Journal of High Energy Astrophysics最新文献

{"title":"Fermi-large area telescope detection of very high energy (>100 GeV) emission from misaligned jetted active galactic nuclei","authors":"Gunjan Tomar ,&nbsp;Vaidehi S. Paliya ,&nbsp;D.J. Saikia ,&nbsp;C.S. Stalin","doi":"10.1016/j.jheap.2025.100454","DOIUrl":"10.1016/j.jheap.2025.100454","url":null,"abstract":"<div><div>The detection of very-high-energy (VHE; &gt;100 GeV) <em>γ</em>-ray radiation from misaligned jetted Active Galactic Nuclei (AGN) challenges the emission models that primarily explain VHE emissions from beamed AGN, i.e., blazars. Using over 16 years of <em>Fermi</em>-Large Area Telescope (<em>Fermi</em>-LAT) Pass 8 data in the energy range 0.1−2 TeV, we systematically explore the VHE emission from a recently published sample of 160 radio galaxies. We identify 12 sources detected at <span><math><mo>&gt;</mo><mn>4</mn><mi>σ</mi></math></span> confidence level (test statistic or TS&gt;16), including nine with TS&gt;25 and two Fanaroff-Riley type II objects. This detected sample includes seven out of eight previously known VHE objects. Two radio galaxies are detected in the VHE band for the first time, and we identify three promising candidates with 16&lt;TS&lt;25. Additionally, 13 objects are identified as candidate VHE emitters with at least one VHE photon detected with the <em>Fermi</em>-LAT. These findings expand the sample of known VHE-emitting radio galaxies, whose multiwavelength follow-up observations can help provide insights into the emission mechanisms, jet physics, and the contribution of misaligned AGN to the extragalactic <em>γ</em>-ray background.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100454"},"PeriodicalIF":10.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925421","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":"Empirical validation: Investigating the ΛsCDM model with new DESI BAO observations","authors":"Manish Yadav ,&nbsp;Archana Dixit ,&nbsp;Anirudh Pradhan ,&nbsp;M.S. Barak","doi":"10.1016/j.jheap.2025.100453","DOIUrl":"10.1016/j.jheap.2025.100453","url":null,"abstract":"<div><div>The ΛCDM model has long served as the cornerstone of modern cosmology, offering an elegant and successful framework for interpreting a wide range of cosmological observations. However, the rise of high-precision datasets has revealed statistically significant tensions, most notably the Hubble tension and the <span><math><msub><mrow><mi>S</mi></mrow><mrow><mn>8</mn></mrow></msub></math></span> discrepancy, which challenge the completeness of this standard model. In this context, we explore the <span><math><msub><mrow><mi>Λ</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>CDM model—an extension of ΛCDM featuring a single additional parameter, <span><math><msub><mrow><mi>z</mi></mrow><mrow><mi>†</mi></mrow></msub></math></span>, corresponding to a sign-switching cosmological constant. This minimal modification aims to alleviate key observational tensions without compromising the model's overall coherence. Recent findings present in the literature indicate that the <span><math><msub><mrow><mi>Λ</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>CDM model not only provides a better fit to Lyman-<em>α</em> forest data for <span><math><msub><mrow><mi>z</mi></mrow><mrow><mi>†</mi></mrow></msub><mo>&lt;</mo><mn>2.3</mn></math></span>, but also accommodates both the SH0ES measurement of <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> and the angular diameter distance to the last scattering surface when 2D BAO data are included. We present a comprehensive analysis combining the full Planck 2018 CMB data, the Pantheon Type Ia Supernovae sample, and the recently released Baryon Acoustic Oscillation (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI). Our finding reveal that the Preliminary DESI results, a possible 3.9<em>σ</em> deviation from ΛCDM expectations, reinforce the importance of exploring such dynamic dark energy frameworks. In sum, our study underscores the potential of <span><math><msub><mrow><mi>Λ</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>CDM to reconcile multiple cosmological tensions and sheds light on the role of upcoming high-precision observations in reshaping our understanding of the universe's expansion history and the nature of dark energy.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100453"},"PeriodicalIF":10.5,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922633","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":"Ultra-high energy cosmic rays with UFA-15 source model in Bumblebee gravity theory","authors":"Swaraj Pratim Sarmah,&nbsp;Pranjal Sarmah,&nbsp;Umananda Dev Goswami","doi":"10.1016/j.jheap.2025.100451","DOIUrl":"10.1016/j.jheap.2025.100451","url":null,"abstract":"<div><div>We explore the effects of Bumblebee gravity on the propagation of ultra-high energy cosmic rays (UHECRs) using astrophysical sources modeled in the Unger-Farrar-Anchordoqui (UFA) framework (2015), which includes star formation rate (SFR), gamma-ray bursts (GRBs), and active galactic nuclei (AGN). We compute the density enhancement factor for various source separations distances (<span><math><msub><mrow><mi>d</mi></mrow><mrow><mtext>s</mtext></mrow></msub></math></span>s) up to 100 Mpc within the Bumblebee gravity scenario. Additionally, we calculate the CRs flux and their suppression, goodness-of-fit values obtained from comparisons with observational data from the Pierre Auger Observatory (PAO) and the Telescope Array experiment data for the flux and the Levenberg-Marquardt algorithm for suppression. The anisotropy in the CRs arrival directions is examined, with corresponding goodness-of-fit values obtained from the PAO surface detector data (SD 750 and SD 1500). Finally, we present skymaps of flux and anisotropy under different model assumptions, providing insights into the observational signatures of UHECRs in Bumblebee gravity. We show that Bumblebee gravity stands as a viable cosmological model for explaining key observational features of UHECRs, including spectrum, composition and anisotropy. Our results show that increasing the Bumblebee gravity parameter <em>l</em> enhances the density factor <em>ξ</em>, particularly at low energies, highlighting Lorentz violation's impact on CRs' propagation. Larger <span><math><msub><mrow><mi>d</mi></mrow><mrow><mtext>s</mtext></mrow></msub></math></span> values amplify deviations from the ΛCDM model, with AGN sources dominating at high energies and GRB/SFR sources at lower energies. The skymaps indicate the structured flux patterns at large <span><math><msub><mrow><mi>d</mi></mrow><mrow><mtext>s</mtext></mrow></msub></math></span> and structured anisotropies at higher energies.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100451"},"PeriodicalIF":10.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896752","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":"NuSTAR discovers a long type-I X-ray burst from the clocked burster GS 1826-24","authors":"Aditya S. Mondal ,&nbsp;Mayukh Pahari ,&nbsp;Gulab C. Dewangan","doi":"10.1016/j.jheap.2025.100450","DOIUrl":"10.1016/j.jheap.2025.100450","url":null,"abstract":"<div><div>The source GS 1826-24 is a neutron star low mass X-ray binary known as the “clocked burster” because of its extremely regular bursting behavior. We report on the detection of a long type-I X-ray burst from this source. We perform a detailed spectroscopic analysis of the long X-ray burst, lasting for ∼600 s, seen in the <em>NuSTAR</em> observation carried out on 2022 September. The persistent emission is well described by an absorbed thermal Comptonization model <span>nthcomp</span>, and the source exhibits a soft spectral state during this observation. The observed burst exhibits a rise time of ∼25 s and a decay time of ∼282 s. The time-resolved spectroscopy of the burst shows a significant departure from a pure thermal spectrum and is described with a model consisting of a varying-temperature blackbody plus an evolving persistent emission component. We observe a significant enhancement in the persistent emission during the burst. The enhancement of the pre-burst persistent flux is possibly due to Poynting-Robertson drag or coronal reprocessing. At the peak of the burst, the blackbody temperature and the blackbody emitting radius reached a maximum of <span><math><mn>2.10</mn><mo>±</mo><mn>0.07</mn></math></span> keV and <span><math><mn>5.5</mn><mo>±</mo><mn>2.1</mn></math></span> km, respectively. The peak flux (<span><math><msub><mrow><mi>F</mi></mrow><mrow><mi>p</mi><mi>e</mi><mi>a</mi><mi>k</mi></mrow></msub></math></span>) during the burst is <span><math><mo>≈</mo><mn>2.4</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup></math></span> ergs cm⁻² s⁻¹, which corresponds to a luminosity of <span><math><mo>≈</mo><mn>9.7</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>37</mn></mrow></msup></math></span> ergs s⁻¹.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100450"},"PeriodicalIF":10.5,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863744","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":"Comparative analysis of machine learning techniques for feature selection and classification of Fast Radio Bursts","authors":"Ailton J.B. Júnior ,&nbsp;Jéferson A.S. Fortunato ,&nbsp;Leonardo J. Silvestre ,&nbsp;Thonimar V. Alencar ,&nbsp;Wiliam S. Hipólito-Ricaldi","doi":"10.1016/j.jheap.2025.100449","DOIUrl":"10.1016/j.jheap.2025.100449","url":null,"abstract":"<div><div>Fast Radio Bursts (FRBs) are millisecond-duration radio transients of extragalactic origin, exhibiting a wide range of physical and observational properties. Distinguishing between repeating and non-repeating FRBs remains a key challenge in understanding their nature. In this work, we apply unsupervised machine learning techniques to classify FRBs based on both primary observables from the CHIME catalog and physically motivated derived features. We evaluate three hybrid pipelines combining dimensionality reduction with clustering: Principal Component Analysis (PCA) + k-means, t-distributed Stochastic Neighbor Embedding (t-SNE) + Hierarchical Density-Based Spatial Clustering of Applications with Noise (HDBSCAN), and t-SNE + Spectral Clustering. To identify optimal hyperparameters, we implement a comprehensive grid search using a custom scoring function that prioritizes recall while penalizing excessive cluster fragmentation and noise. Feature relevance is assessed using principal component loadings, mutual information with the known repeater label, and permutation-based F₂ score sensitivity. Our results demonstrate that the derived features, including redshift, luminosity, and spectral properties, such as the spectral index and the spectral running, significantly enhance the classification performance. Finally, we identify a set of FRBs currently labeled as non-repeaters that consistently cluster with known repeaters across all methods, highlighting promising candidates for future follow-up observations and reinforcing the utility of unsupervised approaches in FRB population studies.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100449"},"PeriodicalIF":10.5,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879160","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":"Lorentz violation with gravitational waves: Constraints from NANOGrav and IPTA data","authors":"Alireza Allahyari ,&nbsp;Mohammadreza Davari ,&nbsp;David F. Mota","doi":"10.1016/j.jheap.2025.100448","DOIUrl":"10.1016/j.jheap.2025.100448","url":null,"abstract":"<div><div>We explore a theoretical framework in which Lorentz symmetry is explicitly broken by incorporating derivative terms of the extrinsic curvature into the gravitational action. These modifications introduce a scale-dependent damping effect in the propagation of gravitational waves (GWs), governed by a characteristic energy scale denoted as <span><math><msub><mrow><mi>M</mi></mrow><mrow><mtext>LV</mtext></mrow></msub></math></span>. Tightest constraints on <span><math><msub><mrow><mi>M</mi></mrow><mrow><mtext>LV</mtext></mrow></msub></math></span> are achieved when we assume GWs have a primordial origin. In this scenario, we derive the modified spectral energy density of GWs and confront it with recent observational data from the NANOGrav 15-year dataset and the second data release of the International Pulsar Timing Array (IPTA). Our analysis yields a lower bound on the Lorentz-violating energy scale, finding <span><math><msub><mrow><mi>M</mi></mrow><mrow><mtext>LV</mtext></mrow></msub><mo>&gt;</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>19</mn></mrow></msup></math></span> GeV at 68% confidence level. This result significantly improves upon previous constraints derived from LIGO/VIRGO binary merger observations. Our findings demonstrate the potential of pulsar timing arrays to probe fundamental symmetries of spacetime and offer new insights into possible extensions of general relativity.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100448"},"PeriodicalIF":10.5,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860606","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":"The role of r-modes in pulsar spin-down, pulsar timing, and gravitational waves","authors":"Xiyuan Li ,&nbsp;Shahram Abbassi ,&nbsp;Varenya Upadhyaya ,&nbsp;Xiyang Zhang ,&nbsp;S.R. Valluri","doi":"10.1016/j.jheap.2025.100446","DOIUrl":"10.1016/j.jheap.2025.100446","url":null,"abstract":"<div><div>We investigate the role of r-mode oscillations in pulsar spin-down and their implications for gravitational wave emission and pulsar timing analysis. Using a non-linear differential framework that includes r-mode contributions, we derive time-dependent solutions for rotational frequency and period evolution. These expressions are validated using observational data from the Crab pulsar with high precision. By analytically fitting braking indices and spin-down coefficients, we link measurable pulsar properties to gravitational wave signatures. Furthermore, we present closed-form expressions for neutron star compactness and tidal deformability using Lambert W and Lambert–Tsallis functions, enabling model-independent inferences from r-mode gravitational wave frequencies. Our results show that incorporating r-modes significantly improves the accuracy of spin-down models and continuous wave detectability, particularly through the inclusion of high-order frequency terms. This framework supports the modeling of timing residuals, glitch quantification, and gravitational wave constraints. Our findings have direct relevance for data analysis in ongoing and future gravitational wave observatories.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100446"},"PeriodicalIF":10.5,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831592","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":"Maximum mass of singularity-free anisotropic compact stars in Rastall theory of gravity","authors":"Sourav Biswas,&nbsp;Debadri Bhattacharjee,&nbsp;Pradip Kumar Chattopadhyay","doi":"10.1016/j.jheap.2025.100445","DOIUrl":"10.1016/j.jheap.2025.100445","url":null,"abstract":"<div><div>The current model explores spherically symmetric anisotropic compact stars within the Rastall theory of gravity. By employing the Krori and Barua metric ansatz <span><span>Krori and Barua (1975)</span></span>, we derive a set of tractable, singularity-free relativistic solutions to the Einstein field equations. Using a best-fit equation for the numerical solution of the TOV equation, we determine the maximum mass and corresponding radius in this model. Our findings reveal that an increase in the Rastall parameter (<em>ξ</em>) leads to a higher maximum mass, indicating a stiffer nature of the equation of state. For <em>ξ</em> values ranging from 0.01 to 0.09, we calculate the maximum mass to be between <span><math><mn>2.24</mn><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></math></span> and <span><math><mn>2.36</mn><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></math></span>, with corresponding radii from 9.48 to 10.15 km. Furthermore, our model's predictions for the radii of recently observed pulsars are consistent with observational data. The model satisfies essential criteria for causality, energy conditions, and stability, confirming its viability and physical acceptability as a stellar structure.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100445"},"PeriodicalIF":10.5,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809397","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":"Yano-Schrödinger hyperfluid: Cosmological implications","authors":"Himanshu Chaudhary ,&nbsp;Saddam Hussain","doi":"10.1016/j.jheap.2025.100447","DOIUrl":"10.1016/j.jheap.2025.100447","url":null,"abstract":"<div><div>Perfect cosmological hyperfluids generalize the concept of a perfect fluid within the framework of metric affine gravity. These hyperfluids encode the microstructure of matter including shear, dilation, and spin via the hypermomentum tensor. In this paper, we focus on the observational constraints of the recently introduced Yano-Schrödinger hyperfluid, which sources a special type of nonmetricity, that preserves the lengths of vectors under autoparallel transport. We propose a model in which the effective nonmetricity contributions to pressure and matter density are related linearly as <span><math><msub><mrow><mi>p</mi></mrow><mrow><mtext>eff</mtext></mrow></msub><mo>=</mo><mi>ω</mi><msub><mrow><mi>ρ</mi></mrow><mrow><mtext>eff</mtext></mrow></msub></math></span>. This assumption allows for a straightforward parameterization of deviations from standard cosmological behavior while maintaining analytical tractability. To constrain the effective equation of state parameter <em>ω</em>, we perform a Bayesian parameter estimation using Nested Sampling, implemented via the <span>PyPolyChord</span> library. We use Baryon Acoustic Oscillation measurements from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2), along with Type Ia supernova and Cosmic Chronometer data. In our analysis, we treat <span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span> as a free parameter, enabling late-time data to extract posterior distributions for the Hubble constant (<span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>) and the sound horizon (<span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>), along with the corresponding model parameters. Our results yield <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>=</mo><mn>67.4</mn><mo>±</mo><mn>4.0</mn></math></span> km s⁻¹ Mpc⁻¹ and <span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>=</mo><mn>148.8</mn><mo>±</mo><mn>7.4</mn></math></span> Mpc, with <span><math><mi>ω</mi><mo>=</mo><mo>−</mo><mn>0.488</mn></math></span>. Finally, we use the logarithm of the Bayes factor to compare different Yano-Schrödinger model against the ΛCDM model. We find that the LESC model provides a better fit to the data, suggesting that modifications to metric-affine gravity could offer viable alternatives to the standard cosmological paradigm.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100447"},"PeriodicalIF":10.5,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809398","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":"Investigating the cosmic distance duality relation with gamma-ray bursts","authors":"Anna Chiara Alfano ,&nbsp;Carlo Cafaro ,&nbsp;Salvatore Capozziello ,&nbsp;Orlando Luongo ,&nbsp;Marco Muccino","doi":"10.1016/j.jheap.2025.100444","DOIUrl":"10.1016/j.jheap.2025.100444","url":null,"abstract":"<div><div>Deviations from the so-called <em>cosmic distance duality relation</em> may result from systematic errors in distance measurements or, more interestingly, hint at new physics. Further, it can also be related to the Hubble constant tension between early and local measurements of <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>. Based on this, we test validity of this relation through a model-independent parameterization of the Hubble rate via the well-established Bézier polynomials approach. We seek for possible departures from the relation considering three parametrizations, i) a power-law correction, ii) a logarithmic correction and iii) a Padé series <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>n</mi><mo>,</mo><mi>m</mi></mrow></msub><mo>(</mo><mi>z</mi><mo>)</mo></math></span> of order (1;2) with <span><math><mi>n</mi><mo>=</mo><mn>1</mn></math></span> being the order of the numerator while <span><math><mi>m</mi><mo>=</mo><mn>2</mn></math></span> is the order of the denominator. Then, assuming a flat scenario, we test them through Monte Carlo – Markov chain analyses that combine low- and intermediate/high-<em>z</em> data sets, such as observational Hubble data, the Pantheon catalog of type Ia supernovae, galaxy clusters, the second data release from the DESI Collaboration and gamma-ray bursts. In particular, we distinguish between <em>Analysis A</em> and <em>Analysis C</em>, depending whether the prompt emission <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>i</mi><mi>s</mi><mi>o</mi></mrow></msub><mo>−</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span> or the prompt-afterglow <span><math><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>−</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>p</mi></mrow></msub><mo>−</mo><mi>T</mi></math></span> gamma-ray burst correlations, respectively, is fit together with the other probes previously described. Our results seem to point towards a <em>no violation</em> of the cosmic distance duality relation and a preference towards Planck's value of <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>.</div></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":"49 ","pages":"Article 100444"},"PeriodicalIF":10.5,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144840845","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}