Revisiting timelike geodesics in the Fisher-Janis-Newman-Winicour-Wyman spacetime

Understand

We investigate the timelike geodesics and the periapsis precession of orbits in the Fisher-Janis-Newman-Winicour-Wyman spacetime.

• This spacetime represents the naked singularity spacetime in the Einstein-massless scalar system.
• We revisit the results in the previous studies and relax the assumptions about the eccentricity of a bound orbit and the size of a semilatus.
• We find that the negative periapsis precession occurs when the spacetime sufficiently deviates from the Schwarzschild spacetime.