3 papers
gr-qc2026
Primordial Black Holes: A Review of Formation and Evolution
S. Shankaranarayanan, Soumya Bhattacharya, Archit Vidyarthi
Primordial Black Holes (PBHs) have emerged as a leading non-particulate candidate for dark matter and a unique cosmological probe, a paradigm shift accelerated by the detection of…
gr-qc2025
Effect of dark matter halo environment on GW memory signal
Soumya Bhattacharya, Chiranjeeb Singha
In this paper, we study the gravitational wave (GW) memory effect for a black hole embedded in a dark matter halo described by a Hernquist-type density profile, both with and witho…
gr-qc2025
Probing Chaos in Schwarzschild-de Sitter Spacetime: The Role of Black Hole and Cosmological Horizons
Surojit Dalui, Soumya Bhattacharya, Chiranjeeb Singha
In this paper, we study the motion of a massless, chargeless particle in Schwarzschild-de Sitter spacetime, revealing exponential radial growth and potential chaos in an integrable…