Results 131 to 140 of about 170,936 (294)

The Unique Blazar OJ 287 and Its Massive Binary Black Hole Central Engine

Universe, 2019
The bright blazar OJ 287 is the best-known candidate for hosting a nanohertz gravitational wave (GW) emitting supermassive binary black hole (SMBBH) in the present observable universe.
Lankeswar Dey, Achamveedu Gopakumar, Mauri Valtonen, Stanislaw Zola, Abhimanyu Susobhanan, Rene Hudec, Pauli Pihajoki, Tapio Pursimo, Andrei Berdyugin, Vilppu Piirola, Stefano Ciprini, Kari Nilsson, Helen Jermak, Mark Kidger, Stefanie Komossa   +14 more
doaj   +1 more source

BLACK HOLE–NEUTRON STAR COALESCING BINARIES

International Journal of Modern Physics D, 2010
Coalescing black hole–neutron star binaries have been invoked as possible progenitors of short gamma-ray bursts and are also among the most promising gravitational wave sources to be detected by ground-based laser interferometers. When the star is disrupted by tidal interactions before reaching the innermost stable circular orbit, the gravitational ...
FERRARI, Valeria, GUALTIERI, Leonardo, F. Pannarale   +2 more
openaire   +4 more sources

WS2 Optoelectronic Memristive Reservoir Enabling Ultra‐Low‐Power, Multi‐Task, and Environmentally Stable Neuromorphic Computing

Advanced Science, EarlyView.
WS2‐based in‐memory sensing reservoir computing integrates sensing, memory, and computation in one compact device. It achieves ∼94% N‐MNIST, ∼93% eye motion perception, and ∼89% speech recognition with ultra‐low energy (∼25.5 fJ/spike). The system shows stability at 95% humidity, endurance over 1.5M cycles, and supports synaptic plasticity, enabling ...
Dayanand Kumar, Hanrui Li, Divyanshu Divyanshu, Dhananjay D. Kumbhar, Manoj Kumar Rajbhar, Amit Singh, Abdul Momin Syed, Selma Amara, Gianluca Setti, Nazek El‐Atab   +9 more
wiley   +1 more source

Wireless, Adaptable and Fully Implantable Battery‐powered Devices for Optical Stimulation of the Spinal Cord in Small Rodents

Advanced Science, EarlyView.
Current technologies for spinal cord optogenetic stimulation rely on external power sources and face reliability constraints in freely behaving animals. Here, a fully implantable, battery‐powered optoelectronic device is introduced, enabling operation in any selected environment with wireless recharging for months‐long stimulation.
Shahriar Shalileh, Adan Moallemi, Elham Mohseni Vadeghani, Samuel Tretjakov, Brianna Tsuyuki, Alexander Golab, Benjamin Rever, Wolfram Tetzlaff, Dena Shahriari   +8 more
wiley   +1 more source

On the Evolution of Disk-embedded Binaries: Framing Local Models in Global Context

The Astrophysical Journal
The disks of active galactic nuclei (AGNs) have in recent years been recognized as possible sites for gravitational-wave sources, leading to a series of numerical studies on the evolution of disk-embedded black hole binaries.
Philip Kirkeberg, Rixin Li, Martin E. Pessah   +2 more
doaj   +1 more source

Implications of the Spin-Induced Accretion Disk Truncation on the X-ray Binary Broadband Emission

Particles
Black hole X-ray binary systems consist of a black hole accreting mass from its binary companion, forming an accretion disk. As a result, twin relativistic plasma ejections (jets) are launched towards opposite and perpendicular directions.
Theodora Papavasileiou, Odysseas Kosmas, Theocharis Kosmas   +2 more
doaj   +1 more source

Spatially Separated Redox Centers in One‐Dimensional Sp2‐Carbon Covalent Organic Frameworks Enable Synergistic Photocatalytic Palladium Recovery and Bisphenol A Mineralization

Advanced Science, EarlyView.
A one‐dimensional sp2‐carbon covalent organic framework with spatially segregated redox centers integrates a dual photosensitizing system and a cationic interface for synergistic photocatalysis. The material achieves exceptional palladium recovery (1749 mg g−1) and bisphenol A mineralization (0.1710 min−1) without sacrificial agents, demonstrating ...
Yi‐Ru Chen, Jing‐Yi Li, Yao Xiao, Dan Zhong, Lu Zhang, Yu‐Ting Xie, Xiu Wang, Yibao Li, Wei‐Rong Cui, Jian‐Ding Qiu   +9 more
wiley   +1 more source

Black Hole Accretion and Spin-up through Stellar Collisions in Dense Star Clusters

The Astrophysical Journal
Dynamical interactions in dense star clusters could significantly influence the properties of black holes, leaving imprints on their gravitational-wave signatures.
Fulya Kıroğlu, Kyle Kremer, Sylvia Biscoveanu, Elena González Prieto, Frederic A. Rasio   +4 more
doaj   +1 more source

Massive binary black holes in galactic nuclei and their path to coalescence

, 2014
Massive binary black holes form at the centre of galaxies that experience a merger episode. They are expected to coalesce into a larger black hole, following the emission of gravitational waves. Coalescing massive binary black holes are among the loudest
A. Escala, A. Gould, A. Gualandris, A. Heger, A. Marconi, A. Marconi, A. Merloni, A. Sesana, A. Seth, A.E. Reines, A.I. MacFadyen, A.M. Ghez, B. Devecchi, B. Kocsis, B.D. Farris, B.S. Sathyaprakash, C. Montuori, C. Roedig, C. Roedig, D. Chapon, D. Fiacconi, D. Merritt, D. Merritt, D. Merritt, D. Merritt, D. Syer, D.J. D’Orazio, D.R.G. Schleicher, E. Lusso, E.C. Ostriker, F. Governato, F. Özel, F.M. Khan, F.M. Khan, F.M. Khan, F.M. Khan, G. Kulkarni, G. Lodato, G. Taffoni, G.D. Quinlan, H. Tanaka, H.B. Perets, J. Centrella, J. Cuadra, J. Kormendy, J.-M. Shi, J.C. Mihos, J.D. Schnittman, J.E. Pringle, J.F. Navarro, J.M. Bellovary, K. Gültekin, K. Hayasaki, K. Hayasaki, K. Hayasaki, K. Hayasaki, K. Omukai, L. Ferrarese, L. Ferrarese, L. Hoffman, L. Mayer, L. Mayer, L. Rezzolla, L. Valle del, L. Valle del, L. Wang, M. Boylan-Kolchin, M. Colpi, M. Colpi, M. Colpi, M. Dotti, M. Dotti, M. Dotti, M. Dotti, M. Milosavljević, M. Milosavljević, M. Preto, M. Vestergaard, M. Volonteri, M. Volonteri, M. Volonteri, M.C. Begelman, N. Häring, N. Scott, N.I. Shakura, O. Blaes, P. Artymowicz, P. Artymowicz, P. Berczik, P.B. Ivanov, P.F. Hopkins, P.F. Hopkins, P.J. Armitage, P.J. Armitage, P.J. Armitage, Q. Yu, R. Decarli, R.R. Rafikov, S. Callegari, S. Callegari, S. Chandrasekhar, S. Gillessen, S. Kazantzidis, S. Komossa, S. Wassenhove Van, S.C. Noble, S.D.M. White, T. Bode, T. Bogdanović, T. Matteo Di, Z. Haiman   +110 more
core   +1 more source

Memristive Physical Reservoir Computing

Advanced Science, EarlyView.
Memristors’ nonlinear dynamics and input‐dependent memory effects make them ideal candidates for high‐performance physical reservoir computing (RC). Based on their conductance modulation, memristors can be classified as electronic or optoelectronic types.
Dian Jiao, Ziyuan Wang, Jingrui Wang, Li Zhang, Xianhua Wei, Lingxiang Hu, Zongxiao Li, Athanasios V. Vasilakos, Zhizhen Ye, Fei Zhuge   +9 more
wiley   +1 more source