/************************************************************************************* * * plummermodel.cpp: realizes Plummer'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/plummermodel.h" CPlummerModel::CPlummerModel() { m_name = "PlummerModel"; } double CPlummerModel::rho( double r ) { return ( m_totalMass / ( 4.0 * M_PI ) ) * ( ( 3.0 * m_a * m_a ) / pow( r * r + m_a * m_a, 5.0 / 2.0 ) ); }