Work

Frequency shift in binary microlensing

Year: 2024

Type: article

Abstract: ABSTRACT Gravitational microlensing with binary lensing is one of the channels for detecting exoplanets. Due to the degeneracy of the lens parameters for the binary microlensing, additional features such as parallax and finite-size effects need to identify the lens parameters. The frequency-shift effect as the relativistic analogy of the gravity assist for the photons, is an extra observation that provides additional constraint between the lens parameters. In this work, we extend the application of the frequency-shift effect to binary microlensing and derive the frequency shift during the lensing and caustic crossing. The frequency shift for the binary lens is of the order of ${\Delta \nu }/{\nu }\sim 10^{-12}$. We also investigate the feasibility of detecting this effect by employing cross-correlation methods.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stae1938

Authors: Samaneh Sarbaz, Sohrab Rahvar

Institution: Sharif University of Technology

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,012

OpenAlex ID: W4401598014

FWCI:

Cites: 45

Cited by:

Related to: 10