Results 61 to 70 of about 170,936 (294)
Maximum black-hole spin from quasi-circular binary mergers [PDF]
, 2010 Black holes of mass M must have a spin angular momentum S below the Kerr limit chi = S/M^2 < 1, but whether astrophysical black holes can attain this limiting spin depends on their accretion history.
A. Soltan +7 more
core +3 more sources
On the formation and evolution of black hole binaries [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We present the results of a systematic study of the formation and evolution of binaries containing black holes and normal-star companions with a wide range of masses. We first reexamine the standard formation scenario for close black-hole binaries, where the spiral-in of the companion in the envelope of a massive star causes the ejection of the ...
Podsiadlowski, P, Rappaport, S, Han, Z
openaire +3 more sources
The Birth of Binary Direct-collapse Black Holes [PDF]
The Astrophysical Journal Letters, 2020 Abstract Supermassive primordial stars forming during catastrophic baryon collapse in atomically cooling halos at z ∼ 15–20 may be the origin of the first quasars in the universe. However, no simulation to date has followed the evolution of these halos at resolutions that are high enough or for times that are long enough to determine if ...
Muhammad A. Latif +2 more
openaire +4 more sources
Advanced Functional Materials, EarlyView.ABSTRACT In this work, we introduce a trifluoromethoxy (OCF3) group as a pseudo‐halogen terminal group design for non‐fullerene acceptors, which combines strong inductive electron‐withdrawing ability with moderate resonance donation. The as‐synthesized BTP‐OCF3, when benchmarked against its methoxy analogue BTP‐OCH3, demonstrates narrowed bandgap ...
Chunliang Li +16 more
wiley +1 more source
Features of globular cluster’s dynamics with an intermediate-mass black hole
Open Astronomy, 2018 In this paper, we address the question of how a central intermediate-mass black hole (IMBH) in a globular cluster (GC) affects dynamics, core collapse, and formation of the binary population.
Ryabova Marina V. +3 more
doaj +1 more source
Multi‐Functional ZnO–Te Heterojunction Devices Enabling Compact Frequency Quadrupler
Advanced Functional Materials, EarlyView.Wafer‐scale ZnO–Te heterojunction devices featuring tunable double negative differential transconductance (D‐NDT) are demonstrated at ≤ 200°C. Leveraging this unique characteristic, a single‐stage frequency quadrupler is realized, achieving a 64%–75% reduction in device count.
Jae Hyeon Jun +8 more
wiley +1 more source
Which Black Hole Is Spinning? Probing the Origin of Black Hole Spin with Gravitational Waves
The Astrophysical Journal LettersTheoretical studies of angular momentum transport suggest that isolated stellar-mass black holes are born with negligible dimensionless spin magnitudes χ ≲ 0.01.
Christian Adamcewicz +3 more
doaj +1 more source
Corotating binary systems of identical Kerr-Newman black holes
Physics Letters B, 2020 In the present paper binary configurations of identical corotating Kerr-Newman black holes separated by a massless strut are derived and studied. After solving the axis conditions and establishing the absence of magnetic charges in the solution, one gets
I. Cabrera-Munguia +3 more
doaj +1 more source
The Astrophysical Journal, 2023 X-ray spectroscopy of Galactic black hole binaries serves as a powerful tool to gain an overall understanding of the system. Not only can the properties of the accretion disk be studied in detail, the fundamental properties of the black hole such as spin
Sandeep K. Rout +3 more
doaj +1 more source
, 2010 We study an accretion flow during the gravitational-wave driven evolution of binary massive black holes. After the binary orbit decays due to an interaction with a massive circumbinary disk, the binary is decoupled from the circumbinary disk because the ...
Hayasaki, Kimitake
core +1 more source