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General Relativity and Gravitation最新文献

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Black holes as laboratories: searching for ultralight fields 作为实验室的黑洞：寻找超轻场
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-13 DOI: 10.1007/s10714-025-03376-3
Richard Brito
{"title":"Black holes as laboratories: searching for ultralight fields","authors":"Richard Brito","doi":"10.1007/s10714-025-03376-3","DOIUrl":"10.1007/s10714-025-03376-3","url":null,"abstract":"<div><p>The interaction of black holes with classical fields can lead to many interesting phenomena such as black-hole superradiance and the superradiant instability. The existence of these effects has been shown to have implications for beyond Standard Model particles that could explain dark matter, namely ultralight bosonic fields. In this note I give a historical account of this topic and briefly go through some recent developments. I conclude with some personal reflections on the importance of constraining simple dark matter models, even if such models may ultimately be the incorrect description of nature.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03376-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396693","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 enigmatic gravitational partition function
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-13 DOI: 10.1007/s10714-024-03347-0
Batoul Banihashemi, Ted Jacobson
{"title":"The enigmatic gravitational partition function","authors":"Batoul Banihashemi,&nbsp;Ted Jacobson","doi":"10.1007/s10714-024-03347-0","DOIUrl":"10.1007/s10714-024-03347-0","url":null,"abstract":"<div><p>The saddle point approximation to formal quantum gravitational partition functions has yielded plausible computations of horizon entropy in various settings, but it stands on shaky ground. In this paper we visit some of that shaky ground, address some foundational questions, and describe efforts toward a more solid footing. We focus on the case of de Sitter horizon entropy which, it has been argued, corresponds to the dimension of the Hilbert space of a ball of space surrounded by the cosmological horizon.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401452","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
Non-static axisymmetric structures embedded in an asymptotically (Lambda )CDM universe
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-12 DOI: 10.1007/s10714-025-03359-4
Gonzalo García-Reyes
{"title":"Non-static axisymmetric structures embedded in an asymptotically (Lambda )CDM universe","authors":"Gonzalo García-Reyes","doi":"10.1007/s10714-025-03359-4","DOIUrl":"10.1007/s10714-025-03359-4","url":null,"abstract":"<div><p>We construct non-static adiabatic axisymmetric structures embedded in an asymptotically <span>(Lambda )</span>CDM universe from given solutions of the Poisson’s equation of Newtonian gravity, using a particular form of the metric in isotropic coordinates. The approach is used in building of a razor-thin disk source made of perfect fluid for the McVittie metric, a system composite by a Plummer-type perfect fluid razor-thin disk surrounded by an halo also of perfect fluid, and a model of Miyamoto–Nagai-type anisotropic fluid thick disks, embedded in an asymptotic <span>(Lambda )</span>CDM universe. In the especial case of spherical symmetry, we also present a family of models of expanding anisotropic thick spherical shells. Moreover, the geodesic motion of test particles in stable circular orbits around of the structures, the fulfilment of the energy conditions and principal stresses (pressure) are analyzed.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03359-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393167","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
Thin shell wormhole from rotating hairy black hole in (2+1)-dimensions
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-08 DOI: 10.1007/s10714-025-03371-8
Farook Rahaman, Nilofar Rahman, Mehedi Kalam, Masum Murshid, Amit Das, Sayeedul Islam, Shyam Das
{"title":"Thin shell wormhole from rotating hairy black hole in (2+1)-dimensions","authors":"Farook Rahaman,&nbsp;Nilofar Rahman,&nbsp;Mehedi Kalam,&nbsp;Masum Murshid,&nbsp;Amit Das,&nbsp;Sayeedul Islam,&nbsp;Shyam Das","doi":"10.1007/s10714-025-03371-8","DOIUrl":"10.1007/s10714-025-03371-8","url":null,"abstract":"<div><p>In this article, we theoretically construct a (2 + 1)-dimensional rotating thin shell wormhole using the Darmois-Israel junction formalism. This thin shell wormhole whose validity has been checked by analyzing the energy conditions, specifically, the weak and null energy conditions, is actually constructed by cutting and pasting two rotating hairy black hole spacetimes in (2+1)-dimensions. We further discuss different physical features of the constructed wormhole, viz., the nature of the gravitational field, the equation of state at the throat, and the time evolution of the throat radius. We also analyze the stability of the thin shell wormhole by investigating the equation of motion under small perturbations.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369994","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
Testing the nature of compact objects and the black hole paradigm
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-08 DOI: 10.1007/s10714-025-03361-w
Mariafelicia De Laurentis, Paolo Pani
{"title":"Testing the nature of compact objects and the black hole paradigm","authors":"Mariafelicia De Laurentis,&nbsp;Paolo Pani","doi":"10.1007/s10714-025-03361-w","DOIUrl":"10.1007/s10714-025-03361-w","url":null,"abstract":"<div><p><i>Do compact objects other than black holes and neutron stars exist in the universe? Do all black holes conform with the predictions of Einstein’s General Relativity? Do classical black holes exist at all?</i> Future gravitational-wave observations and black-hole imaging might shed light on these foundational questions and deepen our understanding of the dark cosmos.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03361-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143370030","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
Quintessence scalar field and cosmological constant: dynamics of a multi-component dark energy model
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-07 DOI: 10.1007/s10714-025-03372-7
Prasanta Sahoo, Nandan Roy, Himadri Shekhar Mondal
{"title":"Quintessence scalar field and cosmological constant: dynamics of a multi-component dark energy model","authors":"Prasanta Sahoo,&nbsp;Nandan Roy,&nbsp;Himadri Shekhar Mondal","doi":"10.1007/s10714-025-03372-7","DOIUrl":"10.1007/s10714-025-03372-7","url":null,"abstract":"<div><p>This study explores the dynamics and phase-space behavior of a multi-component dark energy model, where the dark sector consists of a minimally coupled canonical scalar field and the cosmological constant, using a dynamical system analysis setup for various types of potential for which a general parameterization of the scalar field potentials has been considered. Several fixed points with different cosmological behaviors have been identified. A detailed stability analysis has been done and possible late-time attractors have been found. For this multi-component dark energy model, the late-time attractors are either fully dominated by the cosmological constant or represent a scenario where a combination of the scalar field and the cosmological constant dominates the universe. In this type of model, there is a possibility that the scalar field can become dynamical quite early compared to the standard era of dark energy domination. However, our analysis indicates that this early time contribution of the scalar field occurs deep in the matter-dominated era, not before the recombination era.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03372-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258674","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
Thermodynamic phase transition of Anti-de Sitter Reissner–Nordström black holes with exotic Einstein–Maxwell gravities
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-06 DOI: 10.1007/s10714-025-03374-5
Hossein Ghaffarnejad, Elham Ghasemi
{"title":"Thermodynamic phase transition of Anti-de Sitter Reissner–Nordström black holes with exotic Einstein–Maxwell gravities","authors":"Hossein Ghaffarnejad,&nbsp;Elham Ghasemi","doi":"10.1007/s10714-025-03374-5","DOIUrl":"10.1007/s10714-025-03374-5","url":null,"abstract":"<div><p>To consider the inevitable cosmic magnetic effects instead of the unknown dark sector of matter/energy on the inflation phase of the expanding universe some authors have proposed several extended exotic Einstein–Maxwell gravities which are addressed in this work. Some of these exotic models include directional interaction terms between the electromagnetic vector field and the metric tensor field. We use one of them to investigate the physical effects of interaction terms on the thermodynamic behavior of the modified Reissner–Nordstrom (RN) black hole. We use the perturbation series method to find analytic solutions of the field equations because of the non-linearity of the field equations which cause they do not have analytic closed form solutions. We investigate possibility of the Hawking–Page and the small/large black hole phase transition and also, effects of the interaction part of the model on possibility of the coexistence of the several phases of the perturbed AdS RN black hole under consideration.</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184623","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
Generation of effective massive Spin-2 fields through spontaneous symmetry breaking of scalar field
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-05 DOI: 10.1007/s10714-025-03367-4
Susobhan Mandal, S. Shankaranarayanan
{"title":"Generation of effective massive Spin-2 fields through spontaneous symmetry breaking of scalar field","authors":"Susobhan Mandal,&nbsp;S. Shankaranarayanan","doi":"10.1007/s10714-025-03367-4","DOIUrl":"10.1007/s10714-025-03367-4","url":null,"abstract":"<div><p>General relativity and quantum field theory are the cornerstones of our understanding of physical processes, from subatomic to cosmic scales. While both theories work remarkably well in their tested domains, they show minimal overlap. However, our research challenges this separation by revealing that non-perturbative effects bridge these distinct domains. We introduce a novel mechanism wherein, at linear order, spin-2 fields around an arbitrary background acquire <i>effective mass</i> due to the spontaneous symmetry breaking (SSB) of either global or local symmetry of complex scalar field minimally coupled to gravity. The action of the spin-2 field is identical to the extended Fierz-Pauli (FP) action, corresponding to the mass deformation parameter <span>(alpha = 1/2)</span>. We show that this occurs due to the effect of SSB on the variation of the energy-momentum tensor of the matter field, which has a dominant effect during SSB. The extended FP action has a salient feature, compared to the standard FP action: the action has 6 degrees of freedom with no ghosts. For local <i>U</i>(1) SSB, we establish that the effective mass of spin-2 fields is related to the mass of the gauge boson and the electric charge of the complex scalar field. Interestingly, our results indicate that the millicharged dark matter scalar fields, generating dark photons, can produce a mass of spin-2 fields of the same order as the Hubble constant <span>((H_0))</span>. Hence, we argue that the dark sector offers a natural explanation for the acceleration of the current Universe.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108402","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
The confluent Heun functions in black hole perturbation theory: a spacetime interpretation
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-04 DOI: 10.1007/s10714-025-03364-7
Marica Minucci, Rodrigo Panosso Macedo
{"title":"The confluent Heun functions in black hole perturbation theory: a spacetime interpretation","authors":"Marica Minucci,&nbsp;Rodrigo Panosso Macedo","doi":"10.1007/s10714-025-03364-7","DOIUrl":"10.1007/s10714-025-03364-7","url":null,"abstract":"<div><p>This work provides a spacetime interpretation of the confluent Heun functions within black hole perturbation theory (BHPT) and explores their relationship to the hyperboloidal framework. In BHPT, the confluent Heun functions are solutions to the radial Teukolsky equation, but they are traditionally studied without an explicit reference to the underlying spacetime geometry. Here, we show that the distinct behaviour of these functions near their singular points reflects the structure of key geometrical surfaces in black hole spacetimes. By interpreting homotopic transformations of the confluent Heun functions as changes in the spacetime foliation, we connect these solutions to different regions of the black hole’s global structure, such as the past and future event horizons, past and future null infinity, spatial infinity, and even past and future timelike infinity. We also discuss the relationship between the confluent Heun functions and the hyperboloidal formulation of the Teukolsky equation. Although neither confluent Heun form of the radial Teukolsky equation can be interpreted as hyperboloidal slices, this approach offers new insights into wave propagation and scattering from a global black hole spacetime perspective.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03364-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083899","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
Slowly rotating and charged black-holes in entangled relativity
IF 2.1 4区 物理与天体物理
General Relativity and Gravitation Pub Date : 2025-02-04 DOI: 10.1007/s10714-025-03366-5
Maxime Wavasseur, Théo Abrial, Olivier Minazzoli
{"title":"Slowly rotating and charged black-holes in entangled relativity","authors":"Maxime Wavasseur,&nbsp;Théo Abrial,&nbsp;Olivier Minazzoli","doi":"10.1007/s10714-025-03366-5","DOIUrl":"10.1007/s10714-025-03366-5","url":null,"abstract":"<div><p>Entangled Relativity is a non-linear reformulation of Einstein’s General Theory of Relativity (General Relativity) that offers a more parsimonious formulation. This non-linear approach notably requires the simultaneous definition of matter fields, thus aligning more closely with Einstein’s <i>principle of relativity of inertia</i> than General Relativity does. Solutions for spherically charged black holes have already been identified. After exploring further some of the properties of these solutions, we present new solutions for the field equations pertaining to slowly rotating charged black holes.\u0000</p></div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107940","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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