Journal of Cosmology and Astroparticle Physics最新文献_第4页

Probing cosmic magnetism with rotation measure-squared-galaxy cross-correlations 用旋转测量-星系的平方相互关系探测宇宙磁力

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-23 DOI: 10.1088/1475-7516/2026/07/096

Zekai Zhang and Adam Lidz

{"title":"Probing cosmic magnetism with rotation measure-squared-galaxy cross-correlations","authors":"Zekai Zhang and Adam Lidz","doi":"10.1088/1475-7516/2026/07/096","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/096","url":null,"abstract":"We present a new approach for extracting information about cosmic magnetic fields using cross-correlations between extragalactic Faraday rotation measure (RM) catalogs and galaxy surveys. Specifically, we propose measuring the two-point cross-correlation between RM squared, RM2, towards background sources and the projected density field of foreground galaxies, 〈RM2 × g〉, as a function of transverse separation. This statistic is analogous to the “projected fields” estimator used for the kinetic Sunyaev-Zel'dovich (kSZ) effect, 〈kSZ2 × g〉. Our estimator avoids contamination, on average, from RM contributions originating in the background source or the Milky Way, and is also free from the noise bias that arises when correlating the absolute value of the RMs with galaxies. Moreover, by binning in foreground galaxy redshifts, 〈RM2 × g〉 enables a tomographic reconstruction of the redshift evolution of large-scale cosmic magnetic fields. We model this statistic using the Illustris-TNG cosmological magnetohydrodynamic simulations and compare with approximate analytic predictions. In analogy with the kSZ case, we show that 〈RM2 × g〉 can be related to a bispectrum involving two copies of the electron-density-weighted magnetic field strength and one of the galaxy overdensity. On large scales, the correlation approximately traces the shape of the electron-galaxy two-point function, with an amplitude governed by the average electron-weighted magnetic field strength and the smoothing scale of the RM measurements. In Illustris-TNG, the effective field strength is primarily set by the magnetic field amplitudes within the inner regions of galaxy-hosting dark matter halos. It increases towards low redshift, driven by dynamo amplification and magnetized outflows. Our forecasts suggest that 〈RM2 × g〉 is detectable at high significance with current galaxy surveys and future RM catalogs from the SKA, offering a tomographic probe of large-scale magnetic fields across cosmic time.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"4 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148582194","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

Pushing the limits of atomic dark matter: First-principles recombination rates and cosmological constraints 推动原子暗物质的极限：第一性原理重组率和宇宙学约束

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-23 DOI: 10.1088/1475-7516/2026/07/090

Jared Barron, Rouven Essig, Megan H. McDuffie, Jesús Pérez-Ríos and Gregory Suczewski

{"title":"Pushing the limits of atomic dark matter: First-principles recombination rates and cosmological constraints","authors":"Jared Barron, Rouven Essig, Megan H. McDuffie, Jesús Pérez-Ríos and Gregory Suczewski","doi":"10.1088/1475-7516/2026/07/090","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/090","url":null,"abstract":"Minimal atomic dark matter with its distinctive cooling mechanisms offers an instructive framework for understanding the potential impact of dark matter on small-scale structure formation and early cosmology. The model consists of two fermions with opposite charges under a hidden Abelian gauge symmetry U(1)D and masses mpD and meD, respectively. Analogous to hydrogen in the Standard Model, these fermions interact via their own electromagnetic-like force, with a dark fine structure constant denoted by αD, and can bind into neutral atomic (and molecular) dark states. Previous work has largely focused on the benchmark scenario where the dark sector mirrors ordinary matter, with meD near the electron mass, mpD near the proton mass, and αD ∼ 1/137. We extend this analysis by investigating dark recombination and cooling physics across the full parameter space of masses and couplings. Combining Cosmic Microwave Background (CMB) measurements from Planck and ACT with BAO and Pantheon+ data, we place new constraints on the atomic dark matter parameter space, identifying regions where acoustic damping and recombination dynamics leave observable imprints on the CMB.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"6 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148582188","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

Beyond thermal approximations: precise cosmological bounds on axion-like particles 超越热近似：类轴子粒子的精确宇宙学边界

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-23 DOI: 10.1088/1475-7516/2026/07/099

Nicola Barbieri, Luca Caloni, Martina Gerbino, Massimiliano Lattanzi and Luca Visinelli

{"title":"Beyond thermal approximations: precise cosmological bounds on axion-like particles","authors":"Nicola Barbieri, Luca Caloni, Martina Gerbino, Massimiliano Lattanzi and Luca Visinelli","doi":"10.1088/1475-7516/2026/07/099","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/099","url":null,"abstract":"We derive updated cosmological bounds on light axion-like particles (ALPs) coupled to leptons or photons, using a full phase-space treatment of their production from the primordial thermal plasma. The ALP phase-space distribution, obtained by solving the momentum-dependent Boltzmann equation for the relevant production processes, is consistently propagated into the computation of cosmological observables, allowing us to assess the impact of non-thermal spectral distortions on the effective number of relativistic species, ΔNeff. Using state-of-the-art measurements of the cosmic microwave background from Planck, the Atacama Cosmology Telescope, and the South Pole Telescope, complemented with Big Bang Nucleosynthesis determinations of primordial deuterium and helium abundances, we obtain the following 95% credible limits on the ALP decay constant: fa > 1.63 × 106 GeV, 9.41 × 106 GeV and 8.06 × 104 GeV for ALPs coupled to electrons, muons and taus, respectively. For the ALP-photon coupling we find gaγ < 1.98 × 10-8 GeV-1. Including baryon acoustic oscillation data from the Dark Energy Spectroscopic Instrument mildly relaxes the constraints, in line with previous analyses of extra relativistic degrees of freedom. Finally, we present forecasts for the LiteBIRD+Simons Observatory andLiteBIRD+CMB-HD configurations, discussing the importance of an exact phase-space treatment for robust cosmological bounds on ALP interactions.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"1 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148582198","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

Forecasting constraint on primordial black hole properties with the CSST 3×2 pt analysis 基于CSST 3×2 pt分析的原始黑洞性质预测约束

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/086

Dingao Hu, Yan Gong, Pengfei Su, Hengjie Lin, Haitao Miao, Qi Xiong and Xuelei Chen

{"title":"Forecasting constraint on primordial black hole properties with the CSST 3×2 pt analysis","authors":"Dingao Hu, Yan Gong, Pengfei Su, Hengjie Lin, Haitao Miao, Qi Xiong and Xuelei Chen","doi":"10.1088/1475-7516/2026/07/086","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/086","url":null,"abstract":"This study forecasts the constraints on the properties of primordial black holes (PBHs) as a cold dark matter component using the galaxy clustering, weak lensing, and galaxy-galaxy lensing (i.e. 3×2 pt) measurements from the upcoming Chinese Space Station Survey Telescope (CSST) photometric survey. Since PBHs formed via gravitational collapse in the early Universe, they can additionally affect the formation and evolution of the cosmic large-scale structure (LSS) through “Poisson” effect. We compute the angular power spectra for PBH-ΛCDM cosmology, and generate mock data based on the CSST instrumental and survey design. The Markov Chain Monte Carlo (MCMC) method is employed to constrain the free parameters, such as the product of the PBH fraction and mass fPBHmPBH and other cosmological parameters. The systematic parameters are also included in the fitting process, such as the parameters of baryonic effect, intrinsic alignment, galaxy bias, photometric redshift (photo-z) calibration, shear calibration, and noise terms. We find that the CSST 3×2 pt analysis can achieve tight constraints on fPBHmPBH, with 68% and 95% confidence levels (CLs) reaching < 103.9M⊙ and < 104.7M⊙, respectively. Additionally, the cosmological parameters, e.g. Ω_m, σ_8 and w, can be constrained with the precisions of 3.3%, 1.7%, 13%, respectively. This indicates that the CSST 3×2 pt analysis is a powerful tool to advance the PBH dark matter studies in the near future.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"22 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552452","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

Equatorial periodic orbits and gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matter 被完美流体暗物质包围的欧拉-海森堡黑洞中的赤道周期轨道和引力波特征

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/087

Dhruba Jyoti Gogoi, Jyatsnasree Bora and Ali Övgün

{"title":"Equatorial periodic orbits and gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matter","authors":"Dhruba Jyoti Gogoi, Jyatsnasree Bora and Ali Övgün","doi":"10.1088/1475-7516/2026/07/087","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/087","url":null,"abstract":"We investigate equatorial periodic orbits and their gravitational wave radiation in the spacetime of an Euler-Heisenberg (EH) black hole surrounded by perfect fluid dark matter (PFDM). The combined effects of quantum electrodynamic corrections and dark matter are incorporated through an effective metric, and the dynamics of timelike geodesics are analyzed using the effective potential formalism. We derive the conditions for marginally bound and innermost stable circular orbits, classify periodic trajectories using the rational parameter and topological indices, and identify a rich hierarchy of zoom-whirl motions in the strong-field regime. Gravitational wave signals from periodic orbits are computed using the numerical kludge method, revealing characteristic burst-like features associated with whirl phases. For the parameter ranges considered here, the PFDM contribution modifies the location of the stability thresholds and can suppress the waveform amplitude by moving the relevant portions of the orbit away from the strongest-field region. The Euler-Heisenberg term, because of its r-6 falloff, mainly affects the near-horizon part of the motion and can modify the high-frequency structure generated during whirl phases. These findings show that periodic timelike orbits provide a useful diagnostic of the interplay between nonlinear electromagnetic corrections and environmental matter in strong-field spacetimes.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"222 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552512","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

Fuzzy dark matter soliton core hosting a supermassive black hole as a dense low-mass perturber in strong gravitational lensing 模糊暗物质孤子核心承载着一个超大质量黑洞，在强引力透镜中充当密集的低质量摄动器

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/088

Masamune Oguri and Naoi Kubo

引用次数: 0

Controlled tension forecasting: Quantifying cross-probe biases in ω 0 ωa CDM 控制张力预测：量化ω 0 ωa CDM的交叉探针偏差

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/084

Seokcheon Lee

{"title":"Controlled tension forecasting: Quantifying cross-probe biases in ω 0 ωa CDM","authors":"Seokcheon Lee","doi":"10.1088/1475-7516/2026/07/084","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/084","url":null,"abstract":"Recent analyses combining DESI DR2 BAO, Planck CMB, and Pantheon+ SNe have reported mild deviations from the ΛCDM model. A central challenge is to determine whether these deviations reflect genuine dark-energy evolution or instead arise from cross-probe inconsistencies, prior choices, or mismatches in likelihood construction. Previous work demonstrated that imposing a biased supernova-motivated prior on Ωm0 can artificially displace the BAO-inferred (ω0,ωa) values from the ΛCDM expectation. A complementary pedagogic study further showed that differing degeneracy geometries among BAO, CMB, and SNe can generate apparent dark-energy evolution even when the underlying cosmology is exactly ΛCDM. Here we present a controlled tension-injection framework designed as a simplified mock-based diagnostic tool for studying how selected probe-level inconsistencies propagate into inferred dark-energy parameters. Self-consistent BAO, CMB, and SNe mock datasets are augmented with parameterized shifts in (Ωm0, H0), supernova absolute calibration, and the BAO sound-horizon scale rd. The resulting datasets are analyzed through a unified MCMC pipeline, enabling a direct assessment of how these controlled tensions propagate into biases in (ω0,ωa) and the pivot equation-of-state parameter ωp. The results should be interpreted within the restricted setup adopted here: The late-time sector is described in the CPL parametrization and the CMB is represented through compressed distance priors. In this sense, the framework is intended primarily as an illustrative and diagnostic device for identifying probe combinations and degeneracy directions that are more vulnerable to tension-induced dynamical-dark-energy-like shifts, rather than as a parametrization-independent or fully realistic prediction tool.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"3 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552406","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

Revisiting PBH accretion, evaporation and their cosmological consequences 重述PBH吸积、蒸发及其宇宙学后果

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/085

Jitumani Kalita and Debaprasad Maity

{"title":"Revisiting PBH accretion, evaporation and their cosmological consequences","authors":"Jitumani Kalita and Debaprasad Maity","doi":"10.1088/1475-7516/2026/07/085","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/085","url":null,"abstract":"Primordial black holes (PBHs) provide a unique probe of the early Universe. Their cosmological evolution is governed by the competition between mass accretion and Hawking evaporation. In this paper we look into the details impact of accretion. Most of the earlier analysis relied on non-relativistic accretion models. In this work, we reinvestigate this in a fully relativistic framework for Kerr PBHs in the radiation-dominated era. We derive relativistic accretion rate and compute spin-dependent efficiency λKerr(a*). Using this result, we construct coupled evolution equations for the PBH mass and spin that include both relativistic accretion and spin-dependent evaporation. Our analysis shows that relativistic accretion significantly increases PBH masses and consequently suppresses their spins, causing all PBHs to become effectively Schwarzschild well before evaporation. These effects strengthen the Big Bang Nucleosynthesis (BBN) bound on the initial PBH mass by a factor of ∼4–5, reduce the mass required for survival to the present epoch to ∼2.7 × 1014 g, and shift the viable particle like DM parameter space. Notably the early accretion induced spin-down effect further washes out the well known high-frequency, spin-induced feature in the high frequency stochastic gravitational-wave background, modifying predictions for future detectors.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"54 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552453","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 primordial black holes with upcoming radio telescopes: a case study for LOFAR2.0, FAST Core Array and BINGO 用即将到来的射电望远镜探测原始黑洞：LOFAR2.0、FAST核心阵列和BINGO的案例研究

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-22 DOI: 10.1088/1475-7516/2026/07/089

Joao R.L. Santos, Guillem Domènech and Amilcar R. Queiroz

引用次数: 0

The Ellis and Baldwin test of the Cosmic Dipole: Exploring the impact of multiple flux density cuts 宇宙偶极子的埃利斯和鲍德温测试：探索多重通量密度削减的影响

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2026-07-21 DOI: 10.1088/1475-7516/2026/07/081

Vasudev Mittal and Geraint F. Lewis

{"title":"The Ellis and Baldwin test of the Cosmic Dipole: Exploring the impact of multiple flux density cuts","authors":"Vasudev Mittal and Geraint F. Lewis","doi":"10.1088/1475-7516/2026/07/081","DOIUrl":"https://doi.org/10.1088/1475-7516/2026/07/081","url":null,"abstract":"The cosmic dipole tension — the discrepancy between the Cosmic Microwave Background kinematic dipole and the matter dipole inferred from all-sky surveys poses a significant challenge to the Cosmological Principle, which dictates that the universe is homogeneous and isotropic at the largest scales. Traditional measurement of the matter dipole requires selecting an appropriate limiting flux and calculating the dipolar modulation using sources brighter than the flux. This approach, however, ignores the shape of the source luminosity function (LF) and deprives the analysis of this crucial information. In this study, we present a new approach to calculate the matter dipole by integrating the source flux distribution into the analysis. We achieve this by dividing the catalogue into disjoint flux bins and simultaneously fitting the matter dipole across them. For non-power-law LFs, this method gives a higher Bayes factor — and hence a better description of the matter dipole — as compared to the traditional approach. The method works best when the flux cuts are selected in regions where the LF's shape changes significantly. We discuss the feasibility of this method for upcoming cosmological surveys and show that it has the potential to yield decisive results at both radio and infrared wavelengths.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"32 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552180","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