Results 71 to 80 of about 63,717 (334)

Counting Black Holes: The Cosmic Stellar Remnant Population and Implications for LIGO

, 2017
We present an empirical approach for interpreting gravitational wave signals of binary black hole mergers under the assumption that the underlying black hole population is sourced by remnants of stellar evolution.
Bullock, James S., Elbert, Oliver D., Kaplinghat, Manoj   +2 more
core   +1 more source

Massive black holes in stellar systems: 'quiescent' accretion and luminosity [PDF]

, 2011
Only a small fraction of local galaxies harbor an accreting black hole, classified as an active galactic nucleus (AGN). However, many stellar systems are plausibly expected to host black holes, from globular clusters to nuclear star clusters, to massive ...
Campbell, Duncan, Dotti, Massimo, Mateo, Mario, Volonteri, Marta   +3 more
core   +1 more source

Natal kicks of stellar-mass black holes [PDF]

Proceedings of Gamma-Ray Bursts 2012 Conference — PoS(GRB 2012), 2012
Contains fulltext : 295708.pdf (Publisher’s version ) (Open Access)
Davies, M.B., Repetto, S., Sigurdsson, S.   +2 more
openaire   +2 more sources

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

A Supermassive Black Hole in an Ultracompact Dwarf Galaxy

, 2014
Ultracompact dwarf galaxies (UCDs) are among the densest stellar systems in the universe. These systems have masses up to 200 million solar masses, but half light radii of just 3-50 parsecs.
Baumgardt, Holger, Bosch, Remco van den, Brodie, Jean, Brok, Mark den, Chilingarian, Igor, Frank, Matthias, Hilker, Michael, McDermid, Richard, Mieske, Steffen, Neumayer, Nadine, Seth, Anil, Spitler, Lee, Strader, Jay, Walsh, Jonelle L.   +13 more
core   +1 more source

Populations of Stellar-mass Black Holes from Binary Systems [PDF]

The Astrophysical Journal, 2019
Abstract In large and complicated stellar systems like galaxies, it is difficult to predict the number and characteristics of a black hole (BH) population. Such populations may be modeled as an aggregation of homogeneous (i.e., having uniform star formation history and the same initial chemical composition) stellar populations.
Grzegorz Wiktorowicz, Łukasz Wyrzykowski, Martyna Chruslinska, Jakub Klencki, Krzysztof A. Rybicki, Krzysztof Belczynski   +5 more
openaire   +3 more sources

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

Dynamics Around Supermassive Black Holes: Extreme-mass-ratio Inspirals as Gravitational-wave Sources

The Astrophysical Journal
Supermassive black holes and their surrounding dense stellar environments nourish a variety of astrophysical phenomena. We focus on the distribution of stellar-mass black holes around the supermassive black hole and the consequent formation of extreme ...
Barak Rom, Itai Linial, Karamveer Kaur, Re’em Sari   +3 more
doaj   +1 more source

Dark fluxes from accreting black holes through several mechanisms

European Physical Journal C: Particles and Fields, 2022
We discuss the possibility that accreting black hole systems can be sources for dark matter flux through several different mechanisms. We firstly discuss two types of systems‘: coronal thermal plasmas around supermassive black holes in active galactic ...
Rong-Gen Cai, Sichun Sun, Bing Zhang, Yun-Long Zhang   +3 more
doaj   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source