Results 51 to 60 of about 102,046 (339)

Stellar black holes: cosmic history and feedback at the dawn of the universe

, 2010
Significant historic cosmic evolution for the formation rate of stellar black holes is inferred from current theoretical models of the evolution of massive stars, the multiple observations of compact stellar remnants in the near and distant universe, and
I. Felix Mirabel, Le Floc'h, Meynet, Mirabel, Roberston, Romero   +5 more
core   +1 more source

The Quiescent X-ray Spectrum of Accreting Black Holes [PDF]

, 2014
The quiescent state is the dominant accretion mode for black holes on all mass scales. Our knowledge of the X-ray spectrum is limited due to the characteristic low luminosity in this state.
Cackett, Edward M., Degenaar, Nathalie, Miller, Jon M., Reis, Rubens C., Reynolds, Mark T.   +4 more
core   +1 more source

High‐Temperature Oxidation of the CrFeNi Medium‐Entropy Alloy

Advanced Engineering Materials, EarlyView.
The oxidation behavior of equiatomic CrFeNi MEA is a key issue that determines this material's suitability for high‐temperature application. The understanding of long‐term behavior is even more crucial than short‐term corrosion effects. The alloy is exposed to synthetic air at 1000, 1050, and 1100 °C for 24, 100, and 1000 h and systematically compared ...
Anna Maria Manzoni, Wencke Mohring, Mike Schneider, Guillaume Laplanche, Sebastian Peter Hagen, Christiane Stephan‐Scherb   +5 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

The cloud of gas falling toward the central black hole in the milky way

EPJ Web of Conferences, 2012
The cloud of gas that will pass within 200AU of the central black hole of our Galaxy in 2013 may be generated by a disk around an old, low-mass star that was created in a tidal encounter with one of the stellar black holes that are expected to accumulate
Miralda-Escudé J.
doaj   +1 more source

Development and Preliminary In Vivo Study of 3D‐Printed Bioactive Glass Scaffolds with Trabecular Architecture

Advanced Engineering Materials, EarlyView.
This study reports the fabrication of trabecular bioactive glass scaffolds (composition “1d”: 46.1SiO2‐28.7CaO‐8.8MgO‐6.2P2O5‐5.7CaF2‐4.5Na2O wt%) through vat photopolymerization and the relevant results from mechanical testing and in vivo implantation procedures in rabbit femora, showing great promise for bone tissue engineering applications.
Dilshat Tulyaganov, Roberta Gabrieli, Avzal Akbarov, Nigora Nigmatova, Bekhzod Khabilov, Alessandro Schiavi, Martin Schwentenwein, Enrica Verné, Francesco Baino   +8 more
wiley   +1 more source

Supermassive Black Hole Growth in Hierarchically Merging Nuclear Star Clusters

The Astrophysical Journal
Supermassive black holes are prevalent at the centers of massive galaxies, and their masses scale with galaxy properties, increasing evidence suggesting that these trends continue to low stellar masses.
Konstantinos Kritos, Ricarda S. Beckmann, Joseph Silk, Emanuele Berti, Sophia Yi, Marta Volonteri, Yohan Dubois, Julien Devriendt   +7 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

Astrophysical evidence for the existence of black holes [PDF]

, 1999
Following a short account of the history of the idea of black holes, we present a review of the current status of the search for observational evidence of their existence aimed at an audience of relativists rather than astronomers or astrophysicists.
A Celotti, Abramowicz M A, Bahcall J N, Bergmann P G, Blandford R D, Blandford R D, Blandford R D, Blandford R D, Blandford R D, Bradt H V D, Carr B J, Carter B, Charles P A, D W Sciama, Eckart A, Eddington A S, Einstein A, Einstein A, Fabian A C, Fabian A C, Fabian A C, Haensel P, Harrison B K, Hawking S W, Hawking S W, Hawking S W, Israel W, J C Miller, Krolik J H, Laplace P S 1796, Lemaître G, Lodge O, Lynden-Bell D, Menou K, Michell J 1784, Miyoshi M, Prendergast K H, Rees M J, Rees M J, Richstone D O, Rothschild R E E, Schutz B F, Schwarzschild K, Shahbaz T, Shahbaz T, Shahbaz T, Shklovskii I S, Tanaka Y, van der Marel R   +48 more
core   +2 more sources

An Overview of Jets and Outflows in Stellar Mass Black Holes [PDF]

, 2014
In this article, we will briefly review the current empirical understanding of the relation between accretion state and outflows in accreting stellar mass black holes. The focus will be on the empirical connections between X-ray states and relativistic (‘
R. Fender, E. Gallo
semanticscholar   +1 more source