4 papers
On the effect of gravitational repulsion on geodesic deviation in the Schwarzschild-de Sitter spacetime
Rohit Ghosh, Biplab Raychaudhuri, Aditya S. Mondal +1
Here we discuss the effect of gravitational repulsion on geodesic deviation in the Schwarzschild-de Sitter spacetime. In particular, the geodesic deviation shows different behaviou…
Emergent gravity from nonlinear perturbation of spherical accretion with variable adiabatic index
Rohit Ghosh, Souvik Ghose, Biplab Raychaudhuri +2
The main aim of the present work is to demonstrate that the analogue gravity phenomena are not an artifact of linear perturbation, rather gravity-like effects emerge through the no…
Relativistic X-ray reflection from the accreting millisecond X-ray pulsar IGR J17498-2921
Mahasweta Bhattacharya, Aditya S. Mondal, Mayukh Pahari +3
The accreting millisecond X-ray pulsar IGR J17498-2921 went into X-ray outburst on April 13-15, 2023, for the first time since its discovery on August 11, 2011. Here, we report on…
NuSTAR view of the X-ray transients Swift J174805.3-244637 and IGR J17511-3057
Aditya S. Mondal, Mahasweta Bhattacharya, Mayukh Pahari +3
We report on the NuSTAR observations of the neutron star low-mass X-ray binary Swift J174805.3-244637 (hereafter Swift~J17480) and the accreting millisecond X-ray pulsar IGR~J17511…