Results 91 to 100 of about 102,046 (339)

Gravitational waves from scattering of stellar-mass black holes in galactic nuclei [PDF]

open access: yes, 2008
Stellar-mass black holes (BHs) are expected to segregate and form a steep density cusp around supermassive black holes (SMBHs) in galactic nuclei. We follow the evolution of a multimass system of BHs and stars by numerically integrating the Fokker–Planck
Ryan M. O'Leary, B. Kocsis, A. Loeb
semanticscholar   +1 more source

Engineering Strategies for 2D Layered Tin Halide Perovskite Field‐Effect Transistors

open access: yesAdvanced Functional Materials, EarlyView.
2D halide perovskites are promising candidates for field‐effect transistor (FET) applications due to their high stability and suppressed ion migration in the presence of bulky organic spacers. This review systematically summarizes the optimization engineering strategies of 2D perovskite FETs and future challenges, which provide guidance for developing ...
Shuanglong Wang   +4 more
wiley   +1 more source

Formation of Sub-Chandrasekhar-mass Black Holes and Red Stragglers via Hawking Stars in Ultrafaint Dwarf Galaxies

open access: yesThe Astrophysical Journal
Primordial black holes (PBHs) in the asteroid mass window from 10 ^−16 M _⊙ to 10 ^−10 M _⊙ are currently a popular dark matter candidate. If they exist, some stars would capture them upon formation, and they would slowly accrete the star over gigayears.
Andrew D. Santarelli   +2 more
doaj   +1 more source

Inner horizon instability and the unstable cores of regular black holes

open access: yesJournal of High Energy Physics, 2021
Regular black holes with nonsingular cores have been considered in several approaches to quantum gravity, and as agnostic frameworks to address the singularity problem and Hawking’s information paradox.
Raúl Carballo-Rubio   +4 more
doaj   +1 more source

Radio Detections During Two State Transitions of the Intermediate Mass Black Hole HLX-1 [PDF]

open access: yes, 2012
Relativistic jets are streams of plasma moving at appreciable fractions of the speed of light. They have been observed from stellar mass black holes ($\sim$3$-$20 solar masses, M$_\odot$) as well as supermassive black holes ($\sim$10$^6$$-$10$^9$ M$_ ...
Barret, Didier   +9 more
core   +6 more sources

Determining the spin of two stellar‐mass black holes from disc reflection signatures [PDF]

open access: yes, 2009
We present measurements of the dimensionless spin parameters and inner-disc inclination of two stellar-mass black holes. The spin parameter of SWIFT J1753.5−0127 and GRO J1655−40 is estimated by modelling the strong reflection signatures present in their
R. Reis   +3 more
semanticscholar   +1 more source

Breaking the Capacity Limit for WO3 Anode‐Based Li‐Ion Batteries Using Photo‐Assisted Charging

open access: yesAdvanced Functional Materials, EarlyView.
This image illustrates a photo‐assisted rechargeable lithium‐ion battery. (a) shows the battery structure, where light enhances electron‐hole generation in the anode, boosting ion flow. (b) compares discharging performance, revealing over 60% higher capacity under light compared to dark conditions, showcasing the benefit of light‐assisted energy ...
Rabia Khatoon   +7 more
wiley   +1 more source

Detecting Isolated Stellar-mass Black Holes with the Roman Telescope

open access: yesThe Astronomical Journal, 2023
Isolated stellar-mass black holes (ISMBHs) are potentially discernible through microlensing observations, because they are expected to be long-duration microlensing events.
Sedighe Sajadian, Kailash C. Sahu
doaj   +1 more source

THE CLOSE STELLAR COMPANIONS TO INTERMEDIATE-MASS BLACK HOLES [PDF]

open access: yes, 2015
When embedded in dense cluster cores, intermediate-mass black holes (IMBHs) acquire close stellar or stellar-remnant companions. These companions are not only gravitationally bound, but also tend to hierarchically isolate from other cluster stars through
M. MacLeod, M. Trenti, E. Ramirez-Ruiz
semanticscholar   +1 more source

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