/************************************************************************************* * * hernquistmodel.cpp: relizes Hernquist's model * * Copyright (c) 2007 Jakub Schwarzmeier * University of West Bohemia, Department of General Physics * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * ************************************************************************/ #include "../includes.h" #include "../../../inc/ics/hernquistmodel.h" CHernquistModel::CHernquistModel(void) { m_name = "HernquistModel"; } double CHernquistModel::rho( double r ) { if (r == 0) return 0; return ( m_totalMass / ( 2.0 * M_PI * pow(m_a,3) ) ) * ( ( pow( m_a, 4 ) / ( r * pow( r + m_a, 3) ) )); }