Programme

P.103 -- Poster, VCTP-44

Date: Thursday, 1 August 2019

Time: 08:30 - 10:00

Gravitational waves for a central gravitational field in an f(R)-theory of gravitation

Pham Van Ky, Nguyen Thi Hong Van and Nguyen Anh Ky

Institute of physics, VAST

While a spherically symmetric vacuum solution of the Einstein equation is always stationary, a spherically symmetric vacuum solution of an f(R)-theory of gravitation is not necessary stationary. This may have interesting consequences. In comparison with the general theory of relativity (GR), a planet's orbital precession or a trajectory deflection of light now get a correction which is a constant for a static central field and varies with time for a non-static central field even from a source of a constant mass, unlike the corresponding Einstein’s values in the GR not changing in the same circumstance. In particular, a spherical symmetrical source can radiate gravitational waves. This phenomenon cannot happen in the GR.

Presenter: Nguyen Anh Ky