6 papers
Testing General Relativity with NuSTAR data of Galactic Black Holes : II
Ashutosh Tripathi, Swarnim Shashank, Gitika Mall +1
General relativity predicts the spacetime metric around an astrophysical black hole to be described by the Kerr solution, which is a massive rotating black hole without any residua…
Measuring black hole spins with x-ray reflection spectroscopy: A GRMHD outlook
Swarnim Shashank, Askar B. Abdikamalov, Honghui Liu +4
X-ray reflection spectroscopy has evolved as one of the leading methods to measure black hole spins. However, the question is whether its measurements are subjected to systematic b…
Modeling reflection spectra of super-Eddington X-ray sources
Swarnim Shashank, Askar B. Abdikamalov, Honghui Liu +5
Relativistic reflection is a common feature in the X-ray observations of accreting compact objects. We present reflux, a new X-ray reflection model for spectral analysis of super-E…
Testing Regular Black Holes with X-ray data of GX 339-4
Shafqat Riaz, Michail Kyriazis, Askar B. Abdikamalov +2
Regular black holes are singularity-free black hole spacetimes proposed to solve the problem of the presence of spacetime singularities that plagues the black holes of general rela…
About the accuracy of the relxill/relxill_nk models in view of the next generation of X-ray missions
Honghui Liu, Askar B. Abdikamalov, Temurbek Mirzaev +4
X-ray reflection spectroscopy is a powerful tool to study the strong gravity region of black holes. The next generation of astrophysical X-ray missions promises to provide unpreced…
X-ray spectra of black hole X-ray binaries with returning radiation
Temurbek Mirzaev, Cosimo Bambi, Askar B. Abdikamalov +4
In the disk-corona model, the X-ray spectrum of a stellar-mass black hole in an X-ray binary is characterized by three components: a thermal component from a thin and cold accretio…