Schwarzschild Geometry Utilities

einsteinpy.utils.schwarzschild_utils.schwarzschild_radius(mass)

Schwarzschild radius is the radius defining the event horizon of a Schwarzschild black hole. It is characteristic radius associated with every quantity of mass.

Parameters

mass (kg) –

Returns

r – Schwarzschild radius for a given mass

Return type

m

einsteinpy.utils.schwarzschild_utils.time_velocity(pos_vec, vel_vec, mass)

Velocity of time calculated from einstein’s equation. See http://www.physics.usu.edu/Wheeler/GenRel/Lectures/GRNotesDecSchwarzschildGeodesicsPost.pdf

Parameters

• pos_vector (array) – Vector with r, theta, phi components in SI units

• vel_vector (array) – Vector with velocities of r, theta, phi components in SI units

• mass (kg) – Mass of the body

Returns

Velocity of time

Return type

one