145 citations · 1.3k across the 55 of their papers we have counts for
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Testing relativistic reflection models with GRMHD simulations of accreting black holes
Swarnim Shashank, Shafqat Riaz, Askar B. Abdikamalov +1
X-ray reflection spectroscopy is currently one of the leading techniques for studying the inner part of accretion disks around black holes, measuring black hole spins, and even tes…
Probing bumblebee gravity with black hole X-ray data
Jiale Gu, Shafqat Riaz, Askar B. Abdikamalov +2
Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can pote…
Testing regular black holes with X-ray and GW data
Shafqat Riaz, Swarnim Shashank, Rittick Roy +5
The presence of spacetime singularities in physically relevant solutions of the Einstein Equations is normally interpreted as a symptom of the breakdown of classical general relati…
Impact of ionization and electron density gradients in X-ray reflection spectroscopy measurements
Gitika Mall, Ashutosh Tripathi, Askar B. Abdikamalov +1
The models currently used for the analysis of the reflection spectra of black holes usually assume a disk with constant ionization and electron density. However, there is some deba…
Black Hole Spin Measurements Based on a Thin Disc Model with Finite Thickness I. An example study of MCG-06-30-15
Jiachen Jiang, Askar B. Abdikamalov, Cosimo Bambi +1
We present a re-analysis of the XMM-Newton and NuSTAR observing campaign for the well-studied, X-ray-bright AGN MCG-06-30-15. In particular, we consider a disc model with finite th…
Observational appearance of Kaluza-Klein black holes
Temurbek Mirzaev, Askar B. Abdikamalov, Ahmadjon A. Abdujabbarov +3
The optical properties of rotating black holes in Kaluza-Klein theory described by the total mass, spin, and electric and magnetic charges are investigated in detail. Using a devel…