28 citations · 78 across the 29 of their papers we have counts for
10 papers · 1 filter
Analysis of radial and quasiradial oscillations in quark stars for different equations of state
Nivamani Rajbongshi, Umananda Dev Goswami
We investigate quark stars (QSs) described by three quark matter (QM)equations of state (EoSs) and analyse their radial and quasiradial oscillation modes within the slowly rotating…
Lensing Signatures of a Primary Hair Black Hole Solution
Rahul Das, Umananda Dev Goswami
We investigate the weak and strong field gravitational lensing of light by a primary hair black hole (BH) solution obtained within the framework of the gravitational decoupling (GD…
NuSTAR View of the 2025 Mini-Outburst of the Black Hole X-ray Binary GRS 1739-278: Spectral and Timing Evolution in the Soft State
Arshad Hussain, Umananda Dev Goswami
We present a dedicated timing and spectral analysis of three NuSTAR observations of the Galactic black hole candidate GRS 1739-278 obtained during the decay of its 2025 mini-outbur…
Reconstructing the Auger UHECR Dipole: A Hybrid Analysis of 4LAC AGNs and Nearby Starburst Galaxies
Swaraj Pratim Sarmah, Umananda Dev Goswami, Sovan Chakraborty
The large-scale dipole anisotropy observed by the Pierre Auger Observatory above ~EeV provides important clues about the origin of ultra-high-energy cosmic rays (UHECRs). In thi…
Five-Dimensional Traversable Wormholes in Einstein-Gauss-Bonnet Gravity with a Cloud of Strings
Jaydeep Goswami, Umananda Dev Goswami
We present an exact static and spherically symmetric traversable wormhole solution in 5D Einstein-Gauss-Bonnet (EGB) gravity supported by a Letelier cloud of strings. The physicall…
A systematic comparison of green valley selection criteria across multiparameter spaces using a homogeneous ultraviolet-optical dataset
Pius Privatus, Umananda Dev Goswami
We present a systematic comparison of commonly adopted green valley (GV) selection criteria by examining their distributions across multiple observational and physical parameter sp…
Strong field lensing and shadows of gravity black holes
Rahul Das, Umananda Dev Goswami
We investigate the strong field lensing of light by black holes (BHs)emerging in theory of gravity, which is an extension of gravity theory by including…
Probing CDM-mimicking gravity model using gravitational waves from compact binary coalescences
Sikha Gogoi, Umananda Dev Goswami
The direct detection of gravitational waves (GWs) is a very significant achievement in the history of physics and has opened a new window to probe the possible deviations of physic…
Traversable wormholes in gravity: Energy conditions, stability and quasinormal modes
Jaydeep Goswami, Rupam Jyoti Borah, Umananda Dev Goswami
We investigate static and spherically symmetric traversable wormhole solutions in the framework of gravity by considering a power-law model of the form . By ad…
Perturbative Renormalisation Group Improved Black Hole Solution and its Quasinormal Modes
Rupam Jyoti Borah, Umananda Dev Goswami
In this work, we construct a perturbative black hole (BH) solution motivated by renormalization group (RG) improvement and investigate the quasinormal modes (QNMs) of the BH under…