc = 2. * sqrt(2.) ;
}
}
Scalar r_are(mp) ;
r_are = r_coord(bc_lapconf_nd, bc_lapconf_fs) ;
r_are.std_spectral_base() ;
// Killing vector of the spherical components
Vector killing_spher(mp, COV, mp.get_bvect_spher()) ;
killing_spher.set_etat_qcq() ;
killing_spher = killing_vect(xi_i, phi_i, theta_i,
nrk_phi, nrk_theta) ;
killing_spher.std_spectral_base() ;
killing_spher.set(2) = confo_tot * confo_tot * radius_ah
* killing_spher(2) ;
killing_spher.set(3) = confo_tot * confo_tot * radius_ah
* killing_spher(3) ;
// killing_spher(3) is already divided by sin(theta)
killing_spher.std_spectral_base() ;
// Killing vector of the Cartesian components
Vector killing(mp, COV, mp.get_bvect_cart()) ;
killing.set_etat_qcq() ;
killing.set(1) = (killing_spher(2) * ct * cp - killing_spher(3) * sp)
/ radius_ah ;
killing.set(2) = (killing_spher(2) * ct * sp + killing_spher(3) * cp)
/ radius_ah ;
killing.set(3) = - killing_spher(2) * st / radius_ah ;
killing.std_spectral_base() ;
// Surface integral <- dzpuis should be 0
// --------------------------------------
// Source terms in the surface integral
Scalar source_1(mp) ;
source_1 = (ll(1) * (taij_tot_rs(1,1) * killing(1)
+ taij_tot_rs(1,2) * killing(2)
+ taij_tot_rs(1,3) * killing(3))
+ ll(2) * (taij_tot_rs(2,1) * killing(1)
+ taij_tot_rs(2,2) * killing(2)
+ taij_tot_rs(2,3) * killing(3))
+ ll(3) * (taij_tot_rs(3,1) * killing(1)
+ taij_tot_rs(3,2) * killing(2)
+ taij_tot_rs(3,3) * killing(3)))
/ pow(confo_tot, 4.) ;
source_1.std_spectral_base() ;
source_1.dec_dzpuis(2) ; // dzpuis : 2 -> 0
Scalar source_2(mp) ;
source_2 = -2. * pow(confo_tot, 3.) * mass * mass * cc
* sqrt(1. - 2.*mass/r_are/rr + cc*cc*pow(mass/r_are/rr,4.))
* (ll(1)*killing(1) + ll(2)*killing(2) + ll(3)*killing(3))
/ lapconf_tot / pow(r_are*rr, 3.) ;
source_2.std_spectral_base() ;
Scalar source_surf(mp) ;
source_surf = source_1 + source_2 ;
source_surf.std_spectral_base() ;
source_surf.annule_domain(0) ;
source_surf.raccord(1) ;
Map_af& mp_aff= dynamic_cast<Map_af&>(mp) ;
double spin = mp_aff.integrale_surface(source_surf, radius_ah) ;
double spin_angmom = 0.5 * spin / qpig ;
p_spin_am_bhns = new double( spin_angmom ) ;
}
}
return *p_spin_am_bhns ;
}
}
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