Influences of Dark Energy and dark matter on Gravitational Time Advancement

Abstract

The effect of dark matter/energy on gravitational time advancement (negative effective time delay) has been investigated considering few dark energy/matter models including cosmological constant. It is found that dark energy gives only (positive) gravitational time delay irrespective of the position of the observer whereas pure Schwarzschild geometry leads to gravitational time advancement when the observer is situated at relatively stronger gravitational field point in the light trajectory. Consequently, there will be no time advancement effect at all at radial distances where gravitational field due to dark energy is stronger than the gravitational field of Schwarzschild geometry.

7 pages, no figure

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• Probing dark matter and dark energy through Gravitational Time Advancement
• Gravitational time advancement effect in Bumblebee gravity for Earth bound systems
• Effects of dark energy and flat rotation curve on the gravitational time delay of particle with non-zero mass
• Can a regular black hole be observationally distinguished from singular black holes as spinning lens partner in PSR-BH binaries?