54 citations · 465 across the 48 of their papers we have counts for
18 papers · 1 filter
Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations
Saurabh, Hendrik Müller, Sebastiano D. von Fellenberg +282
We investigate the presence and spatial characteristics of the jet base emission in M87* at 230 GHz, enabled by the enhanced uv coverage in the 2021 Event Horizon Telescope (EHT) o…
Dynamo and Jet interconnections in GRMHD simulations of black hole accretion disks
P. S. Santhiya, Pallavi Bhat, Prayush Kumar +2
We present global 3D GRMHD simulations of black hole (BH) accretion disks designed to investigate how MRI-driven dynamo action regulates jet formation and evolution. Unlike standar…
High-Order Photon Rings around Kerr Naked Singularities
Hina Suzuki, Yosuke Mizuno, Akhil Uniyal +3
We present a detailed study of higher-order photon rings of an accreting Kerr naked singularity (KNS) with dimensionless spin parameter ; i.e., a horizonless, overly spinni…
The future ability to test theories of gravity with black-hole shadows
Akhil Uniyal, Indu K. Dihingia, Yosuke Mizuno +1
The horizon-scale images of supermassive black holes (BHs) by the Event Horizon Telescope Collaboration (EHT) have provided new opportunities to test general relativity and other t…
GRMHD Study of Accretion onto time-like Naked Singularities
Akhil Uniyal, Indu K. Dihingia, Yosuke Mizuno +1
Naked singularities (NkS) are solutions to the Einstein field equations that violate the cosmic censorship conjecture. Recent studies indicate that these objects may serve as compe…
Imprints of Different Types of Low-Angular-Momentum Accretion Flow Solutions in General Relativistic Hydrodynamic Simulations
Indu K. Dihingia, Akhil Uniyal, Yosuke Mizuno
Depending on the astrophysical source and its environment, the accretion flows can exhibit a variety of behaviors and characteristics in accordance with the type of solutions. We s…
Low Angular Momentum Black Hole Accretion: First GRMHD Evidence of Standing Shocks
Jirong Mao, Indu K. Dihingia, Yosuke Mizuno +1
Understanding the dynamics of low angular momentum accretion flow around black holes (BHs) is essential for probing extreme plasma behavior in strong gravity, where shock formation…
The Physical Origin and Time Lag of Multi-Frequency Flares from SgrA*
Hong-Xuan Jiang, Yosuke Mizuno, Indu K. Dihingia +5
Sagittarius~A, the supermassive black hole at the center of our galaxy, exhibits flares across various wavelengths, yet their origins remain elusive. We performed 3D two-temper…
The Fate of Transonic Shocks around Black Holes and their Future Astrophysical Implications
Indu K. Dihingia, Akhil Uniyal, Yosuke Mizuno
Theoretical models have long predicted the existence of shocks in multi-transonic accretion flows onto a black hole, yet their fate under realistic general relativistic simulations…
Magnetically Driven Retrograde Precession in Misaligned Black Hole Accretion Flows
Hong-Xuan Jiang, Yosuke Mizuno, Dong Lai +2
Observations of accreting black hole (BH) systems, such as microquasars and supermassive black holes, often reveal a precessing jet with changing directions, indicating a misaligne…
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…
Origin of the ring ellipticity in the black hole images of M87*
Rohan Dahale, Ilje Cho, Kotaro Moriyama +273
We investigate the origin of the elliptical ring structure observed in the images of the supermassive black hole M87*, aiming to disentangle contributions from gravitational, astro…
First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA
Ciriaco Goddi, Douglas F. Carlos
We present full-polarization observations at mm (345 GHz) conducted with the Atacama Large Millimeter/submillimeter Array (ALMA) toward Messier 87 (M87) and seven other r…
Emergence of cHz Quasi-Periodic Oscillations from low angular momentum flow onto a supermassive black hole
Indu K. Dihingia, Yosuke Mizuno
Quasi-periodic oscillations (QPOs) are very common in black hole accretion systems that are seen from the modulations in luminosity. Many supermassive black hole sources (e.g., RE…
Thermal Conduction and Thermal-Driven Winds in Magnetized Viscous Accretion Disk Dynamics
Biplob Sarkar, Indu Kalpa Dihingia, Ranjeev Misra
This paper investigates the effects of saturated thermal conduction (TC) and thermal-driven winds (TDWs) on magnetized advection-dominated accretion onto a rotating black hole (BH)…
Black hole accretion and radiation variability in GRMHD simulations with Rezzolla-Zhidenko spacetime
Kotaro Moriyama, Alejandro Cruz-Osorio, Yosuke Mizuno +2
The Event Horizon Telescope (EHT) has revealed the horizon-scale radiation of Sagittarius A* (Sgr A*), our galaxy's central supermassive black hole, offering a new platform to test…
The putative center in NGC 1052
Anne-Kathrin Baczko, Matthias Kadler, Eduardo Ros +284
Many active galaxies harbor powerful relativistic jets, however, the detailed mechanisms of their formation and acceleration remain poorly understood. To investigate the area of je…
A multi-frequency study of sub-parsec jets with the Event Horizon Telescope
Jan Röder, Maciek Wielgus, Andrei P. Lobanov +287
The 2017 observing campaign of the Event Horizon Telescope (EHT) delivered the first very long baseline interferometry (VLBI) images at the observing frequency of 230 GHz, leading…