Article
Physics, Multidisciplinary
M. Sharif, Qanitah Ama-Tul-Mughani
Summary: This paper analyzes the critical phenomena and phase transition of Kerr-Sen-anti-de Sitter black hole using Maxwell equal-area law and van der Waal-like equation of state, finding the former technique more proficient for complicated black holes. By constructing phase diagram and studying the impact of thermal fluctuations, it is concluded that black holes below critical pressure exhibit similar phase transition as liquid-gas van der Waal fluid.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Particles & Fields
Zeyuan Gao, Xiangqing Kong, Liu Zhao
Summary: In this paper, the thermodynamics of Kerr-AdS black holes in four-dimensional space is revisited using the restricted phase space formalism. The results show that the thermodynamic behavior of Kerr-AdS black holes is very similar to that of RN-AdS black holes, and there exist some special thermodynamic processes and phase transitions.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Nuclear
Bing Tang
Summary: Temporal chaos in a slowly rotating Kerr-AdS black hole occurs only when the perturbation amplitude from a thermal quench surpasses a critical value. However, spatial chaos always emerges under spatial perturbations, regardless of the perturbation amplitude.
Article
Astronomy & Astrophysics
Joy Das Bairagya, Kunal Pal, Kuntal Pal, Tapobrata Sarkar
Summary: This study examines the geometry of anti-de-Sitter (AdS) black hole thermodynamics in four dimensions, comparing it explicitly with normal fluid systems in the extended phase space formalism. The research shows how scalar curvature is proportional to thermodynamic volume for the parameter manifolds considered, and discusses how standard features in normal fluid systems impose restrictions on black hole parameters in extended phase space, potentially leading to physically invalid results in the current literature. A conjecture regarding the equality of correlation lengths of co-existing phases near criticality in charged AdS black hole backgrounds is also examined, with reasonable validity found.
Article
Astronomy & Astrophysics
Di Wu, Puxun Wu, Hongwei Yu
Summary: The Kerr-(Newman)-AdS(4) black hole will be shadowless if its rotation parameter exceeds a critical value, possibly due to the appearance of null hypersurface caustics. The presence of null hypersurface caustics is irrelevant to whether an ultraspinning black hole is superentropic or not.
Article
Physics, Particles & Fields
Furkat Sarikulov, Farruh Atamurotov, Ahmadjon Abdujabbarov, Bobomurat Ahmedov
Summary: A detailed study of the horizon structure and shadow of a Kerr-like black hole is conducted. By analyzing the trajectory of light rays and the effective potential of photons around Kerr-like black holes, the formation of the black hole shadow is investigated. The influence of plasma on the shadow of the black hole and the observable radius and oblateness of the shadow are also explored.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Rajibul Shaikh, Kunal Pal, Kuntal Pal, Tapobrata Sarkar
Summary: The study compared shadows cast by two alternatives to the Kerr black hole and found that the maximum value of the parameter r(0) must fall within a specific range in order to be consistent with the observation results of M87*.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
J. Ovalle, E. Contreras, Z. Stuchlik
Summary: The research indicates that the cosmological constant is deformed near a black hole, leading to a reexamination of the black hole solution and the proposal of a new, simpler and more geometrically rich solution. A detailed study of the new black hole solution was carried out, showing the impact of rotation on the curvature, and a conjecture was made regarding its possible implications on alternative theories.
Article
Physics, Multidisciplinary
Yuchen Huang, Jun Tao, Peng Wang, Shuxuan Ying
Summary: Being placed in a cavity is an effective method for black holes to reach thermodynamic equilibrium. In this study, we investigate a Kerr-Newman black hole in a cavity and compare it with two simplified cases. We derive the quasi-local energy and construct the first law of thermodynamics accordingly. These black holes can undergo a van der Waals-like phase transition in a canonical ensemble, similar to that in AdS space. Furthermore, we explore the thermodynamic geometry of these black holes, revealing their sensitivity to microstructures and showing dissimilarities in a cavity.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Particles & Fields
Irina Ya Aref'eva, Anastasia A. Golubtsova, Eric Gourgoulhon
Summary: In this study, the 5d Kerr-AdS black hole is considered as a gravity dual to rotating quark-gluon plasma. The drag force acting on a heavy quark is calculated using holographic prescription by studying the dynamics of the string in the gravity dual. Good agreement is found in the case of one non-zero rotational parameter with the predictions from previous research in the 4d case.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Mathematical
Tanusree Roy, Alok Sardar, Ujjal Debnath
Summary: This paper presents a study on the thermodynamic properties of charged rotating Kerr-Sen-AdS black holes in an extended phase space. It investigates the thermal stability/instability and the dependence of phase transition points on the parameters of the black hole. The authors also analyze the throttling process, explore the Joule-Thomson expansion phenomenon, and calculate the efficiency of a heat engine constructed with the black hole as a working object.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2023)
Article
Astronomy & Astrophysics
Alejandro Aguayo-Ortiz, Olivier Sarbach, Emilio Tejeda
Summary: The choked accretion model transitions a spherically symmetric accretion flow into an inflow-outflow configuration by setting a density contrast between the equatorial and polar regions. This study focuses on accretion of a perfect fluid onto a rotating Kerr black hole, investigating the impact of the black hole's rotation on the flow and demonstrating the robustness of the model.
Article
Astronomy & Astrophysics
Guan-Ru Li, Sen Guo, En-Wei Liang
Summary: In this study, the EHAdS black hole solution was rederived and the high-order quantum electrodynamics correction was considered. It was found that the corrected black hole has only one stable phase transition branch, and its normalized scalar curvature was derived from a microscopic perspective.
Article
Astronomy & Astrophysics
Kostas Glampedakis, George Pappas
Summary: The unprecedented image of the M87* supermassive black hole has sparked controversy over its usefulness as a test of the general relativistic Kerr metric. The paper argues that our ability to probe gravity with a black hole shadow is only partially impaired by the matter degrees of freedom and the number of non-Kerr parameters used in the model. Existing limits from gravitational wave observations imply that supermassive systems like the M87* black hole would suffer a suppression of all non-GR deviation parameters in their metric.
Article
Astronomy & Astrophysics
Kota Ogasawara, Takahisa Igata
Summary: This study investigates the necessary and sufficient conditions for photons emitted from an arbitrary spacetime position of an extremal Kerr black hole to escape to infinity, and provides a visualization method to identify the escapable region.
Article
Astronomy & Astrophysics
Maxim Pospelov, Yu-Dai Tsai
Article
Physics, Multidisciplinary
Gabriel Magil, Ryan Plestid, Maxim Pospelov, Yu-Dai Tsai
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Carlos A. Arguelles, Matheus Hostert, Yu-Dai Tsai
PHYSICAL REVIEW LETTERS
(2019)
Review
Physics, Multidisciplinary
C. A. Arguelles, A. J. Aurisano, B. Batell, J. Berger, M. Bishai, T. Boschi, N. Byrnes, A. Chatterjee, A. Chodos, T. Coan, Y. Cui, A. de Gouvea, P. B. Denton, A. De Roeck, W. Flanagan, D. Forero, R. P. Gandrajula, A. Hatzikoutelis, M. Hostert, B. Jones, B. J. Kayser, K. J. Kelly, D. Kim, J. Kopp, A. Kubik, K. Lang, I Lepetic, P. A. N. Machado, C. A. Moura, F. Olness, J. C. Park, S. Pascoli, S. Prakash, L. Rogers, I Safa, A. Schneider, K. Scholberg, S. Shin, I. M. Shoemaker, G. Sinev, B. Smithers, A. Sousa, Y. Sui, V Takhistov, J. Thomas, J. Todd, Y-D Tsai, Y-T Tsai, J. Yu, C. Zhang
REPORTS ON PROGRESS IN PHYSICS
(2020)
Article
Physics, Particles & Fields
Dan Hooper, Rebecca K. Leane, Yu-Dai Tsai, Shalma Wegsman, Samuel J. Witte
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Multidisciplinary
Yu-Dai Tsai, Patrick DeNiverville, Ming Xiong Liu
Summary: The research team studies hidden-sector particles in past, present, and future experiments, focusing on the minimal vector portal and next-to-minimal models, as well as inelastic dark matter. They demonstrate the power of proton fixed-target experiments as strong probes in the mass range of these models, setting limits and making projections based on various experiments. The studies also motivate the development of LongQuest as a multipurpose machine for exploring new physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Yu-Dai Tsai, Antonella Palmese, Stefano Profumo, Tesla Jeltema
Summary: The study investigates the possibility of the GW170817 gravitational-wave event being a merger between a light, solar-mass black hole and a neutron star, exploring scenarios involving primordial black holes. It is found that dynamical NS-PBH formation could account for the event, and PBH-PBH binaries may have a higher merger rate. The study also discusses the implications for similar existing and future observations, including GW190425 and GW190814.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
Yu-Dai Tsai, Robert McGehee, Hitoshi Murayama
Summary: This paper presents new models based on QCD-like dark sectors to solve small-scale structure problems. By drawing analogies to the meson spectra in standard model QCD, the models introduce resonant self-interacting dark matter and discuss experimental probes for both setups. The paper also comments on the resonant self-interactions already built into SIMP and ELDER mechanisms.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Yu-Dai Tsai, Joshua Eby, Marianna S. Safronova
Summary: Recent advances in quantum sensors, including atomic clocks, have provided new opportunities for searching for ultralight dark matter. The distribution of dark matter in the Solar system is crucial for dark matter direct detection experiments. Space quantum sensors can explore unexplored parameter space of ultralight dark matter, including theoretical targets motivated by naturalness and Higgs mixing. Sensitivity projections for space-based probes of ultralight dark matter have been presented based on current and future atomic, molecular, and nuclear clocks.
Article
Physics, Particles & Fields
Pierce Giffin, Stefania Gori, Yu-Dai Tsai, Douglas Tuckler
Summary: A beam dump experiment with future high energy electron-positron colliders is a promising method to search for dark sector particles. In this study, we focus on heavy neutral leptons (HNLs) and investigate their production and detection at the International Linear Collider (ILC), the Cool Copper Collider (C-3), and the Compact Linear Collider (CLIC). Our findings show that these experiments will explore uncharted regions of the HNL parameter space and warrant further analysis of heavy meson productions in high-energy electron-nucleon collisions.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Ian M. Shoemaker, Yu-Dai Tsai, Jason Wyenberg
Summary: In this paper, researchers found that a magnetic transition dipole moment between tau and sterile neutrinos can account for the XENON1T excess events. Moreover, they set new constraints on the dipole portal based on the Xenon 1T data. The best fit parameter space for sterile neutrinos may have significant effects on big bang nucleosynthesis (BBN).
Article
Astronomy & Astrophysics
Saeid Foroughi-Abari, Felix Kling, Yu-Dai Tsai
Summary: The proposal suggests constructing a scintillator-based FORMOSA experiment in the forward region of the LHC to search for millicharged particles, including those that cannot be detected by ground-based direct-detection experiments. The newly proposed LHC Forward Physics Facility (FPF) is seen as an ideal location to host the full FORMOSA experiment.
Article
Astronomy & Astrophysics
Ryan Plestid, Volodymyr Takhistov, Yu-Dai Tsai, Torsten Bringmann, Alexander Kusenko, Maxim Pospelov
Article
Astronomy & Astrophysics
Kevin J. Kelly, Yu-Dai Tsai
Article
Astronomy & Astrophysics
Joseph Bramante, Tim Linden, Yu-Dai Tsai