Showing 341 - 360 results of 368 for search '"black holes"', query time: 0.06s Refine Results
  1. 341

    A Possible Solution of the Cosmological Constant Problem Based on GW170817 and Planck Observations with Minimal Length Uncertainty by Abdel Magied Diab, Abdel Nasser Tawfik

    Published 2022-01-01
    “…We propose generalized uncertainty principle (GUP) with an additional term of quadratic momentum motivated by string theory and black hole physics and providing a quantum mechanical framework for the minimal length uncertainty, at the Planck scale. …”
    Get full text
    Article
  2. 342

    Minimum asymptotic energy of a charged spherically symmetric thin-shell wormhole and its stability by S. Habib Mazharimousavi

    Published 2025-02-01
    “…Abstract The static spherically symmetric thin shell of proper mass m and electric charge q around a central star or black hole of mass M is in general unstable. Although with fine-tuned m, q,  and M it can be considered quasi-stable. …”
    Get full text
    Article
  3. 343

    Herrera complexity and shadows of spherically symmetric compact objects by Subhasis Nalui, Subhra Bhattacharya

    Published 2025-02-01
    “…Advanced observational data analysis tools augments the hope for identification of exotic gravitational objects, like the so called “black hole mimickers” and may serve as testing ground for other gravity theories. …”
    Get full text
    Article
  4. 344

    Improved Clonal Selection Algorithm Based on Biological Forgetting Mechanism by Chao Yang, Bing-qiu Chen, Lin Jia, Hai-yang Wen

    Published 2020-01-01
    “…This part of inactive antibody forms a “black hole” of the antibody set, which is difficult to remove and update in a timely manner, thus affecting the speed at which the algorithm approximates the optimal solution. …”
    Get full text
    Article
  5. 345

    Detection of selective forwarding attacks based on adaptive learning automata and communication quality in wireless sensor networks by Hongliang Zhu, Zhihua Zhang, Juan Du, Shoushan Luo, Yang Xin

    Published 2018-11-01
    “…Simulation results indicate the effectiveness of the proposed method in detecting ordinary selective forwarding attacks, black-hole attacks, on-off attacks, and energy exhaustion attacks. …”
    Get full text
    Article
  6. 346

    Ionized Gas Outflows in the Galaxy and Mass Assembly (GAMA) Survey: Signatures of AGN Feedback in Low-mass Galaxies by Sheyda Salehirad, Amy E. Reines, Mallory Molina

    Published 2025-01-01
    “…This indicates that black hole outflows can affect host galaxies in the low-mass range and that AGN feedback in galaxies with M _*  < 10 ^10 M _⊙ should be considered in galaxy evolution models.…”
    Get full text
    Article
  7. 347

    Kilonova/Macronova Emission from Compact Binary Mergers by Masaomi Tanaka

    Published 2016-01-01
    “…We review current understanding of kilonova/macronova emission from compact binary mergers (mergers of two neutron stars or a neutron star and a black hole). Kilonova/macronova is emission powered by radioactive decays of r-process nuclei and it is one of the most promising electromagnetic counterparts of gravitational wave sources. …”
    Get full text
    Article
  8. 348

    Detection and Prevention of Man-in-the-Middle Spoofing Attacks in MANETs Using Predictive Techniques in Artificial Neural Networks (ANN) by Robert A. Sowah, Kwadwo B. Ofori-Amanfo, Godfrey A. Mills, Koudjo M. Koumadi

    Published 2019-01-01
    “…These networks are more susceptible to attacks such as black hole and man-in-the-middle (MITM) than their corresponding wired networks. …”
    Get full text
    Article
  9. 349

    Shaping the 2010 Strategic Defence &amp; Security Review : An Exercise in Squaring Conflicting Priorities by Jean-Claude Sergeant

    Published 2014-12-01
    “…But the main causes of this black hole are to be found in a combination of factors : the competition between the three Services for securing state-of-the-art equipment, often as a result of the required level of interoperability with American Forces ; the fact that this overspecification trend has been tacitly encouraged by the incapacity or unwillingness of the MoD to scrap an arms project once the main financial gate has been cleared irrespective of its wayward development ; the “cosy relationship” between major defence industrialists, MoD procurement officials and MPs, which often affects the way major contracts are awarded. …”
    Get full text
    Article
  10. 350

    Neural ODEs for holographic transport models without translation symmetry by Zhuo-Fan Gu, Yu-Kun Yan, Shao-Feng Wu

    Published 2025-01-01
    “…This allows us to determine $$\eta _{\textrm{re}}(\omega )$$ η re ( ω ) of a strongly coupled field theory by the black hole metric and the graviton mass. The latter serves as the bulk dual to the translation symmetry breaking on the boundary. …”
    Get full text
    Article
  11. 351

    Systematic Search for Long-term Trends in Fermi-LAT Jetted Active Galactic Nuclei by P. Peñil, A. Domínguez, S. Buson, M. Ajello, S. Adhikari, A. Rico

    Published 2025-01-01
    “…These long-term trends may originate from the dynamics of a supermassive black hole binary system, or they could be the result of intrinsic phenomena within the jet itself. …”
    Get full text
    Article
  12. 352

    Interaction of an Outflow with Surrounding Gaseous Clouds as the Origin of Late-time Radio Flares in Tidal Disruption Events by Jialun Zhuang, Rong-Feng Shen, Guobin Mou, Wenbin Lu

    Published 2025-01-01
    “…Close encounter between a star and a supermassive black hole (SMBH) results in the tidal disruption of the star, known as a tidal disruption event (TDE). …”
    Get full text
    Article
  13. 353

    Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared by Megan R. Sturm, Bayli Hayes, Amy E. Reines

    Published 2025-01-01
    “…Effectively finding and identifying active galactic nuclei (AGNs) in dwarf galaxies is an important step in studying black hole formation and evolution. In this work, we examine four mid-infrared (IR)-selected AGN candidates in dwarf galaxies with stellar masses between M _⋆  ~ 10 ^8 and 10 ^9 M _⊙ and find that the galaxies are host to nuclear star clusters (NSCs) that are notably rare in how young and massive they are. …”
    Get full text
    Article
  14. 354

    Information scrambling with higher-form fields by Karunava Sil, Sourav Maji, Stavros Christodoulou, Abhishek Chowdhury

    Published 2025-02-01
    “…We started by computing the late time behavior of OTOCs involving U(1) current operators in five dimensional AdS-Schwarzschild black hole geometry for the 2-form antisymmetric B-fields. …”
    Get full text
    Article
  15. 355

    Phase-transition-induced Collapse of Proto-compact Stars and Its Implication for Supernova Explosions by Xu-Run Huang, Shuai Zha, Ming-chung Chu, Evan P. O’Connor, Lie-Wen Chen

    Published 2025-01-01
    “…A small portion (∼0.04%−1%) of the released binding energy Δ E _B transforms into the diagnostic explosion energy E _exp,diag , which saturates at  ∼6 × 10 ^51 erg near the black hole formation. Note that our E _exp,diag represents an upper limit of the final explosion energies in realistic supernova simulations. …”
    Get full text
    Article
  16. 356

    Semi-Keplerian Magnetized Accretion-Ejection Structures by Seyedeh Zeynab Mousavi, Ali Reza Khesali, Azar Khosravi

    Published 2021-07-01
    “…The structure of a thin geometrically, axisymmetric, a stationary disk around a central black hole threaded by a bipolar magnetic field has been Studied that drives jets by extracting angular momentum. …”
    Get full text
    Article
  17. 357

    GR-Athena++: General-relativistic Magnetohydrodynamics Simulations of Neutron Star Spacetimes by William Cook, Boris Daszuta, Jacob Fields, Peter Hammond, Simone Albanesi, Francesco Zappa, Sebastiano Bernuzzi, David Radice

    Published 2025-01-01
    “…It handles evolutions with a microphysical equation of state and black hole formation in the gravitational collapse of a rapidly rotating star. …”
    Get full text
    Article
  18. 358

    Circular light orbits of a general, static, and spherical symmetrical wormhole with $$Z_2$$ Z 2 symmetry by Naoki Tsukamoto

    Published 2024-12-01
    “…In this study, we categorize the numbers of the circular light orbits of the $$Z_2$$ Z 2 -symmetrical wormhole and their stability from the derivatives of an effective potential at the throat and we investigate the circular light orbits around a Simpson–Visser black-bounce spacetime, a Damour–Solodukhin wormhole spacetime, a Reissner–Nordström black-hole-like wormhole spacetime or a charged Damour–Solodukhin wormhole spacetime as examples. …”
    Get full text
    Article
  19. 359

    Aspects of rotating anisotropic dark energy stars by O. P. Jyothilakshmi, Lakshmi J. Naik, V. Sreekanth

    Published 2024-12-01
    “…The dimensionless quadrupole moment $$QM/J^2$$ Q M / J 2 measuring deviation from a Kerr metric black hole was obtained for anisotropic dark energy stars. …”
    Get full text
    Article
  20. 360

    The Extraordinary Long-lasting Infrared Echo of PS16dtm Reveals an Extremely Energetic Nuclear Outburst by Ning Jiang, Di Luo, Jiazheng Zhu, Roc M. Cutri

    Published 2025-01-01
    “…Such large energetic output compared to normal TDEs could be boosted by the preexisting accretion disk and gas clouds around the black hole. Our model can be validated in the near future by IR time-domain surveys such as the Near-Earth Object Surveyor, given the recent retirement of WISE. …”
    Get full text
    Article