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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/*
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* This file is part of libcxxsupport.
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*
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* libcxxsupport is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* libcxxsupport is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libcxxsupport; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* libcxxsupport is being developed at the Max-Planck-Institut fuer Astrophysik
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* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
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* (DLR).
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*/
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/*! \file lsconstants.h
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* Mathematical, physical and technical constants for LevelS.
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*/
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#ifndef PLANCK_CONSTANTS_H
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#define PLANCK_CONSTANTS_H
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/*! \defgroup mathconstgroup Mathematical constants */
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/*! \{ */
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const double pi=3.141592653589793238462643383279502884197;
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const double twopi=6.283185307179586476925286766559005768394;
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const double inv_twopi=1.0/twopi;
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const double fourpi=12.56637061435917295385057353311801153679;
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const double halfpi=1.570796326794896619231321691639751442099;
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const double inv_halfpi=0.6366197723675813430755350534900574;
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const double inv_sqrt4pi = 0.2820947917738781434740397257803862929220;
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const double ln2 = 0.6931471805599453094172321214581766;
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const double inv_ln2 = 1.4426950408889634073599246810018921;
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const double ln10 = 2.3025850929940456840179914546843642;
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const double onethird=1.0/3.0;
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const double twothird=2.0/3.0;
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const double fourthird=4.0/3.0;
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const double degr2rad=pi/180.0;
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const double arcmin2rad=degr2rad/60;
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const double rad2degr=180.0/pi;
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//! Ratio between FWHM and sigma of a Gauss curve (\f$\sqrt{8\ln2}\f$).
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const double sigma2fwhm=2.3548200450309493; // sqrt(8*log(2.))
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const double fwhm2sigma=1/sigma2fwhm;
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/*! \} */
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/*! \defgroup physconstgroup Physical constants */
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/*! \{ */
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const double Jansky2SI=1.0e-26;
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const double SI2Jansky=1.0e+26;
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//! Light speed in m/s (CODATA 2006)
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const double speedOfLight=2.99792458e8;
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//! Boltzmann's constant in J/K (CODATA 2006)
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const double kBoltzmann=1.3806504e-23;
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//! Stefan-Boltzmann constant in W/m^2/K^4 (CODATA 2006)
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const double sigmaStefanBoltzmann=5.6704e-8;
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//! Planck's constant in J s (CODATA 2006)
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const double hPlanck=6.62606896e-34;
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//! Astronomical unit in m
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const double astronomicalUnit=1.49597870691e11;
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//! Solar constant in W/m^2
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const double solarConstant=1368.0;
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//! Average CMB temperature in K (Mather et al. 1999, ApJ 512, 511)
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const double tcmb = 2.725;
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//! offset (in seconds) between Jan 1, 1958 and Jan 1, 1970
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const double sec_58_70 = 378691200.;
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/*! \} */
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#endif
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