Results 101 to 110 of about 745,401 (375)

Gravitational collapse in loop quantum gravity [PDF]

, 2006
In this paper we study the gravitational collapse in loop quantum gravity. We consider the space-time region inside the Schwarzschild black hole event horizon and we divide this region in two parts, the first one where the matter (dust matter) is ...
A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Bonanno, A. Bonanno, C. Rovelli, C. Rovelli, C. Rovelli, H.A. Kastrup, I. Bengtsson, I. Bengtsson, L. Bombelli, L. Bombelli, L. Modesto, L. Modesto, Leonardo Modesto, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, M. Reuter, R. Kantowski, T. Thiemann, T. Thiemann, Y. Nambu   +32 more
core   +2 more sources

Systematic study of the stochastic gravitational-wave background due to stellar core collapse [PDF]

, 2017
Stellar core collapse events are expected to produce gravitational waves via several mechanisms, most of which are not yet fully understood due to the current limitations in the numerical simulations of these events.
K. Crocker, T. Prestegard, V. Mandic, T. Regimbau, K. Olive, E. Vangioni   +5 more
semanticscholar   +1 more source

Magnetic Field Driven Microrobot Based on Hydrogels

Advanced Robotics Research, EarlyView.
Hydrogel‐based magnetic microrobots synergize remote magnetic control with the biocompatibility of flexible hydrogels, emerging as promising tools for minimally invasive biomedicine. This enables remotely controllable, untethered navigation within complex biological microenvironments.
Juncai Song, Yubing Guo
wiley   +1 more source

Spinning into the Gap: Direct-horizon Collapse as the Origin of GW231123 from End-to-end General-relativistic Magnetohydrodynamic Simulations

The Astrophysical Journal Letters
GW231123, the most massive binary black hole (BH) merger observed to date, involves component BHs with masses inside the pair-instability mass gap and unusually high spins.
Ore Gottlieb, Brian D. Metzger, Danat Issa, Sean E. Li, Mathieu Renzo, Maximiliano Isi   +5 more
doaj   +1 more source

Collapsing dust thin shells in Einstein–Gauss–Bonnet gravity

European Physical Journal C: Particles and Fields, 2022
We investigate gravitational collapse of a spherically symmetric thin shell in the Einstein–Gauss–Bonnet (EGB) gravity. Under the recently proposed 4D limit, we find that the collapsing shell will be bounced back at a small radius, without forming a ...
Yong-Ming Huang, Yu Tian, Xiao-Ning Wu
doaj   +1 more source

Computing gravitational waves from slightly nonspherical stellar collapse to black hole: Odd-parity perturbation

, 2003
Nonspherical stellar collapse to a black hole is one of the most promising gravitational wave sources for gravitational wave detectors. We numerically study gravitational waves from a slightly nonspherical stellar collapse to a black hole in linearized ...
A. Abramovici, C. Bradaschia, C. Gundlach, C.L. Fryer, C.T. Cunningham, C.T. Cunningham, C.T. Cunningham, C.W. Misner, E. Seidel, E. Seidel, E. Seidel, E.W. Leaver, F. Linke, F. Siebel, F.J. Zerilli, G. Lemaître, H. Bondi, H. Dimmelmeier, H. Iguchi, H. Iguchi, H. Iguchi, H. Tagoshi, Hideo Iguchi, J.A. Font, J.C. Miller, J.C. Niemeyer, J.M. Martin-Garcia, J.R. Oppenheimer, K. Jedamzik, K. Kokkotas, K.A. Van Riper, M. Ando, M. Saijo, M. Shibata, M. Shibata, M. Shibata, M. Shibata, M. Shibata, M.J. Rees, M.M. May, Masaru Shibata, P. Papadopoulos, R.C. Tolman, R.F. Stark, R.H. Price, R.S. Hamadé, S. Chandrasekhar, S. Chandrasekhar, S.A. Teukolsky, S.L. Shapiro, T. Harada, T. Harada, T. Harada, T. Nakamura, T. Regge, T.W. Baumgarte, T.W. Baumgarte, T.W. Baumgarte, Tomohiro Harada, U. H Gerlach, U. H Gerlach, V. Moncrief, W.C. Hernandez   +62 more
core   +1 more source

Gravitational Collapse in Constant Potential Bath [PDF]

, 2000
We analyse here the gravitational collapse of directed null radiation in a background with a constant potential such as one produced by a star system like galaxy in which the collapsing object is immersed.
A. Papapetrou, F. Mena, K. Rajagopal, M. Barriola, N. Dadhich, N. Dadhich, N. Dadhich, N. Dadhich, N. Dadhich, N. Dadhich, P. S. Joshi, P. S. Joshi, P. S. Letelier, S. Jhingan, S. Jhingan, S. Jhingan, Y. Kuroda   +16 more
core   +2 more sources

Experimental bounds on collapse models from gravitational wave detectors [PDF]

, 2016
Wave function collapse models postulate a fundamental breakdown of the quantum superposition principle at the macroscale. Therefore, experimental tests of collapse models are also fundamental tests of quantum mechanics.
M. Carlesso, A. Bassi, P. Falferi, A. Vinante   +3 more
semanticscholar   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Magnetic tension and gravitational collapse

, 2006
The gravitational collapse of a magnetised medium is investigated by studying qualitatively the convergence of a timelike family of non-geodesic worldlines in the presence of a magnetic field. Focusing on the field's tension we illustrate how the winding
Christos G Tsagas, Dadhich N, de Felice F, Ellis G F R, Ellis G F R, Friedlander F G, Hawking S W, Krasiński A Bolejko K, Mestel L, Nakamura T, Newman R P A C, Novikov I D, Ori A, Parker E N, Poisson E, Rayan M P, Thorne K S, Tsagas C G, Tsagas C G, Tsagas C G, Wald R M   +20 more
core   +1 more source