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Journal articles on the topic 'Black hole physics'

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1

Zakharov, Aleksandr F. "Black hole physics." Physics-Uspekhi 42, no. 9 (1999): 947–51. http://dx.doi.org/10.1070/pu1999v042n09abeh000651.

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2

Zakharov, A. F. "Black hole physics." Uspekhi Fizicheskih Nauk 169, no. 9 (1999): 1041. http://dx.doi.org/10.3367/ufnr.0169.199909h.1041.

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3

Carballo-Rubio, Raúl, Francesco Di Filippo, Stefano Liberati, et al. "Towards a non-singular paradigm of black hole physics." Journal of Cosmology and Astroparticle Physics 2025, no. 05 (2025): 003. https://doi.org/10.1088/1475-7516/2025/05/003.

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Abstract The study of regular black holes and black hole mimickers as alternatives to standard black holes has recently gained significant attention, driven both by the need to extend general relativity to describe black hole interiors, and by recent advances in observational technologies. Despite considerable progress in this field, significant challenges remain in identifying and characterizing physically well-motivated classes of regular black holes and black hole mimickers. This paper provides an overview of these challenges, and outlines some of the promising research directions — as disc
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4

Voss, D. "PHYSICS: Black Hole Encryption." Science 311, no. 5767 (2006): 1525a. http://dx.doi.org/10.1126/science.311.5767.1525a.

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5

VISSER, MATT. "HAWKING RADIATION: A PARTICLE PHYSICS PERSPECTIVE." Modern Physics Letters A 08, no. 18 (1993): 1661–70. http://dx.doi.org/10.1142/s0217732393001409.

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It has recently become fashionable to regard black holes as elementary particles. By taking this suggestion reasonably seriously it is possible to cobble together an elementary particle physics based on estimate for the decay rate (black hole) i → (black hole) f+ (massless quantum) . This estimate of the spontaneous emission rate contains two free parameters which may be fixed by demanding that the high energy end of the spectrum of emitted quanta match a black body spectrum at the Hawking temperature. The calculation, though technically trivial, has important conceptual implications: (1) The
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6

Abramovsky. "Abramovsky—Gribov—Kancheli Theorem in the Physics of Black Holes." Physics 1, no. 2 (2019): 253–70. http://dx.doi.org/10.3390/physics1020020.

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The proof of the Abramovsky—Gribov—Kancheli (AGK) theorem for black hole physics is given. Based on the AGK relations, a formula for the luminosity of a black hole as a function of the mass of the black hole is derived. The correspondence to experimental data is considered. It is shown that the black holes of the galaxies NGC3842 and NGC4889 do not differ from those of the other galaxies.
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7

Sims, Christopher. "Analogous Black Holes in Type-III Dirac Semimetal Ni3In2X2 (X = S, Se)." Crystals 13, no. 5 (2023): 847. http://dx.doi.org/10.3390/cryst13050847.

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Black holes are objects that have a large mass and curve space time, characterized by their event horizon and singularity. Recently, an interesting concept of analogous black holes has emerged in the field of condensed matter physics. In this work, the possibility of realizing analogous black holes in topological material is Ni3In2X2 (X = S, Se) discussed. This work shows that the type-III Dirac cones of the material can lead to the emergence of an event horizon and the formation of a black hole-like region near the Dirac point. In addition, the possible experimental signatures of such a syste
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8

Nasution, Budiman, Winsyahputra Ritonga, Ruben Cornelius Siagian, et al. "Physics Visualization of Schwarzschild Black Hole through Graphic Representation of the Regge-Wheeler Equation using R-Studio Approach." Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam 20, no. 1 (2023): 8–24. http://dx.doi.org/10.31851/sainmatika.v20i1.11845.

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This study aims to visualize the vibrations of black holes using the Regge-Wheeler equation in Cartesian coordinates. Black holes are astrophysical objects with extremely strong gravity, and understanding the vibrations around them provides insights into the nature and structure of black holes. The Regge-Wheeler equation is used to model these vibrations. In this study, the goal is to generate visual images that visualize the vibrations of black holes, including their frequencies, amplitudes, and possible vibration modes. Complex mathematical and computational methods were employed to create t
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9

Altas, E., and B. Tekin. "Basics of Apparent horizons in black hole physics." Journal of Physics: Conference Series 2191, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1742-6596/2191/1/012002.

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Abstract 1Event Horizon, a null hypersurface defining the boundary of the black hole region of a spacetime, is not particularly useful for evolving black holes since it is non-local in time. Instead, one uses the more tangible concept of Apparent Horizon for dynamical black holes out there in the sky that do all sorts of things: evolve, merge and feed on the environment. Event Horizon, being a gauge-independent, global property of the total spacetime is easy to define and locate in the stationary case; on the other hand, Apparent Horizon depends on the embedding of the surface in spacetime and
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10

Aste, Andreas, and Dirk Trautmann. "Radial fall of a test particle onto an evaporating black hole." Canadian Journal of Physics 83, no. 10 (2005): 1001–6. http://dx.doi.org/10.1139/p05-058.

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A test particle falling onto a classical black hole crosses the event horizon and ends up in the singularity within finite eigentime. In the "more realistic" case of a "classical" evaporating black hole, an observer falling onto a black hole observes a sudden evaporation of the hole. This illustrates the fact that the discussion of the classical process, commonly found in the literature, may become obsolete when the black hole has a finite lifetime. The situation is basically the same for more complex cases, for example, where a particle collides with two merging black holes. It should be poin
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11

Poudel, Parashu Ram. "The Black Hole." Himalayan Physics 3 (December 26, 2012): 50–55. http://dx.doi.org/10.3126/hj.v3i0.7277.

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Black holes are the cold remnants of former stars. They are so dense that no matter -not even light - is able to escape their powerful gravitational pull. These are interesting objects from a fundamental physics point of view and play an important role in astrophysics. The knowledge of phenomenon of origin of black hole may lead to new understanding of the nature of the real universe. The Himalayan PhysicsVol. 3, No. 32012Page : 50-55
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12

Frolov, Valery P. "Two-dimensional black hole physics." Physical Review D 46, no. 12 (1992): 5383–94. http://dx.doi.org/10.1103/physrevd.46.5383.

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13

Tanaka, Takahiro. "Introduction to Black Hole Physics." Classical and Quantum Gravity 29, no. 14 (2012): 149001. http://dx.doi.org/10.1088/0264-9381/29/14/149001.

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14

Rizwan, Muhammad, and K. Saifullah. "GUP-corrected thermodynamics of accelerating and rotating black holes." International Journal of Modern Physics D 26, no. 05 (2017): 1741018. http://dx.doi.org/10.1142/s0218271817410188.

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When quantum gravity effects, that are based on generalized uncertainty principle with a minimal measurable length, are incorporated into black hole physics the Klein–Gordon and Dirac equations get modified. Using these modified equations we investigate tunneling of scalar particles and fermions from event and acceleration horizons of accelerating and rotating black holes and obtain the modified Hawking temperature with quantum gravity effects. We see that Hawking temperature depends on black hole parameters as well as the quantum numbers of emitted fermions. The quantum corrections slow down
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15

Kumari, Anjali, Om Prakash Dubey, and Sumita Singh. "Entropy in Different Black Hole: A Case Study." International Journal of Students' Research in Technology & Management 12, no. 1 (2024): 1–10. http://dx.doi.org/10.18510/ijsrtm.2024.1211.

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Purpose of Study: The study's objective is to investigate the function of entropy in black holes, with a particular emphasis on the ways in which entropy aids in the comprehension of the properties of various varieties of black holes, such as Schwarzschild, Kerr, and charged black holes (Reissner-Nordström and Kerr-Newman). The objective of the investigation is to examine the unique entropy characteristics that are associated with each form of black hole within the context of black hole thermodynamics. Methodology: The entropy of black holes is examined through a theoretical approach that util
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16

Kubizňák, David, and Robert B. Mann. "Black hole chemistry." Canadian Journal of Physics 93, no. 9 (2015): 999–1002. http://dx.doi.org/10.1139/cjp-2014-0465.

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The mass of a black hole has traditionally been identified with its energy. We describe a new perspective on black hole thermodynamics, one that identifies the mass of a black hole with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids, reentrant phase transitions, and triple points. Both charged and rotating black holes exhibit novel chemical-type phase behaviour, hitherto unseen.
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17

Liebling, Steven L. "Black hole critical phenomena without black holes." Pramana 55, no. 4 (2000): 497–509. http://dx.doi.org/10.1007/s12043-000-0162-6.

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18

Addazi, Andrea, and Salvatore Capozziello. "The fate of Schwarzschild–de Sitter black holes in f(R) gravity." Modern Physics Letters A 31, no. 09 (2016): 1650054. http://dx.doi.org/10.1142/s0217732316500541.

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The semiclassical effects of anti-evaporating black holes can be discussed in the framework of f(R) gravity. In particular, the Bousso–Hawking–Nojiri–Odinstov anti-evaporation instability of degenerate Schwarzschild–de Sitter black holes (the so-called Nariai spacetime) leads to a dynamical increasing of black hole horizon in f(R) gravity. This phenomenon causes the following transition: emitting marginally trapped surfaces (TS) become space-like surfaces before the effective Bekenstein–Hawking emission time. As a consequence, Bousso–Hawking thermal radiation cannot be emitted in an anti-evapo
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19

Hussein, N. A., D. A. Eisa, and T. A. S. Ibrahim. "The Free Energy for Rotating and Charged Black Holes and Banados, Teitelboim and Zanelli Black Holes." Zeitschrift für Naturforschung A 73, no. 11 (2018): 1061–73. http://dx.doi.org/10.1515/zna-2018-0210.

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AbstractThis paper aims to obtain the thermodynamic variables (temperature, thermodynamic volume, angular velocity, electrostatic potential, and heat capacity) corresponding to the Schwarzschild black hole, Reissner-Nordstrom black hole, Kerr black hole and Kerr-Newman-Anti-de Sitter black hole. We also obtained the free energy for black holes by using three different methods. We obtained the equation of state for rotating Banados, Teitelboim and Zanelli black holes. Finally, we used the quantum correction of the partition function to obtain the heat capacity and entropy in the quantum sense.
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20

Hod, Shahar. "Ten shades of black." International Journal of Modern Physics D 24, no. 12 (2015): 1544007. http://dx.doi.org/10.1142/s0218271815440071.

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The holographic principle has taught us that, as far as their entropy content is concerned, black holes in (3 + 1)-dimensional curved spacetimes behave as ordinary thermodynamic systems in flat (2 + 1)-dimensional spacetimes. In this paper, we point out that the opposite behavior can also be observed in black-hole physics. To show this we study the quantum Hawking evaporation of near-extremal Reissner–Nordström (RN) black holes. We first point out that the black-hole radiation spectrum departs from the familiar radiation spectrum of genuine (3 + 1)-dimensional perfect black-body emitters. In p
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21

Deng, Pingsong, and Yiqiang Zhang. "Exploring The Formation and Dynamics of Black Holes." Highlights in Science, Engineering and Technology 112 (August 20, 2024): 332–36. http://dx.doi.org/10.54097/2n7y2p36.

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Black holes, created by the collapse of massive stars, are one of the most mysterious phenomena in astrophysics. Understanding their formation and behavior is crucial to understanding the evolution and structure of the universe. However, significant gaps remain in the understanding of their origins and characteristics. This study delves into the complexities of black hole formation, dynamics, and classification, aiming to unravel the mysteries surrounding these cosmic entities. This article uses a combination of the theoretical framework of general relativity and numerical simulation. The stud
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22

GONCHAROV, YU P., and J. V. YAREVSKAYA. "COMPLEX LINE BUNDLES OVER TWO-SPHERE AND BLACK HOLE PHYSICS." Modern Physics Letters A 09, no. 34 (1994): 3175–83. http://dx.doi.org/10.1142/s0217732394002999.

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We discuss a long-standing problem of the global topological non-trivial properties of the four-dimensional space-times underlying black hole physics and observe that the standard space-time topology of the ℝ2×S2 form for black hole physics admits topologically inequivalent configurations of a complex scalar field on black hole by virtue of the availability of non-trivial complex line bundles over S2. Each configuration can be labeled by its Chern number n∈ℤ. For the Schwarzschild black hole we formulate an appropriate wave equation for these configurations in massless case and describe its so
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23

Salman, Bassam Muwafaq. "Quantum Gravitational Acceleration." International Academic Journal of Science and Engineering 11, no. 1 (2024): 48–53. http://dx.doi.org/10.9756/iajse/v11i1/iajse1107.

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In this study, we present the quantum gravitational acceleration. By having something in common All modern theoretical physics equations. Therefore, we can connect the theory of relativity General Einstein with quantum physics, we discuss the physics of black holes from one side and theory Information We show that it is natural to introduce the concept of black hole entropy as a metric Information about the inner parts of a black hole that cannot be accessed by Monitor outside. All equations have physical variables and variables, which express the values of certain, and these values are preser
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24

Das, Sumit R., and Samir D. Mathur. "The Quantum Physics of Black Holes: Results from String Theory." Annual Review of Nuclear and Particle Science 50, no. 1 (2000): 153–206. http://dx.doi.org/10.1146/annurev.nucl.50.1.153.

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▪ Abstract We review recent progress in our understanding of the physics of black holes. In particular, we discuss the ideas from string theory that explain the entropy of black holes from a counting of microstates of the hole, and the related derivation of unitary Hawking radiation from such holes.
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25

Kıroğlu, Fulya, Kyle Kremer, Sylvia Biscoveanu, Elena González Prieto, and Frederic A. Rasio. "Black Hole Accretion and Spin-up through Stellar Collisions in Dense Star Clusters." Astrophysical Journal 979, no. 2 (2025): 237. https://doi.org/10.3847/1538-4357/ada26b.

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Abstract Dynamical interactions in dense star clusters could significantly influence the properties of black holes, leaving imprints on their gravitational-wave signatures. While previous studies have mostly focused on repeated black hole mergers for spin and mass growth, this work examines the impact of physical collisions and close encounters between black holes and (noncompact) stars. Using Monte Carlo N-body models of dense star clusters, we find that a large fraction of black holes retained upon formation undergo collisions with stars. Within our explored cluster models, the proportion of
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26

Volovik, G. E. "Effect of the inner horizon on the black hole thermodynamics: Reissner–Nordström black hole and Kerr black hole." Modern Physics Letters A 36, no. 24 (2021): 2150177. http://dx.doi.org/10.1142/s0217732321501777.

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For the Schwarzschild black hole, the Bekenstein–Hawking entropy is proportional to the area of the event horizon. For the black holes with two horizons, the thermodynamics is not very clear, since the role of the inner horizons is not well established. Here we calculate the entropy of the Reissner–Nordström black hole and of the Kerr black hole, which have two horizons. For the spherically symmetric Reissner–Nordström black hole, we used several different approaches. All of them give the same result for the entropy and for the corresponding temperature of the thermal Hawking radiation. The en
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Boluna, Xavier, Stefano Profumo, Juliette Blé, and Dana Hennings. "Searching for Exploding black holes." Journal of Cosmology and Astroparticle Physics 2024, no. 04 (2024): 024. http://dx.doi.org/10.1088/1475-7516/2024/04/024.

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Abstract The observation of the final stages of the evaporation of a light black hole, which Hawking referred to as “black hole explosion”, would offer critical insights on quantum gravity and high-energy physics phenomena. Here, we explore, review, and revisit the observational features and rates expected for nearby, light, evaporating black holes, and we assess and compare the expected sensitivity of a broad range of observatories. We then focus on the search for candidate black hole explosions in archival data from the Fermi Large Area Telescope and Gamma-ray Burst Monitor, and outline poss
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28

Samuel, Petal. "Black Gravity, or a Hidden History of Empire." differences 35, no. 2 (2024): 132–56. http://dx.doi.org/10.1215/10407391-11259647.

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This essay takes this occasion—the thirtieth anniversary of the publication of Evelynn Hammonds’s germinal essay “Black (W)holes and the Geometry of Black Female Sexuality”—as an opportunity to explore the turn to spacetime and astrophysics in Black feminist writing and scholarship. This understudied tradition has unfolded concurrently alongside the rise of maritime and aquatic metaphors in Black studies. Focusing on the image of the black hole, the essay argues that this metaphor operates as a stimulus for confronting disciplinary objects of anxiety in Black studies, Caribbean studies, physic
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29

Saghafi, Sara, and Kourosh Nozari. "Black hole thermodynamics in Snyder phase space." International Journal of Geometric Methods in Modern Physics 14, no. 11 (2017): 1750164. http://dx.doi.org/10.1142/s021988781750164x.

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By defining a noncommutative symplectic structure, we study thermodynamics of Schwarzschild black hole in a Snyder noncommutative phase space for the first time. Since natural cutoffs are the results of compactness of symplectic manifolds in phase space, the physics of black holes in such a space would be affected mainly by these cutoffs. In this respect, this study provides a basis for more deeper understanding of the black hole thermodynamics in a pure mathematical viewpoint.
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30

Liang, Tairan, and Wei Xu. "Leading order of quantum corrections to black hole entropy sum relations." International Journal of Modern Physics A 34, no. 32 (2019): 1950216. http://dx.doi.org/10.1142/s0217751x19502166.

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It has been found recently that the entropy relations of horizons have the universality of black hole mass-independence for many black holes. These universal entropy relations have some geometric and CFT understanding, which may provide further insight into the quantum physics of black holes. In this paper, we present the leading order of black hole entropy sum relations under the quantum corrections. It is found that the modified entropy sum becomes mass-dependent for some black holes in asymptotical (A)dS and flat space–times. We also give an example that the modified entropy sum of regular
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31

WHITING, BERNARD F. "NEW RESULTS IN BLACK HOLE PHYSICS." International Journal of Modern Physics D 03, no. 01 (1994): 317–21. http://dx.doi.org/10.1142/s021827189400054x.

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Brief statements are given on recent results in the following areas: 1) The derivation of a variational (maximum) principle for black hole entropy, and an outline of the physically reasonable properties of the related solution for the density of states in the microcanonical equilibrium ensemble (with Jeffrey Melmed, University of Maine). 2) Analysis of topological contributions to black hole entropy in Lovelock gravity, and the corresponding thermodynamic identity (with Jonathan Z. Simon, University of Maryland). 3) Stability analysis for a shell of matter surrounding a black hole in microcano
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32

Martinec, Emil J., and Samson L. Shatashvili. "Black hole physics and Liouville theory." Nuclear Physics B 368, no. 2 (1992): 338–58. http://dx.doi.org/10.1016/0550-3213(92)90531-f.

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33

Åman, Jan, Ingemar Bengtsson, and Narit Pidokrajt. "Thermodynamic Metrics and Black Hole Physics." Entropy 17, no. 12 (2015): 6503–18. http://dx.doi.org/10.3390/e17096503.

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34

de Alwis, S. P. "Black hole physics from Liouville theory." Physics Letters B 300, no. 4 (1993): 330–35. http://dx.doi.org/10.1016/0370-2693(93)91341-j.

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35

González-Díaz, P. F. "On the Black Hole Internal Physics." Annalen der Physik 498, no. 1-2 (1986): 62–66. http://dx.doi.org/10.1002/andp.19864980108.

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36

Sen, D. K. "Black Hole Fetches Physics Nobel 2020." Indian Science Cruiser 35, no. 2 (2021): 40. http://dx.doi.org/10.24906/isc/2021/v35/i2/209057.

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37

Narzilloev, Bakhtiyor, and Bobomurat Ahmedov. "Observational and Energetic Properties of Astrophysical and Galactic Black Holes." Symmetry 15, no. 2 (2023): 293. http://dx.doi.org/10.3390/sym15020293.

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The work reviews the investigation of electromagnetic, optical, and energetic properties of astrophysical and galactic black holes and surrounding matter. The astrophysical applications of the theoretical models of black hole environment to the description of various observed phenomena, such as cosmic rays of the ultra-high-energy, black hole shadow, gravitational lensing, quasinormal modes, jets showing relativistic effects such as the Doppler beaming, thermal radiation from the accretion discs, quasiperiodic oscillations are discussed. It has been demonstrated that the observational data str
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38

Wu, Qian. "Exploring Black Hole Spin with Relativistic Reflection Spectroscopy: Insights from Stellar-mass and Supermassive Black Hole Populations." Theoretical and Natural Science 100, no. 1 (2025): 69–74. https://doi.org/10.54254/2753-8818/2025.21618.

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This paper investigates black hole spin using the relativistic reflection method, which analyses distorted X-ray spectra to understand accretion dynamics near the event horizon. The RELXILL series of models are very popular in anaylising refletion features. These Models enable a detailed and consistent understanding of the interaction between the accretion disk and relativistic effects. The paper shows the spin distribution of 33 black holes, including 14 stellar-mass black holes and 19 supermassive black holes. [1] High-spin (0.8) systems dominate, highlighting their association with intense
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39

Wen, Wen-Yu. "Thermodynamic metric of deformed Schwarzschild black holes." International Journal of Modern Physics D 26, no. 10 (2017): 1750106. http://dx.doi.org/10.1142/s0218271817501061.

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Thermodynamic metric usually works only for those black holes with more than one conserved charge, thereby excluding the Schwarzschild black hole. In this paper, however, different versions of thermodynamic metric are computed and compared for the Schwarzschild-like black hole by introducing new degrees of freedom. These new degrees of freedom have two purposes. First, the deformed metric may be treated offshell to the ordinary Schwarzschild black hole, and onshell physics corresponds to the submanifold by gauge fixing of this additional degree of freedom. In particular, the thermal Ricci scal
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40

Berezin, Victor. "Black hole thermodynamics without a black hole?" Nuclear Physics B 661, no. 1-2 (2003): 409–22. http://dx.doi.org/10.1016/s0550-3213(03)00251-7.

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41

Murodov, Sardor, Javlon Rayimbaev, Bobomurat Ahmedov, and Eldor Karimbaev. "Quasiperiodic Oscillations and Dynamics of Test Particles around Quasi- and Non-Schwarzschild Black Holes." Universe 9, no. 9 (2023): 391. http://dx.doi.org/10.3390/universe9090391.

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One of the open problems in black hole physics is testing spacetime around black holes through astrophysical observations in the strong field regime. In fact, black holes cannot produce radiation themselves in the electromagnetic spectrum. However, a black hole’s gravity plays an important role in the production of the radiation of the accretion disc around it. One may obtain valuable information from the electromagnetic radiation of accretion discs about the gravitational properties of the spacetime around black holes. In this work, we study particle dynamics in the spacetime of quasi- and no
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42

Chen, Tianyi, Shutong Ge, Jiahui Li, and Xuheng Ma. "The Progress of Black Holes: Principles & Physical Detection Technology." Journal of Physics: Conference Series 2083, no. 2 (2021): 022047. http://dx.doi.org/10.1088/1742-6596/2083/2/022047.

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Abstract Humans have been trying to explain black holes since the 19th century, using theoretical understanding and observations of the universe. Incandescent body thermal radiation has been the focus of extensive theoretical and experimental research for over a century. This paper will discuss the concept of a black hole and use information retrieval to generate a panoramic image of it. The content illustrates black holes from three different perspectives: description of black holes using mathematical methods and data, models, and detection. A black hole is a controversial object, and no one
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43

Tan, Zheqi. "A Study of the Doppler Effect in the Analysis of Black Hole Images." Theoretical and Natural Science 86, no. 1 (2025): 81–87. https://doi.org/10.54254/2753-8818/2025.20351.

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Black holes, one of the most mysterious objects in the universe, have long captured the attention of the scientific community due to their extreme gravity and intricate physics. In theory, a black hole is formed when a massive star or object collapses at the end of its life cycle. When a star exhausts its core energy and is no longer acted upon by external forces, it begins to collapse inward. This process continues until the star reaches a critical density, at which point its gravity becomes so strong that not even light can escape, forming a black hole. Black holes exert a profound influence
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44

Liang, Xiao, Zhuo Zhou, and Jiu Hui Wu. "The experimental study on low frequency sound transmission characteristics of the acoustic black hole." Modern Physics Letters B 33, no. 36 (2019): 1950458. http://dx.doi.org/10.1142/s021798491950458x.

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The acoustic black hole has good sound insulation performance in low frequency range. The transmission and insulation characteristics of acoustic black hole is investigated by experiments. First, we study the transmission and insulation characteristics of the acoustic black hole by numerical simulation. Second, we studied the sound transmission characteristic of multi-level acoustic black hole. Finally, the sound transmission and insulation characteristics of the acoustic black hole are studied by experiments. The influence of the acoustic black hole tip’s diameter on sound insulation coeffici
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45

Buchanan, Mark. "Black Hole Assembly Line." Physics 12 (November 1, 2019). http://dx.doi.org/10.1103/physics.12.120.

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46

Kocherlakota, Prashant, and Luciano Rezzolla. "Distinguishing gravitational and emission physics in black hole imaging: spherical symmetry." Monthly Notices of the Royal Astronomical Society, April 1, 2022. http://dx.doi.org/10.1093/mnras/stac891.

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Abstract Imaging a supermassive black hole and extracting physical information requires good knowledge of both the gravitational and the astrophysical conditions near the black hole. When the geometrical properties of the black hole are well understood, extracting information on the emission properties is possible. Similarly, when the emission properties are well understood, extracting information on the black hole geometry is possible. At present however, uncertainties are present both in the geometry and in the emission, and this inevitably leads to degeneracies in the interpretation of the
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47

Aalsma, Lars, and Gary Shiu. "From rotating to charged black holes and back again." Journal of High Energy Physics 2022, no. 11 (2022). http://dx.doi.org/10.1007/jhep11(2022)161.

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Abstract The mild form of the Weak Gravity Conjecture (WGC) requires higher derivative corrections to extremal charged black holes to increase their charge-to-mass ratio. This allows decay via emission of a smaller extremal black hole. In this paper, we investigate if similar constraints hold for extremal rotating black holes. We do so by considering the leading higher derivative corrections to the four-dimensional Kerr black hole and five-dimensional Myers-Perry black hole. We use a known mapping of these rotating solutions to a four-dimensional non-rotating dyonic Kaluza-Klein black hole and
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48

Barausse, Enrico, and Jutta Kunz. "Black holes beyond General Relativity." General Relativity and Gravitation 57, no. 1 (2025). https://doi.org/10.1007/s10714-024-03333-6.

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Abstract Here, we will discuss some ideas for possible classical/semi-classical modifications of the black hole solutions in General Relativity (GR). These modifications/extensions include black holes in higher dimensions; black holes with additional gravitational fields, or fields beyond the Standard Model of Particle Physics; black holes in alternative classical theories of gravity and in semiclassical gravity; phenomenological models that extend the GR black hole solutions.
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49

Li, Ran, Qun-Tao Ding, and Shu-Zheng Yang. "Modified Hawking temperature and entropy of general stationary black holes by Lorentz invariance violation." Europhysics Letters, May 20, 2022. http://dx.doi.org/10.1209/0295-5075/ac71c2.

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Abstract Correction of Lorentz dispersion relation can be carried out through Lorentz invariance violation(LIV). In the curved space-time with the general stationary black holes, the fermions dynamic equations have been modified more accurately according to the modified Lorenz dispersion relation, and the equations have been solved to obtain a new expression of quantum tunneling rate, black hole Hawking temperature, black hole entropy, and other physical quantities of stationary black holes. These expressions are not only related to factors such as Lorentz invariance violation but also have mo
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50

Biswas, Md Haider Ali. "BLACK HOLES: THE ULTIMATE FATE OF THE COLLAPSING STARS." Khulna University Studies, September 26, 2022, 143–50. http://dx.doi.org/10.53808/kus.2007.8.1.0637-e.

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Black holes are among the most intriguing objects in modern physics (Alwis, 1992). It is one of the most fascinating objects in the universe, and it can be understood on the basis of Einstein’s general theory of relativity. Black hole is nothing but the ultimate destiny of massive stars which undergo a dramatic gravitational collapse (Horowitz and Teukolsky, 1999). In the present study, we investigate the nature of the collapsing stars, the observational evidence for black holes and some recent developments in the black hole physics.
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