742 citations · 3.1k across the 49 of their papers we have counts for
12 papers · 1 filter
GRMHD beyond Kerr: An extension of the HARM code for thin disks to non-Kerr spacetimes
Sourabh Nampalliwar, Aristomenis I. Yfantis, Kostas D. Kokkotas
Black hole based tests of general relativity have proliferated in recent times with new and improved detectors and telescopes. Modelling of the black hole neighborhood, where most…
Constraining the Konoplya-Rezzolla-Zhidenko deformation parameters II: limits from stellar-mass black hole X-ray data
Zhibo Yu, Qunfeng Jiang, Askar B. Abdikamalov +5
Astrophysical black holes are thought to be the Kerr black holes predicted by general relativity, but macroscopic deviations from the Kerr solution can be expected from a number of…
Constraining the KRZ deformation parameters I: limits from supermassive black hole X-ray data
Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi +2
X-ray reflection spectroscopy is a powerful technique for probing the nature of gravity around black holes in the so-called strong field regime. One of the most popular of such pro…
Modelling the Sgr A* Black Hole Immersed in a Dark Matter Spike
Sourabh Nampalliwar, Saurabh K., Kimet Jusufi +3
In this paper, we investigate the effects of a dark matter (DM) spike on the neighborhood of Sgr A*, the black hole (BH) in the center of the Milky Way galaxy. Our main goal is to…
Towards precision measurements of accreting black holes using X-ray reflection spectroscopy
Cosimo Bambi, Laura W. Brenneman, Thomas Dauser +14
Relativistic reflection features are commonly observed in the X-ray spectra of accreting black holes. In the presence of high quality data and with the correct astrophysical model,…
Testing the Keplerian disk hypothesis using X-ray reflection spectroscopy
Ashutosh Tripathi, Biao Zhou, Askar B. Abdikamalov +3
The Novikov-Thorne model is the standard framework for the description of geometrically thin and optically thick accretion disks around black holes and is widely used to study the…
Shining X-rays on asymptotically safe quantum gravity
Biao Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg +3
Asymptotically safe quantum gravity is a promising candidate scenario to provide a UV extension for the effective quantum field theory of Einstein's gravity. The theory has its fou…
Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy and a thin disk model with finite thickness
Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi +5
X-ray reflection spectroscopy is a powerful tool for probing the strong gravity region of black holes and can be used for testing general relativity in the strong field regime. Sim…
Modeling bias in supermassive black hole spin measurements
Shafqat Riaz, Dimitry Ayzenberg, Cosimo Bambi +1
X-ray reflection spectroscopy (or iron line method) is a powerful tool to probe the strong gravity region of black holes, and currently is the only technique for measuring the spin…
Reflection spectra of thick accretion disks
Shafqat Riaz, Dimitry Ayzenberg, Cosimo Bambi +1
Relativistic reflection features are commonly observed in the X-ray spectra of stellar-mass and supermassive black holes and originate from illumination of the inner part of the ac…
Accreting Black Holes
Sourabh Nampalliwar, Cosimo Bambi
This chapter provides a general overview of the theory and observations of black holes in the Universe and on their interpretation. We briefly review the black hole classes, accret…
Fundamental Concepts
Cosimo Bambi, Sourabh Nampalliwar
This chapter briefly discusses the fundamental properties of black holes in general relativity, the discovery of astrophysical black holes and their main astronomical observations,…