Physics of the Dark Universe最新文献

{"title":"Self-consistent and stable stellar structures in massive gravity","authors":"M.R. Shahzad ,&nbsp;Wajiha Habib ,&nbsp;Asifa Ashraf ,&nbsp;Ali H. Hakami ,&nbsp;Awatef Abidi ,&nbsp;Guzalxon Belalova","doi":"10.1016/j.dark.2025.101896","DOIUrl":"10.1016/j.dark.2025.101896","url":null,"abstract":"<div><div>In this investigation, we introduce a novel generic class of stellar configurations within the framework of de Rham–Gabadadze–Tolley massive gravity (dRGT), which aligns well with empirical observational data. The geometric structure analyzed is characterized by static and spherically symmetric properties and incorporates an anisotropic matter distribution. The governing Einstein field equations are adeptly resolved by employing the Durgapal–Lake (DL) metric potentials. The unknown constants are integral to these potentials, with their respective values determined through a comparative analysis with the Schwarzschild line-element, serving as an external geometry at the stellar surface corresponding to the interior space–time. Our comprehensive evaluation of this proposed model affirms its viability as a physically consistent compact object within the dRGT paradigm. This analysis encompasses a diverse array of compact star candidates, representing a broader category of compact stellar structures. The findings reveal that the model exhibits stable characteristics devoid of singularities while effectively encapsulating a wide spectrum of observed compact objects in astrophysical scenarios. This rigorous assessment ensures adherence to essential physical criteria, thereby enhancing its relevance in elucidating the dynamics of compact stars.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101896"},"PeriodicalIF":5.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"One extension to explain them all, one scale-invariant spectrum to test them all, and in one model bind them","authors":"Matteo Forconi ,&nbsp;Eleonora Di Valentino","doi":"10.1016/j.dark.2025.101904","DOIUrl":"10.1016/j.dark.2025.101904","url":null,"abstract":"<div><div>The increasing precision of Cosmic Microwave Background (CMB) observations has unveiled significant tensions between different datasets, notably between Planck and the Atacama Cosmology Telescope (ACT), as well as with late-Universe measurements of the Hubble constant. In this work, we explore a variety of beyond-<span><math><mi>Λ</mi></math></span>CDM extensions to assess their ability to reconcile these discrepancies. Specifically, we consider modifications to the primordial power spectrum, geometry, dark energy, the effective number of relativistic species, and the primordial helium fraction, as well as an Early Dark Energy (EDE) component. We evaluate each model using multiple statistical tools, including the Akaike Information Criterion (AIC), Bayesian model comparison, suspiciousness, and the goodness-of-fit estimator. Our results confirm that no single extension fully resolves all existing tensions. While a nonzero curvature is favored by Planck-only data, it does not alleviate the Planck–ACT discrepancy. The EDE scenario, particularly with a fixed Harrison–Zeldovich spectrum, provides the best resolution to the Planck–ACT inconsistency, while <span><math><mi>w</mi></math></span>CDM is more effective at reducing the Hubble tension when SH0ES data are included. However, the statistical preference for these extensions remains moderate, and imposing <span><math><mrow><msub><mrow><mi>n</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>=</mo><mn>1</mn></mrow></math></span> often worsens model performance. Our findings highlight the limitations of modifications to <span><math><mi>Λ</mi></math></span>CDM and suggest that either more complex new physics or, more likely, improved systematic understanding in the CMB sector may be required to fully address the observed tensions. While CMB experiments are often considered the gold standard of precision cosmology, our results reinforce that these measurements are not immune to systematic uncertainties, which may be underestimated in current analyses.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101904"},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Motions of test particles in gravitational field, perturbations and greybody factor of Bardeen-like AdS black hole with phantom global monopoles","authors":"Faizuddin Ahmed ,&nbsp;Ahmad Al-Badawi ,&nbsp;İzzet Sakallı ,&nbsp;Sara Kanzi","doi":"10.1016/j.dark.2025.101907","DOIUrl":"10.1016/j.dark.2025.101907","url":null,"abstract":"<div><div>We investigate the dynamics of test particles, perturbations, and greybody factors within the framework of a Bardeen-like AdS black hole (BH) with a phantom global monopole. This study explores the interactions between nonlinear electrodynamics, the energy scale of symmetry breaking, and space–time topology. We analyze the geodesic motion of null and time-like particles, deriving effective potentials that describe their trajectories. Utilizing the Regge–Wheeler potential, we calculate the quasinormal modes (QNMs) for scalar, vector, and tensor perturbations, applying the sixth-order WKB approximation. Our findings highlight how the Bardeen-like parameter (<span><math><mi>b</mi></math></span>) and the energy scale of symmetry breaking, characterized by the parameter (<span><math><mi>η</mi></math></span>), influence the QNM spectra, with potential implications for gravitational wave observations. We also examine greybody factors, focusing on the transmission and reflection coefficients for scalar and axial fields, and employ semi-analytic techniques to derive precise bounds. Furthermore, we assess the thermodynamic stability of the BH, emphasizing the role of these parameters in phase transitions and stability criteria.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101907"},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Gray-body factors: Method matters","authors":"Alexandre Arbey ,&nbsp;Marco Calzà ,&nbsp;Yuber F. Perez-Gonzalez","doi":"10.1016/j.dark.2025.101903","DOIUrl":"10.1016/j.dark.2025.101903","url":null,"abstract":"<div><div>The calculation of gray-body factors is essential for understanding Hawking radiation and black hole thermodynamics. While the formalism developed by Chandrasekhar is effective for static black holes, it faces significant challenges in Kerr spacetimes, particularly in the superradiant regime, where a specific choice of coordinates introduces numerical inaccuracies. To address these limitations, an alternative method based on re-scaling radial coordinates and employing Frobenius-like expansions has been investigated. We compare the gray-body factors obtained for a near-maximally rotating black hole using both methods and find that the Chandrasekhar formalism systematically overestimates the values in the superradiant regime compared to well-established analytical results. Specifically, for a spin parameter of <span><math><mrow><msub><mrow><mi>a</mi></mrow><mrow><mo>∗</mo></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>999</mn></mrow></math></span>, the Chandrasekhar method yields values approximately twice as large as the correct result. Since this approach has been implemented in <span>BlackHawk</span>, we assess the impact of these discrepancies on constraints derived from gamma-ray observations of highly spinning primordial black holes.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101903"},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Status of early dark energy after DESI: The role of Ωm and rsH0","authors":"Jun-Qian Jiang","doi":"10.1016/j.dark.2025.101902","DOIUrl":"10.1016/j.dark.2025.101902","url":null,"abstract":"<div><div>The EDE model is one of the promising solutions to the long-standing Hubble tension. This paper investigates the status of several EDE models in light of recent BAO observations from the Dark Energy Spectroscopic Instrument (DESI) and their implications for resolving the Hubble tension. The DESI Y1 BAO results deviate from the CMB and Type Ia supernova (SNeIa) observations in their constraints on the matter density <span><math><msub><mrow><mi>Ω</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> and the product of the sound horizon and the Hubble constant <span><math><mrow><msub><mrow><mi>r</mi></mrow><mrow><mi>s</mi></mrow></msub><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span>. Meanwhile, these EDE models happen to tend towards this deviation. Therefore, in this work, it is found that DESI Y1 BAO results strengthen the preference for EDE models and help to obtain a higher <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>. Even considering the Pantheon+ observations for SNeIa, which have an opposite tendency, DESI still dominates the preference for EDE. This was unforeseen in past SDSS BAO measurements and therefore emphasizes the role of BAO and SNeIa measurements in Hubble tension.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101902"},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Weak gravitational lensing in Ricci-coupled Kalb–Ramond bumblebee gravity: Global monopole and axion-plasmon medium effects","authors":"Ali Övgün","doi":"10.1016/j.dark.2025.101905","DOIUrl":"10.1016/j.dark.2025.101905","url":null,"abstract":"<div><div>In this paper, we study the influence of the axion-plasmon medium, as proposed in [10.1103/PhysRevLett.120.181803] Terças et al. (2018), on the optical properties of black holes in a Lorentz-violating spacetime containing a global monopole. Our primary aim is to provide a test for detecting the effects of a fixed axion-plasmon background within the framework of Ricci-coupled Kalb–Ramond bumblebee gravity. By extending the conventional Einstein–bumblebee model through a nonminimal coupling between the Kalb–Ramond field and the Ricci tensor, we demonstrate that the combined presence of a global monopole and Lorentz-violating effects induces significant modifications to the classical Schwarzschild lensing signature. Employing the Gauss–Bonnet theorem within an optical geometry approach, we derive an analytical expression for the deflection angle that incorporates both linear and quadratic contributions from the Lorentz-violating parameter and the monopole charge. Furthermore, we investigate how the axion-plasmon coupling alters light propagation, affecting key observable gravitational deflection angle. Our results indicate that these optical characteristics are notably sensitive to the axion-plasmon parameters, thereby offering promising observational signatures for probing new physics beyond standard general relativity.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101905"},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Equivalence of dark energy models: A theoretical and Bayesian perspective","authors":"David Tamayo ,&nbsp;Erick Urquilla ,&nbsp;Isidro Gómez-Vargas","doi":"10.1016/j.dark.2025.101901","DOIUrl":"10.1016/j.dark.2025.101901","url":null,"abstract":"<div><div>We explore the background equivalence among three dark energy models by constructing explicit mappings between dynamical dark energy (DDE), interacting dark energy (IDE), and running vacuum (RV). In our approach, the dark sector functions that characterize each model — such as the equation of state parameter <span><math><mrow><mover><mrow><mi>w</mi></mrow><mrow><mo>̄</mo></mrow></mover><mrow><mo>(</mo><mi>a</mi><mo>)</mo></mrow></mrow></math></span> for DDE, the interaction term <span><math><mi>Q</mi></math></span> for IDE, and the functional form <span><math><mrow><mi>Λ</mi><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow></mrow></math></span> for RV — are transformed into one another under specific assumptions. Extending previous work by von Marttens et al. (2020), we demonstrate that running vacuum models, characterized by <span><math><mrow><mi>Λ</mi><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow><mo>=</mo><msub><mrow><mi>a</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>+</mo><msub><mrow><mi>a</mi></mrow><mrow><mn>1</mn></mrow></msub><mover><mrow><mi>H</mi></mrow><mrow><mo>̇</mo></mrow></mover><mo>+</mo><msub><mrow><mi>a</mi></mrow><mrow><mn>2</mn></mrow></msub><msup><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, can be reinterpreted as an interacting dark energy model with <span><math><mrow><mi>Q</mi><mo>=</mo><mn>3</mn><mi>H</mi><mi>γ</mi><msub><mrow><mover><mrow><mi>ρ</mi></mrow><mrow><mo>ˆ</mo></mrow></mover></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span>, which in turn is equivalent to a dynamic dark energy model with an appropriately defined <span><math><mrow><mover><mrow><mi>w</mi></mrow><mrow><mo>̄</mo></mrow></mover><mrow><mo>(</mo><mi>a</mi><mo>)</mo></mrow></mrow></math></span>. Using Bayesian analysis with Type Ia supernovae, Baryon Acoustic Oscillations, and Cosmic Chronometers, our observational constraints confirm that these theoretical equivalences hold at the background level. This study underscores the importance of seeking convergence in dark energy models, facilitating a better understanding of the dark sector.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101901"},"PeriodicalIF":5.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"The correspondence of generalised entropic cosmology theory with F(T) and F(Q) modified gravity and gravitational waves","authors":"Shin’ichi Nojiri ,&nbsp;Sergei D. Odintsov","doi":"10.1016/j.dark.2025.101899","DOIUrl":"10.1016/j.dark.2025.101899","url":null,"abstract":"<div><div>We investigate the correspondence between modified gravity theories and general entropic cosmology theory. Such a theory is proposed by an analogy with Jacobson’s work, where the Einstein equation was derived from the Bekenstein–Hawking entropy. We compare FLRW equations obtained in entropic gravity with those in modified gravity theories. It is found the correspondence of <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravities and general entropic gravity. We regard the <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity theories as effective local theories corresponding to the entropic gravity theories and we investigate the gravitational waves. The obtained equation of the gravitational wave is identical to that in Einstein’s gravity except that the gravitational coupling is modified by the functional form of the functions <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span>. It is interesting that in the case of the Tsallis entropic cosmology, the gravitational coupling becomes small or large, which may suppress or enhance the emission of the gravitational wave.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101899"},"PeriodicalIF":5.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Hydrostatic equilibrium configurations of neutron stars in the f(R,L,T) gravity theory","authors":"J.A.S. Fortunato ,&nbsp;P.H.R.S. Moraes ,&nbsp;E. Brito ,&nbsp;J.G. de Lima Júnior ,&nbsp;T.S. Guerini","doi":"10.1016/j.dark.2025.101893","DOIUrl":"10.1016/j.dark.2025.101893","url":null,"abstract":"<div><div>In the present work, we obtain the hydrostatic equilibrium configurations of neutron stars in the recently proposed <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>L,T</mi><mo>)</mo></mrow></mrow></math></span> theory of gravity, for which <span><math><mi>R</mi></math></span> is the Ricci scalar, <span><math><mi>L</mi></math></span> is the matter lagrangian density, <span><math><mi>T</mi></math></span> is the trace of the energy–momentum tensor and <span><math><mi>f</mi></math></span> is a function of the argument. This theory emerges in the present literature as a generalized geometry-matter coupling theory of gravity. We derive the Tolman–Oppenheimer–Volkoff-like equation for a particular functional form of the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>L</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> function. Our solutions are obtained from realistic equations of state describing matter inside neutron stars. We obtain stable solutions for neutron stars and we show that for some values of the free parameter of the theory it is possible to be in agreement with both NICER and LIGO/Virgo observational data. We also calculate the surface gravitational redshift for the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>L</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity neutron stars.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101893"},"PeriodicalIF":5.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Cosmological eras with the neutrino non-relativistic transition in f(R,T) gravity","authors":"Jonas Pinheiro da Silva ,&nbsp;Hermano Velten","doi":"10.1016/j.dark.2025.101897","DOIUrl":"10.1016/j.dark.2025.101897","url":null,"abstract":"<div><div>Theories based on the Ricci and the trace of the energy–momentum tensor, or the short name Ricci-trace-based (RTB) theories, represent a gravitational approach based on the Ricci scalar <span><math><mi>R</mi></math></span>, and the trace of the energy–momentum tensor <span><math><mrow><msup><mrow><mi>g</mi></mrow><mrow><mi>μ</mi><mi>ν</mi></mrow></msup><msub><mrow><mi>T</mi></mrow><mrow><mi>μ</mi><mi>ν</mi></mrow></msub><mo>=</mo><mi>T</mi></mrow></math></span>. This theory fits into gravitational models of the type <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow><mo>=</mo><mi>R</mi><mo>+</mo><mi>f</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span>, where <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> is an arbitrary function of <span><math><mi>T</mi></math></span>. In this study, we explore a cosmological scenario within the context of RTB models, investigating in detail the cosmological consequences of the coupling between matter and geometry. In order to address this issue, we propose a toy model in which the non-relativistic cosmological neutrino transition plays a role in the cosmic evolution since the effective total energy–momentum tensor trace is affected in this process. We raise questions about the coupling of neutrinos with geometry during this transition, providing a detailed analysis of how RTB gravity deals with this phenomenon and the impact of neutrinos on cosmological dynamics. In summary, we show that the coupling of cosmological neutrinos with <span><math><mi>T</mi></math></span> dependent cosmologies is severely challenged.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"48 ","pages":"Article 101897"},"PeriodicalIF":5.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}