YNOGKM: Timelike geodesics in the KerrNewmann Spacetime calculations
Abstract
YNOGKM (YunNan observatories geodesic in a KerrNewman spacetime for massive particles) performs fast calculation of timelike geodesics in the KerrNewman (KN) spacetime; it is a direct extension of <a hred="http://www.ascl.net/1305.008">YNOGK</a> (YunNan observatories geodesic Kerr) calculating null geodesics in a Kerr spacetime. The four BoyerLindquis coordinates and proper time are expressed as functions of a parameter p semianalytically by using the Weierstrass' and Jacobi's elliptic functions and integrals. The elliptic integrals are computed by Carlson's elliptic integral method, which guarantees the fast speed of the code. The source Fortran file ynogkm.f90 contains three modules: constants, rootfind, ellfunction, and blcoordinates.
 Publication:

Astrophysics Source Code Library
 Pub Date:
 March 2014
 Bibcode:
 2014ascl.soft03012Y
 Keywords:

 Software