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Related papers: HERO: A 3D General Relativistic Radiative Postproc…

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We describe HEROIC, an upgraded version of the relativistic radiative post-processor code HERO described in a previous paper, but which now Includes Comptonization. HEROIC models Comptonization via the Kompaneets equation, using a quadratic…

High Energy Astrophysical Phenomena · Physics 2016-01-27 Ramesh Narayan , Yucong Zhu , Dimitrios Psaltis , Aleksander Sadowski

HERO (Highly Eccentric Relativity Orbiter) is a space-based mission concept aimed to perform several tests of post-Newtonian gravity around the Earth with a preferably drag-free spacecraft moving along a highly elliptical path fixed in its…

General Relativity and Quantum Cosmology · Physics 2019-07-08 Lorenzo Iorio

The High-Energy Ray Observatory (HERO) is a space experiment based on a heavy ionization calorimeter for direct study of cosmic rays. The effective geometrical factor of the apparatus varies from 12 to 60 m$^2$sr for protons depending on…

High Energy Astrophysical Phenomena · Physics 2023-06-26 Alexander Kurganov , Dmitry Karmanov , Alexander Panov , Dmitry Podorozhny , Leonid Tkachev , Andrey Turundaevsky

(Abridged) We here continue our effort to model the behaviour of matter when orbiting or accreting onto a generic black hole by developing a new numerical code employing advanced techniques geared solve the equations of in…

High Energy Astrophysical Phenomena · Physics 2017-02-01 Zakaria Meliani , Yosuke Mizuno , Hector Olivares , Oliver Porth , Luciano Rezzolla , Ziri Younsi

The Event Horizon Telescope (EHT) has recently released high-resolution images of accretion flows onto two supermassive black holes. Our physical understanding of these images depends on accuracy and precision of numerical models of plasma…

Instrumentation and Methods for Astrophysics · Physics 2023-03-08 Monika Moscibrodzka , Aristomenis Yfantis

This paper presents HERO (Hierarchical Testing with Rabbit Optimization), a novel black-box adversarial testing framework for evaluating the robustness of deep learning-based Prognostics and Health Management systems in Industrial…

Machine Learning · Computer Science 2025-10-20 Jinwei Hu , Zezhi Tang , Xin Jin , Benyuan Zhang , Yi Dong , Xiaowei Huang

With the recent demand of deploying neural network models on mobile and edge devices, it is desired to improve the model's generalizability on unseen testing data, as well as enhance the model's robustness under fixed-point quantization for…

Machine Learning · Computer Science 2021-11-26 Huanrui Yang , Xiaoxuan Yang , Neil Zhenqiang Gong , Yiran Chen

We present the black hole accretion code (BHAC), a new multidimensional general-relativistic magnetohydrodynamics module for the MPI-AMRVAC framework. BHAC has been designed to solve the equations of ideal general-relativistic…

General Relativity and Quantum Cosmology · Physics 2017-06-20 Oliver Porth , Hector Olivares , Yosuke Mizuno , Ziri Younsi , Luciano Rezzolla , Monika Moscibrodzka , Heino Falcke , Michael Kramer

We examine radiation and its effects on accretion disks orbiting astrophysical black holes. These disks are thermally radiating and can be geometrically and optically thin or thick. In this first paper of the series, we discuss the physics…

Instrumentation and Methods for Astrophysics · Physics 2022-12-06 Leela Elpida Koutsantoniou

We present a numerical method which evolves a two-temperature, magnetized, radiative, accretion flow around a black hole, within the framework of general relativistic radiation magnetohydrodynamics. As implemented in the code KORAL, the gas…

High Energy Astrophysical Phenomena · Physics 2017-01-18 A. Sadowski , M. Wielgus , R. Narayan , D. Abarca , J. C. McKinney , A. Chael

We present a full 360 degree (i.e., 4$\pi$ steradian) general-relativistic ray-tracing and radiative transfer calculations of accreting supermassive black holes. We perform state-of-the-art three-dimensional general relativistic…

High Energy Astrophysical Phenomena · Physics 2018-11-21 Jordy Davelaar , Thomas Bronzwaer , Daniel Kok , Ziri Younsi , Monika Mościbrodzka , Heino Falcke

Observational efforts to image the immediate environment of a black hole at the scale of the event horizon benefit from the development of efficient imaging codes that are capable of producing synthetic data, which may be compared with…

High Energy Astrophysical Phenomena · Physics 2018-09-06 Thomas Bronzwaer , Jordy Davelaar , Ziri Younsi , Monika Mościbrodzka , Heino Falcke , Michael Kramer , Luciano Rezzolla

Current state-of-the-art simulations of accretion flows onto black holes require a significant level of numerical sophistication, in order to allow the three-dimensional modelling of relativistic magnetised plasma in a regime of strong…

High Energy Astrophysical Phenomena · Physics 2018-10-09 Matteo Bugli

Numerical simulation of magnetohydrodynamic (MHD) turbulence makes it possible to study accretion dynamics in detail. However, special effort is required to connect inflow dynamics (dependent largely on angular momentum transport) to…

Astrophysics · Physics 2011-02-11 Scott C. Noble , Julian H. Krolik , John F. Hawley

We study the effect of radiative feedback on accretion onto intermediate mass black holes (IMBHs) using the hydrodynamical code ZEUS-MP with a radiative transfer algorithm. In this paper, the first of a series, we assume accretion from a…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 KwangHo Park , Massimo Ricotti

In this paper we report on recent upgrades to our general relativistic radiation magnetohydrodynamics code, Cosmos++, including the development of a new primitive inversion scheme and a hybrid implicit-explicit solver with a more general…

Instrumentation and Methods for Astrophysics · Physics 2015-06-22 P. Chris Fragile , Ally Olejar , Peter Anninos

We present results of the detailed dust energy balance study for the seven large edge-on galaxies in the HEROES sample using 3D radiative transfer (RT) modelling. Based on available optical and near-infrared observations of the HEROES…

Generation-driven world models create immersive virtual environments but suffer slow inference due to the iterative nature of diffusion models. While recent advances have improved diffusion model efficiency, directly applying these…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Quanjian Song , Xinyu Wang , Donghao Zhou , Jingyu Lin , Cunjian Chen , Yue Ma

Accreting supermassive black holes are sources of polarized radiation that propagates through highly curved spacetime before reaching the observer. In order to help interpret observations of such polarized emission, accurate and efficient…

High Energy Astrophysical Phenomena · Physics 2020-10-20 Thomas Bronzwaer , Ziri Younsi , Jordy Davelaar , Heino Falcke

HYPERION is a new three-dimensional dust continuum Monte-Carlo radiative transfer code that is designed to be as generic as possible, allowing radiative transfer to be computed through a variety of three-dimensional grids. The main part of…

Instrumentation and Methods for Astrophysics · Physics 2011-12-07 Thomas P. Robitaille
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