## File: lsconstants.h

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healpix-cxx 3.50.0-3
 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293 /* * This file is part of libcxxsupport. * * libcxxsupport 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. * * libcxxsupport 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 libcxxsupport; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* * libcxxsupport is being developed at the Max-Planck-Institut fuer Astrophysik * and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt * (DLR). */ /*! \file lsconstants.h * Mathematical, physical and technical constants for LevelS. */ #ifndef PLANCK_CONSTANTS_H #define PLANCK_CONSTANTS_H /*! \defgroup mathconstgroup Mathematical constants */ /*! \{ */ const double pi=3.141592653589793238462643383279502884197; const double twopi=6.283185307179586476925286766559005768394; const double inv_twopi=1.0/twopi; const double fourpi=12.56637061435917295385057353311801153679; const double halfpi=1.570796326794896619231321691639751442099; const double inv_halfpi=0.6366197723675813430755350534900574; const double inv_sqrt4pi = 0.2820947917738781434740397257803862929220; const double ln2 = 0.6931471805599453094172321214581766; const double inv_ln2 = 1.4426950408889634073599246810018921; const double ln10 = 2.3025850929940456840179914546843642; const double onethird=1.0/3.0; const double twothird=2.0/3.0; const double fourthird=4.0/3.0; const double degr2rad=pi/180.0; const double arcmin2rad=degr2rad/60; const double rad2degr=180.0/pi; //! Ratio between FWHM and sigma of a Gauss curve (\f$\sqrt{8\ln2}\f$). const double sigma2fwhm=2.3548200450309493; // sqrt(8*log(2.)) const double fwhm2sigma=1/sigma2fwhm; /*! \} */ /*! \defgroup physconstgroup Physical constants */ /*! \{ */ const double Jansky2SI=1.0e-26; const double SI2Jansky=1.0e+26; //! Light speed in m/s (CODATA 2006) const double speedOfLight=2.99792458e8; //! Boltzmann's constant in J/K (CODATA 2006) const double kBoltzmann=1.3806504e-23; //! Stefan-Boltzmann constant in W/m^2/K^4 (CODATA 2006) const double sigmaStefanBoltzmann=5.6704e-8; //! Planck's constant in J s (CODATA 2006) const double hPlanck=6.62606896e-34; //! Astronomical unit in m const double astronomicalUnit=1.49597870691e11; //! Solar constant in W/m^2 const double solarConstant=1368.0; //! Average CMB temperature in K (Fixsen, ApJ 709 (2009), arXiv:0911.1955) const double tcmb = 2.72548; //! offset (in seconds) between Jan 1, 1958 and Jan 1, 1970 const double sec_58_70 = 378691200.; /*! \} */ #endif