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On the Chen-Teo family of stationary asymptotically locally Minkowskian black holes 平稳渐近局部闵可夫斯基黑洞的Chen-Teo族
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-15 DOI: 10.1007/s10714-026-03545-y
Federico Elizondo Lopez, Hari K. Kunduri, Hakim Temacini
{"title":"On the Chen-Teo family of stationary asymptotically locally Minkowskian black holes","authors":"Federico Elizondo Lopez,&nbsp;Hari K. Kunduri,&nbsp;Hakim Temacini","doi":"10.1007/s10714-026-03545-y","DOIUrl":"10.1007/s10714-026-03545-y","url":null,"abstract":"<div><p>Chen and Teo have constructed a two-parameter family of five dimensional, stationary vacuum black hole solutions whose spatial hypersurfaces are asymptotically locally Euclidean with boundary at infinity <i>L</i>(2, 1). Spatial cross sections of the event horizon have topology <span>(S^3)</span> equipped with inhomogeneous metrics. When the mass is zero, the solution reduces to the trivial product of time with the Eguchi-Hanson gravitational instanton. We show that the spacetime metric can be smoothly extended through an event horizon and that the exterior region is stably causal. We also investigate their geometric and physical properties. In particular, we show that the Smarr relation and first law of black hole mechanics hold and compute the renormalized gravitational action.\u0000\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147702333","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
Rotating wormholes in Einstein-Dirac-Maxwell theory 爱因斯坦-狄拉克-麦克斯韦理论中的旋转虫洞
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-12 DOI: 10.1007/s10714-026-03550-1
Vladimir Dzhunushaliev, Vladimir Folomeev
{"title":"Rotating wormholes in Einstein-Dirac-Maxwell theory","authors":"Vladimir Dzhunushaliev,&nbsp;Vladimir Folomeev","doi":"10.1007/s10714-026-03550-1","DOIUrl":"10.1007/s10714-026-03550-1","url":null,"abstract":"<div><p>We consider rotating wormhole solutions in general relativity supported by a complex non-phantom spinor field (which provides a nontrivial spacetime topology) and electromagnetic fields. The solutions are asymmetric, regular, asymptotically flat and carry nonzero total angular momentum. The physical properties of the resulting configurations are completely determined by the values of three input quantities: the throat parameter, the spinor frequency, and the electromagnetic coupling constant. The wormholes connect two identical Minkowski spacetimes possessing in general different masses and global charges.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147702334","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
Asymptotic solutions for radiating stars 辐射恒星的渐近解
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-12 DOI: 10.1007/s10714-026-03542-1
R. S. Bogadi, G. Leon, M. Govender, K. S. Govinder, S. Maharaj, A. Paliathanasis
{"title":"Asymptotic solutions for radiating stars","authors":"R. S. Bogadi,&nbsp;G. Leon,&nbsp;M. Govender,&nbsp;K. S. Govinder,&nbsp;S. Maharaj,&nbsp;A. Paliathanasis","doi":"10.1007/s10714-026-03542-1","DOIUrl":"10.1007/s10714-026-03542-1","url":null,"abstract":"<div><p>We investigate the evolution of the surface boundary of radiating stars by studying the asymptotic behaviour of exact solutions initiated via the stationary boundary condition. This boundary condition leads to a master equation in the form of a second-order nonlinear differential equation that describes the evolution of the scale factor. We examine this master equation by introducing a set of dimensionless dynamical variables, motivated by similar approaches in cosmological settings. We derive the stationary points of the system in the presence of charge and a cosmological constant. Furthermore, we construct criteria for the initial conditions so that the asymptotic limit approaches a static geometry.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147702335","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
New exact solutions for charged dilaton black holes in Born-Infeld electrodynamics: thermodynamic analysis Born-Infeld电动力学中带电膨胀黑洞的新精确解：热力学分析
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-07 DOI: 10.1007/s10714-026-03532-3
M. Dehghani, R. Baghbani
{"title":"New exact solutions for charged dilaton black holes in Born-Infeld electrodynamics: thermodynamic analysis","authors":"M. Dehghani,&nbsp;R. Baghbani","doi":"10.1007/s10714-026-03532-3","DOIUrl":"10.1007/s10714-026-03532-3","url":null,"abstract":"<div><p>We present new exact analytical solutions for spherically symmetric charged black holes in (<span>(3+1)</span>)-dimensional Einstein-dilaton gravity coupled to nonlinear Born-Infeld electrodynamics. The scalar dilaton field non-minimally coupled to the electromagnetic sector modifies the asymptotic structure of spacetime, resulting in geometries that are neither asymptotically flat nor AdS. We perform a complete analytical derivation of the metric and electromagnetic potential functions, and show that the curvature singularities are covered by event horizons, confirming their black hole nature. Thermodynamic quantities, including mass, entropy, temperature, and electric potential, are derived through geometric and conserved charge methods. We verify that these solutions satisfy the first law of black hole thermodynamics, <span>(dM=TdS+UdQ)</span>. Furthermore, within the canonical ensemble, we analyze the heat capacity and find regions of thermodynamic stability and instability, with possible phase transitions depending on the dilaton and Born-Infeld parameters. These solutions extend known dilaton black hole configurations and provide new insights into the interplay between scalar fields, nonlinear electrodynamics, and black hole thermodynamics.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642091","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
Curvature-dependent electrodynamics in (AdS_3): modified BTZ black holes and thermal properties Curvature-dependent electrodynamics in AdS3documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$AdS_3$$end{document}: modified BTZ black holes and thermal properties
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-07 DOI: 10.1007/s10714-026-03544-z
Allan R. P. Moreira, Abdelmalek Bouzenada, Guo-Hua Sun, Shi-Hai Dong
{"title":"Curvature-dependent electrodynamics in (AdS_3): modified BTZ black holes and thermal properties","authors":"Allan R. P. Moreira,&nbsp;Abdelmalek Bouzenada,&nbsp;Guo-Hua Sun,&nbsp;Shi-Hai Dong","doi":"10.1007/s10714-026-03544-z","DOIUrl":"10.1007/s10714-026-03544-z","url":null,"abstract":"<div><p>In this paper, we investigate the effects of Bopp-Podolsky electrodynamics with curvature coupling on the geometry and thermodynamics of electrically charged BTZ black holes (BHs) in <span>((2+1))</span>-dimensional AdS spacetime. Starting from the second-order expansion of the higher-derivative field equations, we obtain perturbative corrections to the electric field and metric components and analyze their influence on curvature invariants. The modified energy-momentum tensor generates nontrivial geometric deformations that remain finite at the origin and preserve the asymptotic AdS structure. We show that the Bopp-Podolsky parameter introduces qualitative changes to the near-horizon behavior, leading to first- and second-order corrections to the horizon radius and, consequently, to the Hawking temperature. Our results demonstrate that higher-derivative electrodynamics coupled to curvature provides a consistent framework for regularizing electromagnetic fields in <span>((2+1))</span>-dimensional gravity while producing measurable thermodynamic modifications to BTZ BHs.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642093","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
Does a wormhole survive a cosmological bounce? 虫洞能在宇宙反弹中幸存下来吗？
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-05 DOI: 10.1007/s10714-026-03540-3
Daniela Pérez, Gustavo E. Romero, Santiago E. Perez Bergliaffa
{"title":"Does a wormhole survive a cosmological bounce?","authors":"Daniela Pérez,&nbsp;Gustavo E. Romero,&nbsp;Santiago E. Perez Bergliaffa","doi":"10.1007/s10714-026-03540-3","DOIUrl":"10.1007/s10714-026-03540-3","url":null,"abstract":"<div><p>We investigate whether a dynamical wormhole could survive in a universe that undergoes a cosmological bounce. First, the conditions under which a wormhole could persist from a contracting to an expanding phase of the cosmos are presented. Then, the only two known cosmological solutions of Einstein’s equations representing wormholes are analyzed, and it is shown that both dynamical wormholes exist for all cosmic times on both sides of a bouncing universe and at the bounce itself. We also provide a detailed analysis of the causal structure of such spacetimes and the matter content of the wormhole. Finally, some possible astrophysical manifestations of surviving wormholes in a bouncing universe are mentioned. Our results show that, at least for the Kim and Pérez-Raia Neto solutions, there is no topology change in the chosen cosmological model with a bounce.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620166","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
Stability of the closed Einstein universe in symmetric teleparallel f(Q) gravity 对称遥平行f(Q)引力下封闭爱因斯坦宇宙的稳定性
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-04-03 DOI: 10.1007/s10714-026-03537-y
Sana Saleem, M. Z. Bhatti
{"title":"Stability of the closed Einstein universe in symmetric teleparallel f(Q) gravity","authors":"Sana Saleem,&nbsp;M. Z. Bhatti","doi":"10.1007/s10714-026-03537-y","DOIUrl":"10.1007/s10714-026-03537-y","url":null,"abstract":"<div><p>This paper is dedicated to examining the dynamical stability behavior of the Einstein universe using the theoretical context of <span>( f(Q) )</span> gravity. We consider linear, homogeneous, and isotropic perturbations applied to both the scale factor and matter variables. The field equations are formulated using a closed FLRW metric and parameterized via a linear equation of state. To analyze the dynamics of perturbations, we adopt the Starobinsky-type model <span>( f(Q) = Q + alpha Q^2 )</span>, and derive the corresponding static and perturbed field equations. The stability conditions are examined by studying the behavior of perturbations around the static solution, and the resulting stability regions are graphically presented in the relevant parameter space. Our analysis shows that, in contrast to general relativity, stable Einstein static universe solutions can exist under isotropic perturbations for appropriate choices of model parameters in <span>( f(Q) )</span> gravity.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147606721","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
Bianchi cosmologies in a Thurston-based theory of gravity 比安奇宇宙论中的瑟斯顿引力理论
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-03-31 DOI: 10.1007/s10714-026-03519-0
Quentin Vigneron, Hamed Barzegar
{"title":"Bianchi cosmologies in a Thurston-based theory of gravity","authors":"Quentin Vigneron,&nbsp;Hamed Barzegar","doi":"10.1007/s10714-026-03519-0","DOIUrl":"10.1007/s10714-026-03519-0","url":null,"abstract":"<div><p>The strong interplay between Bianchi–Kantowski–Sachs (BKS) spacetimes and Thurston geometries motivates the exploration of the role of topology in our understanding of gravity. As such, we study non-tilted BKS solutions of a theory of gravity that explicitly depends on Thurston geometries. We show that shear-free solutions with perfect fluid, as well as static vacuum solutions, exist for all topologies. Moreover, we prove that, aside from non-rotationally-symmetric Bianchi II models, all BKS metrics isotropize in the presence of a positive cosmological constant, and that recollapse is never possible when the weak energy condition is satisfied. This contrasts with General Relativity (GR), where these two properties fail for Bianchi IX and KS metrics. No additional parameters compared to GR are required for these results. We discuss, in particular, how this framework might allow for simple inflationary models in any topology.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147586697","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
Recent progress on inflation and dark energy from string theory 弦理论中暴胀和暗能量的最新进展
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-03-30 DOI: 10.1007/s10714-026-03538-x
Michele Cicoli
{"title":"Recent progress on inflation and dark energy from string theory","authors":"Michele Cicoli","doi":"10.1007/s10714-026-03538-x","DOIUrl":"10.1007/s10714-026-03538-x","url":null,"abstract":"<div><p>We review recent progress in string model building in both early and late time cosmology. We describe the main theoretical and phenomenological features of an entire class of inflationary models where inflation is driven by a type IIB Kähler modulus which enjoys an effective and approximate shift symmetry. We illustrate how reheating can occur via the perturbative decay of the modulus into visible and hidden sector degrees of freedom, paying particular attention to the associated production of axionic dark radiation. We quickly discuss the status of de Sitter vacua versus quintessence model building in string theory, analysing the level of control of these constructions and the main challenges faced by models of dynamical dark energy. We finally present a working model of axion hilltop quintessence in string theory, stressing the importance of initial conditions.\u0000\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-026-03538-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147586357","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
The Yilmaz-Rosen and Janis-Newman-Winicour metric solutions in the reconstructed scalar-Einstein-Gauss-Bonnet 4d gravitational model 重建标量-爱因斯坦-高斯-博内四维引力模型中的Yilmaz-Rosen和Janis-Newman-Winicour度规解
IF 2.8 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2026-03-27 DOI: 10.1007/s10714-026-03536-z
K. K. Ernazarov
{"title":"The Yilmaz-Rosen and Janis-Newman-Winicour metric solutions in the reconstructed scalar-Einstein-Gauss-Bonnet 4d gravitational model","authors":"K. K. Ernazarov","doi":"10.1007/s10714-026-03536-z","DOIUrl":"10.1007/s10714-026-03536-z","url":null,"abstract":"<div><p>We consider the scalar-Einstein-Gauss-Bonnet (sEGB) 4<i>d</i> gravitational model with a scalar field <span>(varphi left( uright) )</span>, Einstein and Gauss-Bonnet terms. The model action contains a potential term <span>(Uleft( varphi right) )</span>, a Gauss-Bonnet coupling function <span>(fleft( varphi right) )</span> and a parameter <span>(varepsilon = pm 1)</span>, where <span>(varepsilon = 1)</span> corresponds to the canonical scalar field, and <span>(varepsilon = -1)</span> to the phantom field. In this paper we applied the sEGB reconstruction procedure from our previous work [11] to the Yılmaz-Rosen metric, a solution potentially describing a quasi-black hole without an event horizon. Within this framework, we also derived analytical solutions based on scalar-tensor theory. Our results indicate that for this configuration, the potential <i>U</i> vanishes and the scalar field is phantom-like. Furthermore, an analysis of the Einstein equations in the Yılmaz-Rosen metric reveals that all energy conditions are violated. The corresponding energy-momentum tensor suggests the presence of exotic matter with negative pressure, as indicated by the negative value of <span>(T_u^u)</span>. This could originate from a scalar field (such as the Higgs field or another nonlinear field), or from phenomena like dark energy or quintessence. In addition, we considered the application of our reconstruction method in the sEGB model in the Janis-Newman-Winicour (JNW) metric. As noted in this paper, the Yılmaz-Rosen metric is a limiting case of the JNW metric (as <span>(s rightarrow +infty )</span>). Furthermore, we obtained some exact solutions of scalar-tensor theory in the JNW metric.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"58 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147535998","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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