Journal of Cosmology and Astroparticle Physics最新文献_第6页

Prospects for probing dark matter particles and primordial black holes with the Hongmeng mission using the 21 cm global spectrum at cosmic dawn 利用宇宙黎明21厘米全球光谱探测暗物质粒子和原始黑洞的前景

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/039

Meng-Lin Zhao, Sai Wang and Xin Zhang

{"title":"Prospects for probing dark matter particles and primordial black holes with the Hongmeng mission using the 21 cm global spectrum at cosmic dawn","authors":"Meng-Lin Zhao, Sai Wang and Xin Zhang","doi":"10.1088/1475-7516/2025/07/039","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/039","url":null,"abstract":"Probing dark matter particles and primordial black holes remains a pivotal challenge in modern cosmology. Exotic energy injections from dark matter annihilation, decay, and PBH Hawking evaporation can alter the thermal and ionization histories of the early universe, leaving distinctive imprints on the 21 cm global spectrum. We assess the potential of the upcoming space project, the Hongmeng mission, to probe dark matter particles and PBHs using the 21 cm global spectrum. Under ideal conditions with 1000 hours of integration time and negligible foreground residuals, the Hongmeng project can reach sensitivities to dark matter annihilation cross sections and decay lifetimes to 〈σv〉 ∼ 10-28 cm3 s-1 and τ ∼ 1028 s, respectively, for dark matter particles with a mass of 10 GeV. It can also probe PBHs with masses of 1016 g and abundances as low as fPBH ≃ 10-6. These results indicate that the Hongmeng mission can improve current constraints on dark matter annihilation, decay, and PBH Hawking radiation by nearly two orders of magnitude. Moreover, the Hongmeng mission surpasses current limits on sub-GeV dark matter probing and enables the probing of Hawking radiation from PBHs with masses above 1017 g, which remain undetectable through conventional cosmological means. Overall, the upcoming Hongmeng project holds great promise for advancing the investigation of both dark matter and PBHs, potentially deepening our understanding of the nature of dark matter.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"10 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639627","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}

引用次数: 0

Einstein ring of dust shells with quantum hair 带有量子毛的爱因斯坦尘壳环

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/041

Sojeong Cheong, Wontae Kim and Mungon Nam

{"title":"Einstein ring of dust shells with quantum hair","authors":"Sojeong Cheong, Wontae Kim and Mungon Nam","doi":"10.1088/1475-7516/2025/07/041","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/041","url":null,"abstract":"The information about the internal structure of a compact object is classically inaccessible to external observers. In this paper, we investigate how quantum corrections to gravitational fields can reveal the internal structure of compact objects composed of dust shells. Using an effective field theory approach to incorporate quantum corrections up to second order in curvature, we derive a quantum-corrected metric for N uniformly spaced shells with equal surface mass density and then examine how these corrections manifest in the deflection angle for gravitational lensing. In particular, we mainly investigate quantum-corrected astrophysical observables such as the Einstein ring and image magnification. Compared to the classical scenario, the deflection angle and the corresponding Einstein angle differ by a term that depends explicitly on the number of dust shells, which play the role of quantum hair. Specifically, the quantum correction to them diminishes as N increases, yet a finite deviation from the classical result remains even in the continuum limit N ⟶ ∞. Consequently, our results show that the internal structures of compact objects with identical mass and radius can be distinguished by quantum hair through their lensing observables.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"10 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639629","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}

引用次数: 0

gδN formalism gδN形式主义

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/045

Takahiro Tanaka and Yuko Urakawa

引用次数: 0

AKRA 2.0: Accurate Kappa Reconstruction Algorithm for masked shear catalog AKRA 2.0：掩模剪切目录的精确Kappa重建算法

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/038

Yuan Shi, Pengjie Zhang, Furen Deng, Shuren Zhou, Hongbo Cai, Ji Yao and Zeyang Sun

{"title":"AKRA 2.0: Accurate Kappa Reconstruction Algorithm for masked shear catalog","authors":"Yuan Shi, Pengjie Zhang, Furen Deng, Shuren Zhou, Hongbo Cai, Ji Yao and Zeyang Sun","doi":"10.1088/1475-7516/2025/07/038","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/038","url":null,"abstract":"Cosmic shear surveys serve as a powerful tool for mapping the underlying matter density field, including non-visible dark matter. A key challenge in cosmic shear surveys is the accurate reconstruction of lensing convergence (κ) maps from shear catalogs impacted by survey boundaries and masks, which seminal Kaiser-Squires (KS) method are not designed to handle. To overcome these limitations, we previously proposed the Accurate Kappa Reconstruction Algorithm (AKRA), a prior-free maximum likelihood map-making method. Initially designed for flat sky scenarios with periodic boundary conditions, AKRA has proven successful in recovering high-precision κ maps from masked shear catalogs. In this work, we upgrade AKRA to AKRA 2.0 by integrating the tools designed for spherical geometry. This upgrade employs spin-weighted spherical harmonic transforms to reconstruct the convergence field over the full sky. To optimize computational efficiency, we implement a scale-splitting strategy that segregates the analysis into two parts: large-scale analysis on the sphere (referred to as AKRA-sphere) and small-scale analysis on the flat sky (referred to as AKRA-flat); the results from both analyses are then combined to produce final reconstructed κ map. We tested AKRA 2.0 using simulated shear catalogs with various masks, demonstrating that the reconstructed κ map by AKRA 2.0 maintains high accuracy. For the reconstructed κ map in unmasked regions, the reconstructed convergence power spectrum Cκrec and the correlation coefficient with the true κ map rℓ achieve accuracies of (1-Cℓrec/Cℓtrue) ≲ 1% and (1-rℓ) ≲ 1%, respectively. Our algorithm is capable of straightforwardly handling further issues such as inhomogeneous shape measurement noise, which we will address in subsequent analysis.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"8 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639643","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}

引用次数: 0

Probing the self-coherence of primordial quantum fluctuations with complexity 用复杂性探测原始量子涨落的自相干性

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/036

Arpan Bhattacharyya, Suddhasattwa Brahma, S. Shajidul Haque, Jacob S. Lund and Arpon Paul

引用次数: 0

Signatures of NED on quasi periodic oscillations of a magnetically charged black hole 磁荷黑洞准周期振荡的NED特征

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/035

Bidyut Hazarika, Mrinnoy M. Gohain and Prabwal Phukon

{"title":"Signatures of NED on quasi periodic oscillations of a magnetically charged black hole","authors":"Bidyut Hazarika, Mrinnoy M. Gohain and Prabwal Phukon","doi":"10.1088/1475-7516/2025/07/035","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/035","url":null,"abstract":"In this work, we explore the influence of nonlinear electrodynamics (NED) on the quasi-periodic oscillations (QPOs) of a magnetic charged black hole by analyzing the motion of test particles and their epicyclic frequencies. Starting from the effective potential, angular momentum, and energy of circular orbits, we examine how the NED parameter b alters the orbital dynamics. We find that as b increases, the system transitions smoothly from the Reissner-Nordström (RN) regime towards the Schwarzschild profile, with observable changes in the innermost stable circular orbit (ISCO) and Keplerian frequencies. We further investigate the variation in the radii of QPOs with respect to the NED parameter b by employing the PR, RP, WD, and ER models. We also perform Markov Chain Monte Carlo (MCMC) analysis using observational QPO data from a diverse set of black hole sources spanning stellar-mass, intermediate-mass, and supermassive regimes. The MCMC results yield consistent constraints on the parameter b across all mass regimes, indicating that NED effects leave a distinguishable signature on the QPO structure of a charged black hole.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"109 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640081","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}

引用次数: 0

Dynamical shortcomings in the Generalized SU(2) Proca theory: challenges for cosmic acceleration 广义SU(2) Proca理论的动力学缺陷：对宇宙加速的挑战

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/037

Santiago García-Serna, J. Bayron Orjuela-Quintana, Yeinzon Rodríguez, Gabriel Gómez and César A. Valenzuela-Toledo

{"title":"Dynamical shortcomings in the Generalized SU(2) Proca theory: challenges for cosmic acceleration","authors":"Santiago García-Serna, J. Bayron Orjuela-Quintana, Yeinzon Rodríguez, Gabriel Gómez and César A. Valenzuela-Toledo","doi":"10.1088/1475-7516/2025/07/037","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/037","url":null,"abstract":"The Generalized SU(2) Proca (GSU2P) theory has recently garnered attention for its potential to describe key phases of cosmic evolution, including primordial inflation and late-time accelerated expansion. However, its full cosmological implications remain unexplored. In this work, we perform a comprehensive analysis of the dynamical properties of the GSU2P theory in a flat, homogeneous, and isotropic spacetime, through a dynamical-system approach. Our analysis reveals the presence of three pairs of fixed points, one of them corresponding to de-Sitter expansion which may represent either a stable or unstable phase in the evolution of the universe. These points, nonetheless, give rise to an indeterminate or infinite Hubble parameter, which renders them cosmologically unviable. Additionally, we find two key pseudostationary states: the “attractor lines”, along which the system exhibits constant-roll dynamics, and the “central zone”, characterized by oscillatory radiation-like behaviour of the field. The dynamics within the central zone could represent a graceful exit from the primordial inflationary phase to a radiation dominated phase, or a state of the dark energy component prior to the late-time cosmic acceleration. However, within the central zone, the dynamics of the vector field leads to recurrent instances of a nonphysical expansion rate. The absence of a limit cycle in the central zone further exacerbates the issue, as the system may follow unbounded phase-space trajectories, and the expansion rate becomes complex once it escapes the region. Collectively, these challenges undermine the viability of the GSU2P theory as a cosmological model for cosmic acceleration.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"11 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639626","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}

引用次数: 0

Bispectrum constraints on Primordial Non-Gaussianities with the eBOSS DR16 quasars eBOSS DR16类星体原始非高斯性的双谱约束

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/043

Marina S. Cagliari, Matilde Barberi-Squarotti, Kevin Pardede, Emanuele Castorina and Guido D'Amico

{"title":"Bispectrum constraints on Primordial Non-Gaussianities with the eBOSS DR16 quasars","authors":"Marina S. Cagliari, Matilde Barberi-Squarotti, Kevin Pardede, Emanuele Castorina and Guido D'Amico","doi":"10.1088/1475-7516/2025/07/043","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/043","url":null,"abstract":"We present constraints on fNL, the parameter quantifying the amplitude of local Primordial Non-Gaussianities (PNG), from a combined analysis of the tree-level power spectrum and bispectrum of Data Release 16 (DR16) of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) quasar sample. In our analysis, we use the power spectrum measured with the optimal redshift weights that maximize the local PNG information together with the bispectrum estimated with the standard Feldman-Kaiser-Peacock weights. In the modeling, we incorporate the global and radial integral constraint corrections both in the power spectrum and in the bispectrum, for which we observe that only the radial integral constraint correction has a significant impact. Our constraints read -6 < fNL < 20 at 68% confidence level and improve by ∼ 16% over the previous power spectrum analysis of the same dataset. We observe the same improvement over the power spectrum analysis when the quasar response to PNG is lower. In this case, we find -23 < fNL < 14 at 68% confidence level. Our findings are consistent with the Fisher matrix expectations.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"24 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639630","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}

引用次数: 0

Violation of Bell inequalities from Cosmic Microwave Background data 宇宙微波背景数据中贝尔不等式的违反

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/044

Roberto Dale, Jesús M. Gandía, Juan Antonio Morales-Lladosa and Ramon Lapiedra

{"title":"Violation of Bell inequalities from Cosmic Microwave Background data","authors":"Roberto Dale, Jesús M. Gandía, Juan Antonio Morales-Lladosa and Ramon Lapiedra","doi":"10.1088/1475-7516/2025/07/044","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/07/044","url":null,"abstract":"In a recent paper [R. Dale. R. Lapiedra, and J. A. Morales-Lladosa, Phys. Rev. D107 (2023) 023506] a cosmic-like Clauser-Horne-Shimony-Holt (CHSH) inequality was proved for the temperature fluctuations δT of the perturbed Cosmic Microwave Background (CMB), assuming local realism. This inequality can be tested from observational data. In fact, no violation for it has been found from the CMB data provided by the COBE satellite in different sky directions. This is a result which, being negative, is not conclusive in relation to the possible violation of the CHSH inequality in a cosmological context. So, the preceding analysis needs to be extended by using more precise current CMB data, like those provided by WMAP and Planck satellites. This is a task of considerable importance but, technically, much more involved in data treatments. In the present, assuming again local realism behind measurements and observational data, this extension is accomplished. The result is that a sound violation of the CHSH inequality is found, which would mean the failure of the assumed local realism in accordance with the quantum origin of the primordial temperature fluctuations in the framework of standard inflation and the orthodox interpretation of the Quantum Mechanics.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"2 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639631","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}

引用次数: 0

Bounds on neutrino-DM interactions from TXS 0506+056 neutrino outburst txs0506 +056中微子爆发中中微子- dm相互作用的边界

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-14 DOI: 10.1088/1475-7516/2025/07/042

Gabriel D. Zapata, Joel Jones-Pérez and Alberto M. Gago

引用次数: 0