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General Relativity and Gravitation最新文献

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Differential curvature invariants and event horizon detection for accelerating Kerr–Newman black holes in (anti-)de Sitter spacetime （反）德西特时空中加速Kerr-Newman黑洞的微分曲率不变量和事件视界探测
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-16 DOI: 10.1007/s10714-024-03348-z
G. V. Kraniotis
{"title":"Differential curvature invariants and event horizon detection for accelerating Kerr–Newman black holes in (anti-)de Sitter spacetime","authors":"G. V. Kraniotis","doi":"10.1007/s10714-024-03348-z","DOIUrl":"10.1007/s10714-024-03348-z","url":null,"abstract":"<div><p>We compute analytically differential curvature invariants for accelerating, rotating and charged black holes with a cosmological constant <span>(varLambda )</span>. Specifically, we compute novel closed-form expressions for the Karlhede and the Abdelqader-Lake invariants, for accelerating Kerr–Newman black holes in (anti-)de Sitter spacetime or subsets thereof with the aim of detecting physically relevant surfaces, like horizons and ergospheres. We explicitly show that some of the computed invariants of the particular class of spacetimes are vanishing at the event, Cauchy and acceleration horizons or ergosurface. Using the Bianchi identities we calculate in the Newman-Penrose tetrad formalism in closed-form the Page-Shoom curvature invariant for the general class of accelerating, rotating and charged Plebański-Demiański black holes with <span>(varLambda not =0)</span> and we prove that is zero at the relevant surfaces. For the invariants that vanish at horizon radii we show that are non-zero everywhere else, or in the case there are additional roots such roots do not affect their capability to detect the physically relevant surfaces. Such curvature invariants are locally measurable quantities and thus could allow the local experimental detection of the event and acceleration horizons or outer ergosurface. The differential invariants which are norms associated with the gradients of the first two Weyl invariants, are explored in detail. Although both locally single out the horizons, their global behaviour is also intriguing. Both reflect the background angular momentum and electric charge as the volume of space allowing a timelike gradient decreases with increasing spin and charge.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kaluza–Klein bubble with massive scalar field 具有大质量标量场的Kaluza-Klein泡
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-15 DOI: 10.1007/s10714-025-03350-z
Darrell Jackson
{"title":"Kaluza–Klein bubble with massive scalar field","authors":"Darrell Jackson","doi":"10.1007/s10714-025-03350-z","DOIUrl":"10.1007/s10714-025-03350-z","url":null,"abstract":"<div><p>A well-known soliton (bubble) solution of five-dimensional Kaluza–Klein General Relativity is modified by imposing mass on the scalar field. By forcing the scalar field to be short-range, the failure of the original bubble solution to satisfy the equivalence principle is remedied, and the bubble acquires gravitational mass. Most importantly, the mass is quantized, even in this classical setting, and has a value <span>(m_P / (4 sqrt{alpha }))</span>, where <span>(m_P)</span> is the Planck mass, and <span>(alpha )</span> is the fine-structure constant. This result applies for any choice of scalar-field mass, as it is an attractor for the field equations.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03350-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142981539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cosmic evolution of Bianchi III model within Born-Infeld f(R) gravity theory Born-Infeld f(R)引力理论下Bianchi III模型的宇宙演化
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-13 DOI: 10.1007/s10714-024-03346-1
Debika Kangsha Banik, Sebika Kangsha Banik, Kalyan Bhuyan
{"title":"Cosmic evolution of Bianchi III model within Born-Infeld f(R) gravity theory","authors":"Debika Kangsha Banik,&nbsp;Sebika Kangsha Banik,&nbsp;Kalyan Bhuyan","doi":"10.1007/s10714-024-03346-1","DOIUrl":"10.1007/s10714-024-03346-1","url":null,"abstract":"<div><p>In this paper, we have put forwarded a detailed investigation on the cosmic evolution of Bianchi type III model within the realm of Born-Infeld <i>f</i>(<i>R</i>) gravity executing the Palatini approach. Using a very eminent tool known as Dynamical System Approach (DSA), we have curtailed the complexity of the non linear field equations and study the dynamics for the form <span>(f(R) =R-beta / R^n)</span>. The main focus of our work is to retrieve the sequence of cosmic evolution and to study the evolution of shear as well as spatial curvature.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Same as ever: looking for (in)variants in the black holes landscape 一如既往：寻找黑洞景观中的（不）变体
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-13 DOI: 10.1007/s10714-025-03351-y
Carlos A. R. Herdeiro
{"title":"Same as ever: looking for (in)variants in the black holes landscape","authors":"Carlos A. R. Herdeiro","doi":"10.1007/s10714-025-03351-y","DOIUrl":"10.1007/s10714-025-03351-y","url":null,"abstract":"<p><i>\"Is it a goose, a duck or a swan?\"</i>—asked the alien. <i>\"I do not know; and to</i> <i><u>know</u></i> <i>we have to look</i> <i><u>closer</u></i>.\"—said the earthling. <i>\"But even from here we can see it has webbed feet... so it is not a chicken.\" </i></p>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03351-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Black holes beyond General Relativity 广义相对论之外的黑洞
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-13 DOI: 10.1007/s10714-024-03333-6
Enrico Barausse, Jutta Kunz
{"title":"Black holes beyond General Relativity","authors":"Enrico Barausse,&nbsp;Jutta Kunz","doi":"10.1007/s10714-024-03333-6","DOIUrl":"10.1007/s10714-024-03333-6","url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-024-03333-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142968158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of the temporal evolution in radiating stars 辐射恒星的时间演化动力学
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-10 DOI: 10.1007/s10714-024-03338-1
S. D. Maharaj, K. S. Govinder
{"title":"Dynamics of the temporal evolution in radiating stars","authors":"S. D. Maharaj,&nbsp;K. S. Govinder","doi":"10.1007/s10714-024-03338-1","DOIUrl":"10.1007/s10714-024-03338-1","url":null,"abstract":"<div><p>We study the dynamics of a charged radiating star in general relativity. The junction conditions at the surface of the star lead to a restriction that connects the radial pressure to the heat flux. The master equation reduces to a nonlinear second order differential equation which determines the temporal evolution. The dynamical behaviour is studied via a phase plane analysis which reveals interesting behaviour. The presence of both the electromagnetic field and the cosmological constant are included in our treatment. They affect the temporal evolution of the gravitating star. We identify the restrictions on the parameters that lead to a stable asymptotic end state of the star.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-024-03338-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermodynamics as a framework for understanding gravitational dynamics and quantum gravity 热力学作为理解引力动力学和量子引力的框架
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-01-08 DOI: 10.1007/s10714-024-03343-4
Ana Alonso-Serrano, Marek Liška
{"title":"Thermodynamics as a framework for understanding gravitational dynamics and quantum gravity","authors":"Ana Alonso-Serrano,&nbsp;Marek Liška","doi":"10.1007/s10714-024-03343-4","DOIUrl":"10.1007/s10714-024-03343-4","url":null,"abstract":"<div><p>We present a review of concepts of thermodynamic of spacetime that allows for an understanding of the gravitational dynamics encoding in it, discussing also the recovery of Weyl transverse gravity instead of General Relativity. We also discuss how these tools can provide some hints in the search of quantum gravity phenomenology, by introducing a formalism to analyze low-energy quantum gravity modifications in a completely general framework based on the thermodynamics of spacetime. For that purpose, we consider quantum gravity effects via a parametrized modification of entropy by an extra logarithmic term in the area, predicted in most of the different approaches to quantum gravity. These results provide a general expression for quantum phenomenological equations of gravitational dynamics.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-024-03343-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linearized stability of Harada thin-shell wormholes 原田薄壳虫孔的线性稳定性
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2024-12-30 DOI: 10.1007/s10714-024-03344-3
Hassan Alshal, Leyang Ding, Adelina Hernandez, Leo A. Illing, Ivar Rydstrom
{"title":"Linearized stability of Harada thin-shell wormholes","authors":"Hassan Alshal,&nbsp;Leyang Ding,&nbsp;Adelina Hernandez,&nbsp;Leo A. Illing,&nbsp;Ivar Rydstrom","doi":"10.1007/s10714-024-03344-3","DOIUrl":"10.1007/s10714-024-03344-3","url":null,"abstract":"<div><p>Using Darmois-Israel-Sen junction conditions, and with help of Visser’s cut-and-paste method, we study the dynamics of thin-shell wormholes that are made of two conformally Killing gravity (a.k.a Harada gravity) black holes. We check the energy conditions for different values of the new parameter that Harada introduced, as alternative for dark energy. We examine the radial acceleration to reveal the attractive and repulsive characteristics of the thin-shell wormhole throat. We consider the dynamics and stability of the wormhole around the static solutions of the linearized radial perturbations at the wormhole throat. Finally, we determine the regions of stability by applying the concavity test on the “speed of sound” as a function in the throat radius and other spacetime parameters, particularly the new Harada parameter.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Euler-heisenberg black holes in einsteinian cubic gravity 爱因斯坦立方引力中的欧拉-海森堡黑洞
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2024-12-28 DOI: 10.1007/s10714-024-03339-0
Gustavo Gutierrez-Cano, Gustavo Niz
{"title":"Euler-heisenberg black holes in einsteinian cubic gravity","authors":"Gustavo Gutierrez-Cano,&nbsp;Gustavo Niz","doi":"10.1007/s10714-024-03339-0","DOIUrl":"10.1007/s10714-024-03339-0","url":null,"abstract":"<div><p>We explore black hole solutions and some of its physical properties in Einstein’s theory in 4D, modified by a cubic gravity term and in the presence of non-linear electrodynamics. In the context of Effective Field Theories (EFT) and under certain assumptions, these curvature and non-linear electromagnetic terms represent the first corrections to the Einstein-Maxwell theory. We obtain static and spherically symmetric generalizations to the asymptotically flat Reissner-Nordström metric using perturbative methods, showing how an asymptotic expansion solution connects with a near horizon solution for a small coupling of the curvature correction term. We perform a thermodynamic stability analysis of the solutions. Finally, we discuss how these EFT corrections change the event horizon properties and also lead to measurable effects on black hole shadows and gravitational lensing around these solutions.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Free fall in modified symmetric teleparallel gravity 修正对称遥平行重力下的自由落体
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2024-12-27 DOI: 10.1007/s10714-024-03342-5
Nivaldo A. Lemos
{"title":"Free fall in modified symmetric teleparallel gravity","authors":"Nivaldo A. Lemos","doi":"10.1007/s10714-024-03342-5","DOIUrl":"10.1007/s10714-024-03342-5","url":null,"abstract":"<div><p>The status of the equivalence principle in modified symmetric teleparallel gravity is examined. In this theory, minimum length geodesics are distinct from autoparallel geodesics, that is, the “shortest” paths are not the “straightest” paths. We show that a standard argument that singles out metric geodesics in general relativity does not apply in modified symmetric teleparallel gravity. This is because the latter theory does not obey the equivalence principle in the sense of Weinberg. We argue, however, that the structure of the theory makes it inevitable that a freely falling test particle follows a shortest path, a geodesic of the metric. The geodesic equation that governs the motion of a freely falling test particle involves the Levi-Civita connection, not some other connection obtained by solving the connection field equations of the theory. This also has bearing on whether, under appropriate conditions, modified symmetric teleparallel gravity is fully equivalent to general relativity.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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