Journal of High Energy Astrophysics最新文献

{"title":"Gamma-ray bursts calibrated from the observational H(z) data in artificial neural network framework","authors":"Zhen Huang ,&nbsp;Zhiguo Xiong ,&nbsp;Xin Luo ,&nbsp;Guangzhen Wang ,&nbsp;Yu Liu ,&nbsp;Nan Liang","doi":"10.1016/j.jheap.2025.100377","DOIUrl":"10.1016/j.jheap.2025.100377","url":null,"abstract":"<div><div>In this paper, we calibrate the luminosity relation of gamma-ray bursts (GRBs) from an Artificial Neural Network (ANN) framework for reconstructing the Hubble parameter <span><math><mi>H</mi><mo>(</mo><mi>z</mi><mo>)</mo></math></span> from the latest observational Hubble data (OHD) obtained with the cosmic chronometers method in a cosmology-independent way. We consider the physical relationships between the data to introduce the covariance matrix and KL divergence of the data into the loss function and calibrate the Amati relation (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>–<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>iso</mi></mrow></msub></math></span>) by selecting the optimal ANN model with the A219 sample and the J220 sample at low redshift. Combining the Pantheon+ type Ia supernovae (SNe Ia) sample and Baryon acoustic oscillations (BAOs) from Dark Energy Spectroscopy Instrument (DESI) with GRBs at high redshift in the Hubble diagram by Markov Chain Monte Carlo numerical method, we find that the ΛCDM model is preferred over the <em>w</em>CDM and CPL models with joint constraints by the Akaike Information Criterion and Bayesian Information Criterion.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100377"},"PeriodicalIF":10.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759001","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}

{"title":"Matter geometry coupling and Casimir wormhole geometry","authors":"A.S. Agrawal ,&nbsp;Sankarsan Tarai ,&nbsp;B. Mishra ,&nbsp;S.K. Tripathy","doi":"10.1016/j.jheap.2025.100378","DOIUrl":"10.1016/j.jheap.2025.100378","url":null,"abstract":"<div><div>In this study, we investigate traversable wormhole solutions within the setup of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></math></span> gravity, a modified theory of gravity where the gravitational action relies upon the matter Lagrangian <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> and the Ricci scalar <em>R</em>. In General Relativity (GR), stability issue in traversable wormholes necessitates the existence of exotic matter violating the null energy condition (NEC). In contrast, we explore wormhole solutions that align with the criteria for Casimir wormholes. Our analysis demonstrates that in the context of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></math></span> gravity, exotic matter can sustain these wormholes. We further examine the traversability conditions of the wormhole, considering both scenarios with and without the Generalized Uncertainty Principle (GUP) correction. Additionally, the stability of the wormhole is assessed based on equilibrium conditions. Our findings suggest that <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></math></span> gravity offers a viable framework for the existence of stable, traversable wormholes sustained by exotic matter, potentially expanding the landscape of viable wormhole solutions beyond the confines of GR.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100378"},"PeriodicalIF":10.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767873","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}

{"title":"Broadband spectral and emission geometry analysis of XB 1916–053 with Chandra and NuSTAR","authors":"Rahul Sharma","doi":"10.1016/j.jheap.2025.100376","DOIUrl":"10.1016/j.jheap.2025.100376","url":null,"abstract":"<div><div>We report results from a broad-band spectral analysis of the dipping neutron star low-mass X-ray binary XB 1916–053 using the <em>Chandra</em> and <em>Nuclear Spectroscopic Telescope Array (NuSTAR)</em> observation. The spectrum can be well described with a combination of emission from a multi-colour disk (<span><math><mi>k</mi><msub><mrow><mi>T</mi></mrow><mrow><mi>in</mi></mrow></msub><mo>∼</mo></math></span>0.7 keV), a single-temperature blackbody (<span><math><mi>k</mi><msub><mrow><mi>T</mi></mrow><mrow><mi>BB</mi></mrow></msub><mo>∼</mo></math></span>1.4 keV), and thermal Comptonization components (<span><math><mi>Γ</mi><mo>∼</mo><mn>1.9</mn><mo>;</mo><mspace></mspace><mi>k</mi><msub><mrow><mi>T</mi></mrow><mrow><mi>e</mi></mrow></msub><mo>∼</mo></math></span>17 keV), with the neutron star surface (or boundary layer) serving as the primary source of Comptonizing seed photons. The timing and spectral properties suggest that the source is in a soft state, albeit with a relatively high electron corona temperature. Additionally, absorption features were detected in the persistent spectrum from the highly ionized Si, S, Ar, Ca, Fe and a blend of highly ionized Fe K<em>β</em> and Ni K<em>α</em> transitions. These features suggest the presence of a highly ionized atmosphere above the accretion disk during persistent intervals. During the dipping intervals, the line of sight is obscured by the outer disk structure or bulge, which is denser and less ionized.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100376"},"PeriodicalIF":10.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748526","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}

{"title":"Constraining the parameters of heavy dark matter and memory-burdened primordial black holes with DAMPE electron measurements","authors":"Tian-Ci Liu ,&nbsp;Ben-Yang Zhu ,&nbsp;Yun-Feng Liang ,&nbsp;Xiao-Song Hu ,&nbsp;En-Wei Liang","doi":"10.1016/j.jheap.2025.100375","DOIUrl":"10.1016/j.jheap.2025.100375","url":null,"abstract":"<div><div>The DArk Matter Particle Explorer (DAMPE) is a space-based instrument for detecting GeV-TeV cosmic rays and gamma rays. High-energy cosmic rays could be emitted from several dark matter candidates theoretically, such as the heavy dark matter (HDM) and the primordial black holes (PBHs). HDM particles with a mass of <span><math><mo>&gt;</mo><mn>100</mn><mspace></mspace><mrow><mi>TeV</mi></mrow></math></span> could decay into ≳10 TeV electron/positron pairs. PBHs with a mass of <span><math><mo>≲</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>10</mn></mrow></msup><mspace></mspace><mi>g</mi></math></span> would survive to the present day if the Hawking radiation is significantly suppressed due to the memory burden effect and can also lead to the emission of ≳10 TeV electrons. In this work, we use the DAMPE electron measurements to obtain the constraints on the decay lifetime <em>τ</em> of HDM and the entropy index <em>k</em> of memory-burdened PBHs at 95% confidence level. The constraints on the fraction <span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>PBH</mi></mrow></msub></math></span> are also derived with a fixed <em>k</em>. Furthermore, the high-energy tail of the DAMPE electron spectrum shows a sign of going upwards, possibly suggesting the presence of an additional component; we discuss if this spectral behavior is real, which parameter space is required for it to be attributed to HDM or PBH. We will show that the required parameters have been constrained by existing limits.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100375"},"PeriodicalIF":10.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738895","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}

{"title":"Dark energy and cosmic evolution: A study in f(R,T) gravity","authors":"N. Myrzakulov ,&nbsp;S.H. Shekh ,&nbsp;Anirudh Pradhan ,&nbsp;Archana Dixit","doi":"10.1016/j.jheap.2025.100374","DOIUrl":"10.1016/j.jheap.2025.100374","url":null,"abstract":"<div><div>In the context of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity theory for the flat Friedmann-Lemaitre–Robertson–Walker (FLRW) model, the accelerating expansion of the universe is investigated using a specific form of the emergent Hubble parameter. Datasets from <span><math><mi>H</mi><mo>(</mo><mi>z</mi><mo>)</mo></math></span>, Type Ia supernovae (SNIa), and Baryon Acoustic Oscillations (BAO) are used to constrain the model and identify the ideal parameter values in order to evaluate the statistical significance of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity. The best-fit parameters are derived by solving the modified Friedmann equations through a MCMC analysis. These parameters are used to compute the equation of state, statefinders, energy conditions, and the <span><math><mo>(</mo><mi>ω</mi><mo>−</mo><msup><mrow><mi>ω</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>)</mo></math></span> plane. Furthermore, the evolution of kinematic cosmographic parameters is examined. The findings provide significant behavior and features of dark energy models. Our comprehension of the dynamics and evolution of the universe is improved by this study, which also advances our understanding of dark energy and how it shapes the universe. Also, a key outcome of our study is the demonstration that <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity can account for the Hubble tension through an evolving <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>, in agreement with recent findings in modified gravity. Our results provide a significant contribution to the ongoing discussion of modified gravity models and their role in explaining cosmic acceleration, offering an alternative perspective to the standard ΛCDM paradigm.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100374"},"PeriodicalIF":10.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748525","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}

{"title":"Dark Universe inspired by the Kaluza-Klein gravity and impact on primordial gravitational waves","authors":"Kimet Jusufi ,&nbsp;Giuseppe Gaetano Luciano ,&nbsp;Ahmad Sheykhi ,&nbsp;Daris Samart","doi":"10.1016/j.jheap.2025.100373","DOIUrl":"10.1016/j.jheap.2025.100373","url":null,"abstract":"<div><div>We explore the potential implications of Kaluza-Klein (KK) gravity in unifying the dark sector of the Universe. Through dimensional reduction in KK gravity, the 5D spacetime framework can be reformulated in terms of a 4D spacetime metric, along with additional scalar and vector fields. From the 4D perspective, this suggests the existence of a tower of particle states, including KK gravitons with massive spin-0 and spin-1 states, in addition to the massless spin-2 gravitons of general relativity (GR). The key idea in the present paper is the analogy with superconductivity theory. By assuming a minimal coupling between an additional complex scalar field and the gauge field, a “mass” term emerges for the spin-1 gravitons. This, in turn, leads to long-range gravitational effects that could modify Newton's law of gravity through Yukawa-type corrections. Assuming an environment-dependent mass for the spin-1 graviton, near the galactic center the repulsive force from this spin-1 graviton is suppressed by an additional attractive component from Newton's constant corrections, resulting in a Newtonian-like, attraction-dominated effect. In the galaxy's outer regions, the repulsive force fades due to its short range, making dark matter appear only as an effective outcome of the dominant attractive corrections. This approach also explains dark matter's emergence as an apparent effect on cosmological scales while our model is equivalent to the scalar-vector-tensor gravity theory. Finally, we examine the impact of dark matter on the primordial gravitational wave (PGW) spectrum and show that it is sensitive to dark matter effects, providing an opportunity to test this theory through future GW observatories.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100373"},"PeriodicalIF":10.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738894","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}

{"title":"LEIA in flight performance and variability of flux and spectra of some bright X-ray sources in the Galactic plane","authors":"Zi-Zeng Lv ,&nbsp;Chen Wang ,&nbsp;Jin-Yuan Liao ,&nbsp;Yuan Liu ,&nbsp;Shuang-Nan Zhang ,&nbsp;Huaqing Cheng ,&nbsp;Zhi-Xing Ling ,&nbsp;He-Yang Liu ,&nbsp;Hai-Wu Pan ,&nbsp;Wei-Min Yuan ,&nbsp;Chen Zhang","doi":"10.1016/j.jheap.2025.100371","DOIUrl":"10.1016/j.jheap.2025.100371","url":null,"abstract":"<div><div>We report the results of the first 2-year observations of LEIA in the Galactic plane and demonstrate its excellent performance. We select 34 sources for detailed analysis of their flux and spectral variability. Systematic errors are calculated and the observational performance differences between CMOS15 and CMOS16 are corrected. During the analysis of these sources, excess variance and standard <span><math><msup><mrow><mi>χ</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> tests are applied to characterize flux and spectral variability, respectively, and the distributions and their interrelations are analyzed. A variable flux is observed in most sources, with a more significant difference in flux variability observed closer to the Galactic Center. Two methods are employed to characterize spectral variability: fluctuations in the Hardness Ratio (HR) derived from count rates in the high-to-low energy bands, and variability in the photon index (Γ) obtained from spectral fitting. The results from both methods are broadly consistent. The findings suggest that the spectra of most XRBs are variable. Statistical analysis of flux and spectral variability for the sample sources reveals no significant correlation between the two. As a result, the first 2-year XRBs catalog of LEIA in the Galactic plane is presented. At the same time, the analysis of the sources indicate that the observation data of LEIA are usable and valuable, fulfilling its mission as the pathfinder of lobster-eye Wide-field X-ray Telescope onboard the Einstein Probe mission.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100371"},"PeriodicalIF":10.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704087","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}

{"title":"Cosmographic and thermodynamics analysis of five dimensional EChS gravity","authors":"Nadeem Azhar ,&nbsp;Abdul Jawad ,&nbsp;Iftikhar Ahmed ,&nbsp;Mohammad Mahtab Alam ,&nbsp;Sanjar Shaymatov","doi":"10.1016/j.jheap.2025.100369","DOIUrl":"10.1016/j.jheap.2025.100369","url":null,"abstract":"<div><div>In this study, we explore the five-dimensional Einstein-Chern-Simons gravity (EChS) gravity in the context of a flat FRW universe. This framework, derived by incorporating higher-dimensional topological invariants and gauge symmetries, serves as a compelling extension of general relativity. We employ the holographic dark energy model, using the Hubble horizon as the infrared cutoff, to investigate its cosmological implications. The distinctiveness of this approach lies in its inclusion of higher-order curvature corrections and alignment with holographic principles, making it a robust tool for analyzing modified gravity effects and cosmic evolution. Additionally, we examine various interaction terms <em>Q</em> and analyze key cosmological parameters, including the coincidence parameter, equation of state parameter, Hubble parameter, and deceleration parameter, to understand the universe's current dynamics. Lastly, the generalized second law of thermodynamics is evaluated to assess the thermodynamic behavior of the model. Notably, the findings of this research exhibit excellent agreement with recent observational data.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100369"},"PeriodicalIF":10.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696793","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}

{"title":"Photons shells inner structure and causal properties","authors":"D. Pugliese,&nbsp;Z. Stuchlík","doi":"10.1016/j.jheap.2025.100368","DOIUrl":"10.1016/j.jheap.2025.100368","url":null,"abstract":"<div><div>We shed light on some causal properties of the Kerr super-spinnars emerging through the investigation of the spacetimes photon shells. We define inner structure of the spacetime photon shell, constituted by regions distinguished by specific characteristics of the photons paths. These regions are reflected in the singularity shadow boundaries studied, in particular, in relation to repulsive gravity effects, known in a specific class of slowly spinning super-spinnars. Counter–rotating and co–rotating photons are particularly investigated. Super fast spinning solutions are characterized by “faint” shadow boundaries. The properties emerging from this analysis could be observed from specific regions of the spacetimes photon spheres boundaries. Slowly spinning super-spinnars, with (dimensionless) spin <span><math><mn>1</mn><mo>&lt;</mo><mi>a</mi><mo>≤</mo><mn>1.17996</mn></math></span>, are characterized by an articulated photon shell inner structure, evidenced close to the singularity rotational axis. This structure is analyzed for all view angles.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100368"},"PeriodicalIF":10.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644981","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}

{"title":"Einstein clusters as dark matter fluid-like models for constructing new wormhole solutions in f(R,Lm,T) gravity","authors":"A. Errehymy ,&nbsp;Y. Khedif ,&nbsp;M. Daoud ,&nbsp;K. Myrzakulov ,&nbsp;A.-H. Abdel-Aty ,&nbsp;K.S. Nisar","doi":"10.1016/j.jheap.2025.100370","DOIUrl":"10.1016/j.jheap.2025.100370","url":null,"abstract":"<div><div>This study explores traversable wormholes in <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity, which modifies traditional gravity by integrating the matter Lagrangian and the trace of the energy-momentum tensor. We define this modification as <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>,</mo><mi>T</mi><mo>)</mo><mo>=</mo><mi>R</mi><mo>+</mo><mi>λ</mi><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>+</mo><mi>χ</mi><mi>T</mi></math></span>, where <em>λ</em> and <em>χ</em> are coupling constants. Focusing on <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>=</mo><mo>−</mo><mi>ρ</mi></math></span>, where <em>ρ</em> represents the energy density and a constant redshift function <span><math><mover><mrow><mi>ν</mi></mrow><mrow><mo>ˆ</mo></mrow></mover><mo>(</mo><mi>r</mi><mo>)</mo></math></span>, we investigate the properties and gravitational lensing of Einstein clusters, formed by weakly interacting massive particles as dark matter halos. These clusters exhibit tangential pressure dominance, characterized by an equation of state where the tangential pressure <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>t</mi></mrow></msub></math></span> is proportional to the energy density <em>ρ</em> (i.e., <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>t</mi></mrow></msub><mo>=</mo><mi>σ</mi><mi>ρ</mi></math></span>, where <em>σ</em> is a constant), which can adjust anisotropy to model galactic rotation curves effectively. We derive the shape function under the influence of Einstein clusters and analyze the null energy condition's effect on matter distribution in anisotropic fluids. The stability of the resulting wormhole solutions is confirmed via the Tolman-Oppenheimer-Volkoff formalism. Our analysis of photon deflection along null geodesics shows that for <em>σ</em> in the range <span><math><mo>[</mo><mn>0</mn><mo>,</mo><mn>0.25</mn><mo>]</mo></math></span>, the deflection angle is negative, causing photons to bend outward. In contrast, for <em>σ</em> in the range <span><math><mo>[</mo><mo>−</mo><mn>0.25</mn><mo>,</mo><mn>0</mn><mo>]</mo></math></span>, the angles are positive, indicating that light rays curve inward toward the wormhole throat.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"47 ","pages":"Article 100370"},"PeriodicalIF":10.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696794","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}