Results 141 to 150 of about 816,543 (343)

Measuring spin of a supermassive black hole at the Galactic centre -- Implications for a unique spin

, 2010
We determine the spin of a supermassive black hole in the context of discseismology by comparing newly detected quasi-periodic oscillations (QPOs) of radio emission in the Galactic centre, Sagittarius A* (Sgr A*), as well as infrared and X-ray emissions ...
Abramowicz, Baganoff, Bardeen, Bardeen, Beskin, Blandford, Bélanger, Gammie, Genzel, Ghez, Gierliński, Gillessen, H. Negoro, Hamaus, Hawley, Hirose, Homan, Kato, Kato, Kato, Kato, Kato, King, M. Miyoshi, Machida, Markowitz, McKinney, Moderski, Novikov, Nowak, Okazaki, Orosz, Page, R. Matsumoto, R. Takahashi, Remillard, Schödel, Shakura, Shapiro, Takahashi, Volonteri, Wilson, Y. Kato, Yuan, Yusef-Zadeh   +44 more
core   +1 more source

Universal thermodynamic topological classes of rotating black holes

Physics Letters B
In a recent study, Wei et al. (2024) [96] proposed a universal classification scheme that interprets black hole solutions, including the four-dimensional Schwarzschild, Reissner-Nordström (RN), Schwarzschild-AdS, and RN-AdS black hole solutions, as ...
Xiao-Dan Zhu, Wentao Liu, Di Wu
doaj  

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Topological dyonic black holes of massive gravity with generalized quasitopological electromagnetism

European Physical Journal C: Particles and Fields
In this paper we investigate new dyonic black holes of massive gravity sourced by generalized quasitopological electromagnetism in arbitrary dimensions. We begin by deriving the exact solution to the field equations defining these black holes and look at
Askar Ali, Ali Övgün
doaj   +1 more source

Phase transition and heat engine efficiency of phantom AdS black holes

European Physical Journal C: Particles and Fields, 2018
Phase transition and heat engine efficiency of phantom AdS black holes are investigated with peculiar properties found. In the non-extended phase space, we probe the possibility of T–S criticality in both the canonical ensemble and grand-canonical ...
Jie-Xiong Mo, Shan-Quan Lan
doaj   +1 more source

Black holes in the Superworld

Proceedings of the International Symposium on "Subnuclear Physics: Past, Present and Future" held at the Pontificial Academy of Sciences, Vatican City, 2011
Contribution to the Proceedings of the International Symposium on "Subnuclear Physics: Past, Present and Future" held at the Pontificial Academy of Sciences, Vatican City, 30 October - 2 November 2011.
ANDRIANOPOLI, Laura Maria, D'AURIA, RICCARDO, FERRARA, SERGIO   +2 more
openaire   +3 more sources

A Proof‐of‐Principle Demonstration: Exploring the Effect of Anode Layer Microstructure on the Alkaline Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
Highlighting the importance of anode microstructure for alkaline OER, ultrasonic spray coating is applied at two different temperatures. This proof‐of‐concept approach yielded varied morphologies, structures, wettability and mechanical strength. These variations led to noticeable performance changes in activity after 8 h of measurements, comparing the ...
Adarsh Jain, Christian Marcks, Lars Grebener, Jacob Johny, Ahammed Suhail Odungat, Mohit Chatwani, Mena‐Alexander Kräenbring, Abhishek Shaji, Marc Frederic Tesch, Anna K. Mechler, Vineetha Vinayakumar, Doris Segets   +11 more
wiley   +1 more source

MXene 3D/4D Printing: Ink Formulation and Electrochemical Energy Storage Applications

Advanced Functional Materials, EarlyView.
A comprehensive study of MXene printing technique is presented, focusing on MXene ink formulation, surface chemistry, rheological characteristics, physical storage, and ink stability. Different printing techniques, such as 3D/4D printing, screen printing, inkjet printing, and continuous liquid interface production printing along with their applications
Shaista Nouseen, Martin Pumera
wiley   +1 more source

John Zephaniah Holwell (1711–1798) and the Black Hole of Calcutta [PDF]

, 1944
H. P. Bayon
openalex   +1 more source

The special role of toroidal black holes in holography

Nuclear Physics B, 2023
In the standard holographic “dictionary”, the deep infrared of the strongly coupled boundary field theory is studied by examining the bulk region near to the event horizon of a simple AdS-Reissner-Nordström black hole, near to extremality.
Brett McInnes
doaj