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We study the evolution of primordial black holes (PBHs) formed in the early universe in the presence of a surrounding thermal bath. By incorporating the effects of thermal absorption, we show that PBHs can undergo significant mass growth,…

宇宙学与河外天体物理 · 物理学 2026-01-26 Md Riajul Haque , Rajesh Karmakar , Yann Mambrini

Accurately estimating and forecasting human body pose is important for enhancing the user's sense of immersion in Augmented Reality. Addressing this need, our paper introduces EgoCast, a bimodal method for 3D human pose forecasting using…

计算机视觉与模式识别 · 计算机科学 2024-12-05 Maria Escobar , Juanita Puentes , Cristhian Forigua , Jordi Pont-Tuset , Kevis-Kokitsi Maninis , Pablo Arbelaez

One of the most pressing questions in cosmology is how the black holes (BHs) powering quasars at high redshift grow to supermassive scales within a billion years of the Big Bang. Here we show that sustained super-Eddington accretion can be…

星系天体物理 · 物理学 2022-08-31 Jarrett Lawrence Johnson , Phoebe R. Upton Sanderbeck

The Black Hole Explorer (BHEX) is a proposed mission to launch a sub-millimeter radio telescope into Earth orbit that will take the sharpest images in the history of astronomy and reveal novel horizon-scale features of supermassive black…

广义相对论与量子宇宙学 · 物理学 2026-03-09 Roman Berens , Dominic O. Chang , Trevor Gravely , Alexandru Lupsasca

We present a ``cyclic zoom'' method to capture the dynamics of accretion flows onto black holes across a vast range of spatial and temporal scales in general relativistic magnetohydrodynamic (GRMHD) simulations. In this method, we…

高能天体物理现象 · 物理学 2025-07-10 Minghao Guo , James M. Stone , Eliot Quataert , Volker Springel

Accreting black holes are sources of major interest in astronomy, particular those launching jets because of their ability to accelerate particles, and dramatically affect their surrounding environment up to very large distances. The…

高能天体物理现象 · 物理学 2022-12-12 M. Lucchini , C. Ceccobello , S. Markoff , Y. Kini , A. Chhotray , R. M. T. Connors , P. Crumley , H. Falcke , D. Kantzas , D. Maitra

Accurate weather forecasting across time scales is critical for anticipating and mitigating the impacts of climate change. Recent data-driven methods based on deep learning have achieved significant success in the medium range, but struggle…

Interferometers, such as the Event Horizon Telescope (EHT), do not directly observe the images of sources but rather measure their Fourier components at discrete spatial frequencies up to a maximum value set by the longest baseline in the…

高能天体物理现象 · 物理学 2020-04-15 Dimitrios Psaltis , Lia Medeiros , Tod R. Lauer , Chi-Kwan Chan , Feryal Ozel

It is well established that supermassive black hole (SMBH) feedback is crucial for regulating the evolution of massive, if not all, galaxies. However, modelling the interplay between SMBHs and their host galaxies is challenging due to the…

星系天体物理 · 物理学 2024-07-04 Sophie Koudmani , Rachel S. Somerville , Debora Sijacki , Martin A. Bourne , Yan-Fei Jiang , Kasar Profit

As the earliest relics of star formation episodes of the Universe, the most massive galaxies are the key to our understanding of the stellar population, cosmic structure, and SMBH evolution. However, the details of their formation histories…

星系天体物理 · 物理学 2023-09-19 Dieu D. Nguyen , Michele Cappellari , Miguel Pereira-Santaella

The Event Horizon Telescope (EHT) recently released the first linearly polarized images of the accretion flow around the supermassive black hole Messier 87*, hereafter \m{}. The spiraling polarization pattern found in EHT images favored…

高能天体物理现象 · 物理学 2022-04-20 Daniel C. M. Palumbo , George N. Wong

With the forthcoming VLBI images of Sgr A* and M87, simulations of accretion flows onto black holes acquire a special importance to aid with the interpretation of the observations and to test the predictions of different accretion…

广义相对论与量子宇宙学 · 物理学 2019-10-09 Hector Olivares , Oliver Porth , Yosuke Mizuno

Early JWST observations are providing growing evidence for a ubiquitous population of accreting supermassive black holes (BHs) at high redshift, many of which appear overmassive compared to the empirically-derived local scaling relation…

Accretion onto supermassive black holes (BHs) can launch relativistic jets that inject energy and momentum into their surroundings. Understanding how such feedback shapes large-scale accretion is key to bridging observations from galactic…

高能天体物理现象 · 物理学 2025-06-02 Aretaios Lalakos , Alexander Tchekhovskoy , Elias R. Most , Bart Ripperda , Koushik Chatterjee , Matthew Liska

Black hole jets represent one of the most extreme manifestations of astrophysical processes, linking accretion physics, relativistic magnetohydrodynamics, and large-scale feedback in galaxies and clusters. Despite decades of observational…

高能天体物理现象 · 物理学 2026-02-12 Andre L. B. Ribeiro , Nathalia M. N. da Rocha

In this third paper of a series, we study the growth and luminosity of black holes (BHs) in motion with respect to their surrounding medium. We run a large set of two-dimensional (2D) axis-symmetric simulations to explore a large parameter…

宇宙学与河外天体物理 · 物理学 2015-06-12 KwangHo Park , Massimo Ricotti

We construct a holographic map that takes the semi-classical state of an evaporating black hole and its Hawking radiation to a microscopic model that reflects the scrambling dynamics of the black hole. The microscopic model is given by a…

高能物理 - 理论 · 物理学 2024-01-18 Zsolt Gyongyosi , Timothy J. Hollowood , S. Prem Kumar , Andrea Legramandi , Neil Talwar

There is increasing evidence that globular clusters retain sizeable black hole populations at present day. This is supported by dynamical simulations of cluster evolution, which have unveiled the spatial distribution and mass spectrum of…

高能天体物理现象 · 物理学 2021-08-18 Nicholas Kaaz , Kyle Kremer , Katie Auchettl , Enrico Ramirez-Ruiz

High dynamic range imaging (HDRI) for real-world dynamic scenes is challenging because moving objects may lead to hybrid degradation of low dynamic range and motion blur. Existing event-based approaches only focus on a separate task, while…

计算机视觉与模式识别 · 计算机科学 2024-04-05 Li Xiaopeng , Zeng Zhaoyuan , Fan Cien , Zhao Chen , Deng Lei , Yu Lei

Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, usually either the statistical power of such simulations or…