Line data    Source code

       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : namespace gr::surfaces {
       7              : /*!
       8              :  * \ingroup SurfacesGroup
       9              :  * \brief Irreducible mass of a 2D `Strahlkorper`.
      10              :  *
      11              :  * \details See Eqs. (15.38) \cite Hartle2003gravity. This function computes the
      12              :  * irreducible mass from the area of a horizon. Specifically, computes
      13              :  * \f$M_\mathrm{irr}=\sqrt{\frac{A}{16\pi}}\f$.
      14              :  */
      15            1 : double irreducible_mass(double area);
      16              : 
      17              : /*!
      18              :  * \ingroup SurfacesGroup
      19              :  * \brief Christodoulou Mass of a 2D `Strahlkorper`.
      20              :  *
      21              :  * \details See e.g. Eq. (1) of \cite Lovelace2016uwp.
      22              :  * This function computes the Christodoulou mass from the dimensionful
      23              :  * spin angular momentum \f$S\f$ and the irreducible mass \f$M_{irr}\f$
      24              :  * of a black hole horizon. Specifically, computes
      25              :  *\f$M=\sqrt{M_{irr}^2+\frac{S^2}{4M_{irr}^2}}\f$
      26              :  */
      27            1 : double christodoulou_mass(double dimensionful_spin_magnitude,
      28              :                           double irreducible_mass);
      29              : }  // namespace gr::surfaces