Astrophysical Condition on the attolensing as a possible probe for a modified gravity theory

TL;DR

This paper explores how wave effects in attolensing by tiny black holes can serve as a probe for modified gravity theories, considering finite source size and relative motion effects to identify observable signatures.

Contribution

It demonstrates the astrophysical conditions under which attolensing wave signatures can indicate deviations from general relativity in braneworld scenarios.

Findings

Finite source size significantly affects interference patterns.

Relative motion alters the detectability of wave effects.

Conditions identified for observable signatures in astrophysical systems.

Abstract

We investigate the wave effect in the gravitational lensing by a black hole with very tiny mass less than 10^-19 solar mass, which is called attolensing, motivated by a recent report that the lensing signature might be a possible probe of a modified gravity theory in the braneworld scenario. We focus on the finite source size effect and the effect of the relative motion of the source to the lens, which are influential to the wave effect in the attolensing. Astrophysical condition that the lensed interference signature can be a probe of the modified gravity theory is demonstrated. The interference signature in the microlensing system is also discussed.