3 citations · 8 across the 13 of their papers we have counts for
13 papers
Testing Black Holes with Interstellar Missions: II. Flyby Probes
Yi Fan, Cosimo Bambi, Leda Gao +2
Recently, we demonstrated that while an interstellar mission to the nearest black hole remains highly speculative and extraordinarily challenging, it is not entirely implausible wi…
Dense, multi-phase accretion disk atmosphere in the low-luminosity state of black hole transientV4641 Sgr
Zuobin Zhang, Rob Fender, James H. Matthews +11
We present soft X-ray spectroscopy of the black-hole X-ray binary V4641~Sgr with the \textit{XMM-Newton} Reflection Grating Spectrometer (RGS). The RGS spectrum shows narrow emissi…
Cosmological Constraints on Minimal Cubic Galileon Models in Teleparallel Gravity
Akbar Davlataliev, Abdurakhmon Nosirov, Odil Yunusov +2
Cubic Galileon cosmological models provide a well-motivated framework for investigating late-time cosmic acceleration beyond the standard CDM paradigm. In this work, we study ob…
Testing Black Holes with Interstellar Missions: I. Orbiting Probes
Leda Gao, Cosimo Bambi, Yi Fan +3
Recently, we showed that the possibility of an interstellar mission to the closest black hole, while highly speculative and extremely challenging, is not completely unrealistic wit…
Searching for Isolated Black Hole Candidates within 15 pc of the Solar System in Gaia DR3
Abdurakhmon Nosirov, Cosimo Bambi, Leda Gao +4
Theoretical models predict that the Galaxy hosts - black holes formed from the complete gravitational collapse of heavy stars and that most of these black holes are iso…
Assessing systematic uncertainties from spectral re-analysis of Cyg X-1 with different coronal geometries
Abdurakhmon Nosirov, Jiachen Jiang, Cosimo Bambi +1
In this work, we carry out a new spectral reanalysis of NuSTAR and Suzaku observations of the disk reflection spectra in the stellar-mass black hole X-ray binary Cyg~X-1. We compar…
Assessing the Power-Law Emissivity Assumption in X-ray Reflection Spectroscopy: A Simulation-Based Evaluation of Different Coronal Geometries
Songcheng Li, Abdurakhmon Nosirov, Cosimo Bambi +3
The emissivity profile assumed in X-ray reflection spectroscopy significantly impacts black hole spin measurements. Using simulated NuSTAR spectra generated for lamppost and disk-l…
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…
Probing the Strong Gravity Region of Black Holes with eXTP
Qingcui Bu, Cosimo Bambi, Lijun Gou +42
We present the novel capabilities of the enhanced X-ray Timing and Polarimetry (eXTP) mission to study the strong gravity region around stellar-mass black holes in X-ray binary sys…
Gauge invariant perturbations in teleparallel Horndeski gravity
Bobomurat Ahmedov, Maria Caruana, Jackson Levi Said +4
We present in the form of a catalogue of the cosmological perturbations within the Bahamonde- Dialektopoulos-Levi Said (BDLS) theory, which serves as the teleparallel counterpart o…
Stable bouncing solutions in Teleparallel Horndeski gravity: violations of the no-go theorem
Bobomurat Ahmedov, Konstantinos F. Dialektopoulos, Jackson Levi Said +3
In order to have singularity-free solutions at the beginning of the Universe, we need to violate the null energy condition. In the general class of Horndeski gravity, there are hea…
Gravitational analogue of radiation reaction in STVG
B. Turimov, A. Nosirov, A. Abdujabbarov
We have studied influence of STVG in circular motion of massive particle around the Schwarzschild-MOG black hole and discussed the Innermost Stable Circular Orbit (ISCO) and Margin…
Cosmological Perturbations in the Teleparallel analog of Horndeski gravity
Bobomurat Ahmedov, Konstantinos F. Dialektopoulos, Jackson Levi Said +3
In this work we study the cosmological perturbations in Bahamonde-Dialektopoulos-Levi Said (BDLS) theory, i.e. the teleparallel analog of Horndeski gravity. In order to understand…