3 papers
astro-ph.GA2025
Gravitational lensing of fast radio bursts: prospects for probing microlens populations in lensing galaxies
Ashish Kumar Meena, Prasenjit Saha
Gravitational lensing by a stellar microlens of mass forms two images separated by micro-arcseconds on the sky and has a time delay of seconds…
gr-qc2025
Interference patterns for simple lens models in wave-optics regime
Ashish Kumar Meena
This work studies interference patterns created by simple lens models (point mass, Chang-Refsdal, and binary lens) in the wave optics regime, primarily in the context of lensing of…
astro-ph.GA2024
Image formation near hyperbolic umbilic in strong gravitational lensing
Ashish Kumar Meena, Jasjeet Singh Bagla
Hyperbolic umbilic (HU) is a point singularity of the gravitational lens equation, giving rise to a ring-shaped image formation made of four highly magnified images, off-centred fr…