4 papers
First Constraints on the Ellipticities of Self-Interacting Fermionic Dark Matter Admixed Neutron Stars from Continuous Gravitational-Wave Searches
Premachand Mahapatra, Andrew L. Miller, Prasanta Kumar Das
We investigate continuous gravitational-wave (CW) emission from rapidly rotating, non-axisymmetric, isolated neutron stars admixed with self-interacting fermionic dark matter (DM)…
Impacts of {} gravity on neutron stars study within the relativistic mean-field model framework in light of GW170817, Pulsars and NICER data
Premachand Mahapatra, Prasanta Kumar Das
In this work, we investigate the neutron star structure in conservative gravity with , where denotes the matter--geometry coupling. The modified stell…
Revealing Dark Matter's Role in Neutron Stars Anisotropy: A Bayesian Approach Using Multi-messenger Observations
Xue-Zhi Liu, Premachand Mahapatra, Chun Huang +3
Dark matter (DM) continues to evade direct detection, but neutron stars (NSs) serve as natural laboratories where even a modest DM component can alter their structure. While many s…
Photon Ring Dimming as a Signature of Photon-Axion Conversion in Janis-Newman-Winicour Naked Singularity
Ayush Hazarika, Premachand Mahapatra, Subhadip Sau
The possible existence of axions in the universe introduces the intriguing possibility of photon-axion conversion in strong magnetic fields, particularly near compact objects like…