Physics of the Dark Universe最新文献

{"title":"Constant-roll inflation and primordial black holes within Barrow entropic framework","authors":"Qihong Huang ,&nbsp;Li-Yang Chen ,&nbsp;He Huang ,&nbsp;Bing Xu ,&nbsp;Kaituo Zhang","doi":"10.1016/j.dark.2025.102072","DOIUrl":"10.1016/j.dark.2025.102072","url":null,"abstract":"<div><div>In this paper, starting from the modified Einstein field equations, we derive the modified scalar spectral index <span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> and the modified tensor-to-scalar ratio <span><math><mi>r</mi></math></span> in Barrow entropy model, calculate their values for the power-law, periodic, and hilltop potential models, constrain the model parameter <span><math><mi>δ</mi></math></span> and the potential parameter using Planck 2018 data, and find that increasing <span><math><mi>δ</mi></math></span> causes a significant decrease in <span><math><mi>r</mi></math></span>. Then, we calculate the primordial curvature perturbation power spectra, primordial black hole (PBH) abundance, and scalar induced gravitational waves (SIGWs) for these models, finding PBH mass of approximately <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>12</mn></mrow></msup><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></mrow></math></span>, PBH abundance nearly 0.98, and the peak frequencies of SIGWs on the order <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mi>Hz</mi></mrow></math></span>, indicating that these models not only generate sufficient PBHs which can contribute one-third of the dark matter content but could also be detected by next-generation missions such as LISA, Taiji, and TianQin. Subsequently, we analyze the evolution of PBHs and find that when the effective equation of state parameter evolves from <span><math><mrow><mn>1</mn><mo>/</mo><mn>3</mn></mrow></math></span> to <span><math><mrow><mo>−</mo><mn>1</mn><mo>/</mo><mn>3</mn></mrow></math></span>, the accretion mass increases to approximately <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msup><msub><mrow><mi>M</mi></mrow><mrow><mi>i</mi></mrow></msub></mrow></math></span>, while the temperature of the PBHs decreases from <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>4</mn></mrow></msup><mi>K</mi></mrow></math></span> to <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msup><mi>K</mi></mrow></math></span>, suggesting that PBHs exist and are detectable today.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102072"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004447","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":"Impact of dynamical dark energy on black hole dynamics in an accelerated expanding universe","authors":"Debasis Sahu ,&nbsp;Bibekananda Nayak ,&nbsp;Lambodar Prasad Singh","doi":"10.1016/j.dark.2025.102117","DOIUrl":"10.1016/j.dark.2025.102117","url":null,"abstract":"<div><div>In this work, an interacting dark energy model is introduced for explaining the dynamical behaviour of our universe, where dark energy is evolved through continuous interaction with matter. Basing on this model, we have first computed the basic parameters like the density of dark energy, which is further utilized to illustrate the universe’s expansion dynamics. Our study suggests that the interacting nature of dark energy is sufficient to explain the observed accelerated expansion of present universe, if it is quintessence type. While the equation of state parameter (<span><math><msub><mrow><mi>γ</mi></mrow><mrow><mi>ϕ</mi></mrow></msub></math></span>) for quintessence ranges between 0 and <span><math><mrow><mo>−</mo><mn>1</mn></mrow></math></span>, our analysis predicts that accelerating nature of universe’s expansion can only occur, if the present value of <span><math><msub><mrow><mi>γ</mi></mrow><mrow><mi>ϕ</mi></mrow></msub></math></span> is less (more negative) than <span><math><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>7866</mn></mrow></math></span>. It is also concluded that the universe’s expansion would undergo a decelerating phase in the early epoch and would shift to accelerated expansion, around <span><math><mrow><mn>0</mn><mo>.</mo><mn>655</mn><msub><mrow><mi>t</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span>, with <span><math><msub><mrow><mi>t</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> representing the current age of our universe. Further, our model indicates that the accelerated expanding phase will continue for ever. Our focus also attributes to the mass evolution of Schwarzschild type black hole. In this context we consider the accumulation of energy-matter and the quantum mechanical Hawking evaporation as the active ingredients for evolution of black holes’ mass and found that accretion efficiency (<span><math><mi>f</mi></math></span>) creates different patterns of mass variations. Again, we have taken a look on the astrophysical constraints that affected the abundance of black holes and found that with increasing accretion efficiency, limits imposed on the black holes’ initial mass fraction would become more tightened.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102117"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266301","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":"Line-of-sight acceleration as a test of the Galactic Yukawa potential","authors":"Felipe A. da Silva Barbosa ,&nbsp;Luca Amendola ,&nbsp;Davi C. Rodrigues ,&nbsp;Roberto Capuzzo-Dolcetta","doi":"10.1016/j.dark.2025.102087","DOIUrl":"10.1016/j.dark.2025.102087","url":null,"abstract":"<div><div>We forecast the impact of direct radial acceleration measurements, based on two redshift measurements of the same target one decade apart, on constraining the Yukawa correction to the Newtonian potential in the Milky Way. The Galaxy’s matter distribution is modeled as the sum of a spherical bulge, a spherical dark matter halo, and two axially symmetric disks. Considering a sample of 165 Milky Way globular clusters, we find that the precision of next-generation spectrographs (<span><math><mo>∼</mo></math></span> 10 cm s⁻¹) is not sufficient to provide competitive constraints compared to rotation curve data using the same baryonic matter distribution. The latter sample only becomes competitive for a precision better than 0.6 cm s⁻¹. On the other hand, we find that adopting a population of <span><math><mrow><mn>1</mn><mo>.</mo><mn>3</mn><mspace></mspace><mo>×</mo><mspace></mspace><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>5</mn></mrow></msup></mrow></math></span> RR Lyrae stars as targets, a precision of <span><math><mo>∼</mo></math></span> 10 cm s⁻¹ can achieve constraints on the Yukawa parameters as strong as with the rotation curves.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102087"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105925","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":"Constraining a generalized ΛCDM model with cosmic chronometers, supernovae, and DESI BAO data","authors":"M. Koussour ,&nbsp;Alnadhief H.A. Alfedeel ,&nbsp;S. Muminov ,&nbsp;J. Rayimbaev","doi":"10.1016/j.dark.2025.102098","DOIUrl":"10.1016/j.dark.2025.102098","url":null,"abstract":"<div><div>We investigate a generalized <span><math><mi>Λ</mi></math></span>CDM cosmological model defined by a modified expansion rate given by <span><math><mrow><mi>H</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow><mo>=</mo><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub><msqrt><mrow><mi>α</mi><msup><mrow><mrow><mo>(</mo><mn>1</mn><mo>+</mo><mi>z</mi><mo>)</mo></mrow></mrow><mrow><mi>n</mi></mrow></msup><mo>+</mo><mrow><mo>(</mo><mn>1</mn><mo>−</mo><mi>α</mi><mo>)</mo></mrow></mrow></msqrt></mrow></math></span>, where the additional parameter <span><math><mi>n</mi></math></span> governs the redshift dependence of the matter contribution. We perform a comprehensive statistical analysis using progressively richer observational datasets, including cosmic chronometers (CC), the PantheonPlus and SH0ES supernova samples (PP+SH0ES), and DESI BAO measurements. The resulting posterior constraints demonstrate that adding late-time probes systematically tightens the allowed parameter ranges and shifts the best-fit <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> toward the local SH0ES estimate, while remaining consistent with CC constraints. We find that the generalized <span><math><mi>Λ</mi></math></span>CDM model provides excellent agreement with both <span><math><mrow><mi>H</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span> and distance modulus data, yielding reduced <span><math><msubsup><mrow><mi>χ</mi></mrow><mrow><mtext>red</mtext></mrow><mrow><mn>2</mn></mrow></msubsup></math></span> values close to unity across all dataset combinations. Information criteria (AIC and BIC) analyses show weak support for the additional parameter with CC alone but strong evidence for its inclusion when PP+SH0ES and DESI data are combined. The evolution of key dynamical quantities, such as the energy density, deceleration parameter <span><math><mrow><mi>q</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span>, and total equation of state (EoS) <span><math><mrow><mi>ω</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span>, further confirms the model’s physical viability, with present-day values of <span><math><mrow><msub><mrow><mi>q</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>≈</mo><mo>−</mo><mn>0</mn><mo>.</mo><mn>563</mn></mrow></math></span> and <span><math><mrow><msub><mrow><mi>ω</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>≈</mo><mo>−</mo><mn>0</mn><mo>.</mo><mn>709</mn></mrow></math></span>, indicating a mildly accelerating universe.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102098"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109392","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":"Symbolic regression analysis of dynamical dark energy with DESI-DR2 and SN data","authors":"Agripino Sousa-Neto ,&nbsp;Carlos Bengaly ,&nbsp;Javier E. Gonzalez ,&nbsp;Jailson Alcaniz","doi":"10.1016/j.dark.2025.102108","DOIUrl":"10.1016/j.dark.2025.102108","url":null,"abstract":"<div><div>Recent measurements of Baryon Acoustic Oscillations (BAO) from the Dark Energy Spectroscopic Survey (DESI DR2), combined with data from the cosmic microwave background (CMB) and Type Ia supernovae (SNe), challenge the <span><math><mi>Λ</mi></math></span>-Cold Dark Matter (<span><math><mi>Λ</mi></math></span>CDM) paradigm. They indicate a potential evolution in the dark energy equation of state (EoS), <span><math><mrow><mi>w</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span>, as suggested by analyses that employ parametric models. In this paper, we use a model-independent approach known as high performance symbolic regression (PySR) to reconstruct <span><math><mrow><mi>w</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span> directly from observational data, allowing us to bypass prior assumptions about the underlying cosmological model. Our findings confirm that the DESI DR2 data alone agree with the <span><math><mi>Λ</mi></math></span>CDM model (<span><math><mrow><mi>w</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow><mo>=</mo><mo>−</mo><mn>1</mn></mrow></math></span>) at the redshift range considered. Additionally, when combining DESI data with existing compilations of SN distance measurements, such as Patheon+ and DESY5, we observe no deviation from the <span><math><mi>Λ</mi></math></span>CDM model within <span><math><mrow><mn>3</mn><mi>σ</mi></mrow></math></span> (C.L.) for the interval of values of present-day matter density parameter <span><math><msub><mrow><mi>Ω</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> and the sound horizon at the drag epoch <span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span> currently constrained by observational data. Therefore, similarly to the DESI DR1 case, these results suggest that it is still premature to claim statistically significant evidence for a dynamical EoS or deviations from the <span><math><mi>Λ</mi></math></span>CDM model based on the current DESI data in combination with supernova measurements.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102108"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220737","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":"Energy extraction and evolution of regular black holes: The case of Bardeen spacetime","authors":"Vitalii Vertogradov ,&nbsp;Angel Rincon","doi":"10.1016/j.dark.2025.102066","DOIUrl":"10.1016/j.dark.2025.102066","url":null,"abstract":"<div><div>This paper examines regular black holes, in particular the Bardeen spacetime where singularities are replaced by non-singular cores. It explores the energy extraction through the charged Penrose process and shows that magnetic charge evaporation can drive a regular black hole towards a singularity. Two evaporation models are proposed, dealing with charge loss and combined charge evaporation with mass accretion, providing insights into the evolution and stability of regular black holes.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102066"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907345","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":"Merger history of clustered primordial black holes","authors":"Viktor Stasenko","doi":"10.1016/j.dark.2025.102138","DOIUrl":"10.1016/j.dark.2025.102138","url":null,"abstract":"<div><div>Primordial black hole (PBH) binaries experience strong gravitational perturbations in the case of their initial clustering, which significantly affects the dynamics of their mergers. In this work, we develop a new formalism to account for these perturbations and track the evolution of the binary orbital parameters distribution. Based on this approach, we calculate the merger rate of PBH binaries and demonstrate that its temporal evolution differs greatly from that of isolated binary systems. Moreover, PBH clustering produces distinctive features in the stochastic gravitational-wave background: the canonical <span><math><mrow><mn>2</mn><mo>/</mo><mn>3</mn></mrow></math></span> spectral slope transforms to <span><math><mrow><msub><mrow><mi>Ω</mi></mrow><mrow><mi>gw</mi></mrow></msub><mo>∝</mo><msup><mrow><mi>ν</mi></mrow><mrow><mo>−</mo><mn>65</mn><mo>/</mo><mn>28</mn></mrow></msup></mrow></math></span> in a certain frequency band. These predictions can be probed in future gravitational wave observations, opening up new opportunities to test the clustering of PBHs and their contribution to dark matter.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102138"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362130","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":"Constraining fermionic dark matter with galactic neutron stars","authors":"Jianyuan Luo ,&nbsp;Dicong Liang ,&nbsp;Lijing Shao","doi":"10.1016/j.dark.2025.102163","DOIUrl":"10.1016/j.dark.2025.102163","url":null,"abstract":"<div><div>Dark matter (DM) remains one of the most significant open questions in modern physics, with its nature and interactions largely unexplored. In this study, we investigate the behavior of massive fermionic DM particles in the context of neutron stars (NSs), extending prior studies which focused on the bosonic DM. By incorporating the motion of NSs in the Galaxy and considering scenarios with and without DM self-annihilation, we demonstrate their impact on the DM capture rate and the accumulation process inside NSs. Observational data from pulsars in the Milky Way are used to place constraints on DM properties, including the mass and the DM-nucleon scattering cross-section, offering a more comprehensive picture in probing DM interactions in astrophysical environments.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102163"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145528683","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":"Holographic thermodynamics of Kerr–Einstein–Maxwell–dilaton–axion–Anti-de-Sitter black hole","authors":"Phongsakorn Sereewat,&nbsp;David Senjaya","doi":"10.1016/j.dark.2025.102132","DOIUrl":"10.1016/j.dark.2025.102132","url":null,"abstract":"<div><div>This work reports a novel investigation of the bulk and CFT thermodynamics of Kerr–EMDA–AdS black hole in 3+1-dimensional AdS spacetime. We comprehensively present the construction of mass functions, the enthalpy analog, of the black hole for both scenarios and derive thermodynamic quantities from there. In the first part of this work, we derive an analytical expression of the bulk temperature, angular momentum per unit mass, electric field, thermodynamic volume, Gibbs and Helmholtz’s free energy functions, internal energy, specific heat capacities, adiabatic compressibility and the thermodynamic black hole’s speed of sound analog. The critical point of the analog Van der Waals phase transition is also analytically investigated. The second part of this work focuses on the CFT thermodynamics counterpart, especially on the critical phenomena. The behavior of the temperature, Helmholtz’s free energy and the heat capacity are analytically and graphically explored in various thermodynamical aspects. The last part of this work is dedicated to investigate the critical phenomena in <span><math><mrow><mover><mrow><mi>F</mi></mrow><mrow><mo>̄</mo></mrow></mover><mo>−</mo><mover><mrow><mi>T</mi></mrow><mrow><mo>̄</mo></mrow></mover></mrow></math></span> and <span><math><mrow><mover><mrow><mi>G</mi></mrow><mrow><mo>̄</mo></mrow></mover><mo>−</mo><mover><mrow><mi>T</mi></mrow><mrow><mo>̄</mo></mrow></mover></mrow></math></span> frameworks via implicit method. Interestingly, we also find that the Kerr–EMDA–AdS black hole exhibits not only first-order phase transitions in the dual CFT, but also a reentrant phase transition, characterized by a multibranched structure of the heat capacity.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102132"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320529","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":"Modeling gravastar structure admitting Kuchowicz spacetime in Rastall gravity theory","authors":"Tayyab Naseer ,&nbsp;M. Sharif ,&nbsp;Areej Tabassum","doi":"10.1016/j.dark.2025.102088","DOIUrl":"10.1016/j.dark.2025.102088","url":null,"abstract":"<div><div>This paper investigates the gravastar model as a potential alternative to black holes, utilizing the Kuchowicz metric in the context of Rastall gravity. The model comprises three distinct regions: an interior with positive energy density and negative pressure, a thin intermediate shell made of ultra-relativistic stiff fluid, and an exterior vacuum. The negative pressure within the interior generates an outward force exerted on the shell, fulfilling the Zel’dovich criterion. This configuration eliminates the central singularity and replaces the event horizon with the shell. We then derive the radial metric functions for both the inner and thin region, yielding a non-singular solution. Furthermore, we examine the physical properties of the shell, such as its energy, proper length, entropy, equation of state parameter, gravitational redshift and adiabatic index, across a range of Rastall parameter values. We conclude that the resulting gravastar model offers a promising solution to the singularity problem of conventional black holes within the context of this non-conservative theory.</div></div>","PeriodicalId":48774,"journal":{"name":"Physics of the Dark Universe","volume":"50 ","pages":"Article 102088"},"PeriodicalIF":6.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109445","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}