Journal of Cosmology and Astroparticle Physics最新文献_第8页

The HalfDome multi-survey cosmological simulations: N-body simulations HalfDome多重宇宙学模拟：n体模拟

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/016

Adrian E. Bayer, Yici Zhong, Zack Li, Joseph DeRose, Yu Feng and Jia Liu

{"title":"The HalfDome multi-survey cosmological simulations: N-body simulations","authors":"Adrian E. Bayer, Yici Zhong, Zack Li, Joseph DeRose, Yu Feng and Jia Liu","doi":"10.1088/1475-7516/2025/05/016","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/016","url":null,"abstract":"Upcoming cosmological surveys have the potential to reach groundbreaking discoveries on multiple fronts, including the neutrino mass, dark energy, and inflation. Most of the key science goals require the joint analysis of datasets from multiple surveys to break parameter degeneracies and calibrate systematics. To realize such analyses, a large set of mock simulations that realistically model correlated observables is required. In this paper we present the N-body component of the HalfDome cosmological simulations, designed for the joint analysis of Stage-IV cosmological surveys, such as Rubin LSST, Euclid, SPHEREx, Roman, DESI, PFS, Simons Observatory, CMB-S4, and LiteBIRD. Our 300TB initial data release includes full-sky lightcones and halo catalogs between z = 0–4 for 11 fixed cosmology realizations, as well as an additional run with local primordial non-Gaussianity (fNL = 20). The simulations evolve 61443 particles in a 3.75 h-1 Gpc box, reaching a minimum halo mass of ∼6 × 1012h-1M⊙ and maximum scale of k ∼ h Mpc-1. Our data is publicly available: instructions to access the data and plans for future data releases can be found at https://halfdomesims.github.io.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"72 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927300","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

Model-independent cosmology with joint observations of gravitational waves and γ-ray bursts 独立于模型的宇宙学与引力波和γ射线暴的联合观测

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/021

Andrea Cozzumbo, Ulyana Dupletsa, Rodrigo Calderón, Riccardo Murgia, Gor Oganesyan and Marica Branchesi

{"title":"Model-independent cosmology with joint observations of gravitational waves and γ-ray bursts","authors":"Andrea Cozzumbo, Ulyana Dupletsa, Rodrigo Calderón, Riccardo Murgia, Gor Oganesyan and Marica Branchesi","doi":"10.1088/1475-7516/2025/05/021","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/021","url":null,"abstract":"Multi-messenger (MM) observations of binary neutron star (BNS) mergers provide a promising approach to trace the distance-redshift relation, crucial for understanding the expansion history of the Universe and, consequently, testing the nature of Dark Energy (DE). While the gravitational wave (GW) signal offers a direct measure of the distance to the source, high-energy observatories can detect the electromagnetic counterpart and drive the optical follow-up providing the redshift of the host galaxy. In this work, we exploit up-to-date catalogs of γ-ray bursts (GRBs) supposedly coming from BNS mergers observed by the Fermi γ-ray Space Telescope and the Neil Gehrels Swift Observatory, to construct a large set of mock MM data. We explore how combinations of current and future generations of GW observatories operating under various underlying cosmological models would be able to detect GW signals from these GRBs. We achieve the reconstruction of the GW parameters by means of a novel prior-informed Fisher matrix approach. We then use these mock data to perform an agnostic reconstruction of the DE phenomenology, thanks to a machine learning method based on forward modeling and Gaussian Processes (GP). Our study highlights the paramount importance of observatories capable of detecting GRBs and identifying their redshift. In the best-case scenario, the GP constraints are 1.5 times more precise than those produced by classical parametrizations of the DE evolution. We show that, in combination with forthcoming cosmological surveys, fewer than 40 GW-GRB detections will enable unprecedented precision on H0 and Ωm, and accurately reconstruct the DE density evolution.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"35 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927353","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

Harvesting primordial black holes from stochastic trees with FOREST 利用FOREST从随机树中获取原始黑洞

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/019

Chiara Animali, Pierre Auclair, Baptiste Blachier and Vincent Vennin

{"title":"Harvesting primordial black holes from stochastic trees with FOREST","authors":"Chiara Animali, Pierre Auclair, Baptiste Blachier and Vincent Vennin","doi":"10.1088/1475-7516/2025/05/019","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/019","url":null,"abstract":"We introduce a novel framework to implement stochastic inflation on stochastic trees, modelling the inflationary expansion as a branching process. Combined with the δ N formalism, this allows us to generate real-space maps of the curvature perturbation that fully capture quantum diffusion and its non-perturbative backreaction during inflation. Unlike lattice methods, trees do not proceed on a fixed background since new spacetime units emerge dynamically as trees unfold, naturally incorporating metric fluctuations. The recursive structure of stochastic trees also offers remarkable numerical efficiency, and we develop the FOrtran Recursive Exploration of Stochastic Trees (FOREST) tool and demonstrate its performance. We show how primordial black holes blossom at unbalanced nodes of the trees, and how their mass distribution can be obtained while automatically accounting for the “cloud-in-cloud” effect. In the “quantum-well” toy model, we find broad mass distributions, with mild power laws terminated by exponential tails. We finally compare our results with existing approximations in the literature and discuss several prospects.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"29 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927303","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

Effects of spacetime geometry on neutrino oscillation inside a core-collapse supernova 时空几何对核心坍缩超新星内部中微子振荡的影响

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/020

Indrajit Ghose and Amitabha Lahiri

引用次数: 0

Overcharging a nonsingular black hole in general relativity: the nonlinear electrodynamic field effects 广义相对论中的非奇异黑洞：非线性电动力场效应

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/022

Wei-Jie Miao and Si-Jiang Yang

{"title":"Overcharging a nonsingular black hole in general relativity: the nonlinear electrodynamic field effects","authors":"Wei-Jie Miao and Si-Jiang Yang","doi":"10.1088/1475-7516/2025/05/022","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/022","url":null,"abstract":"The Ayón-Beato García (ABG) solution describes a nonlinear electrodynamic nonsingular black hole in general relativity and can be regarded as a strong field correction to the Reissner-Nordström solution. We exam the possibility of destroying the ABG nonsingular black hole with a test charged particle and a complex scalar field. By comparing with the results of gadenken experiment to destroy the Reissner-Nordström black hole, we get the nonlinear electrodynamic field effects on the destruction of the event horizon. We obtain the parameter regions of the particle and scalar field, which allow us to destroy the event horizon of an extremal and near-extremal ABG black hole. Our findings show that both can be destroyed due to nonlinear electrodynamic effects. Interestingly, the parameter intervals for the charged particle and scalar field needed to destroy the event horizon of an extremal black hole are identical. Since the ABG black hole is nonsingular, our results remain consistent with the weak cosmic censorship conjecture and may offer a means to explore the interior of a black hole.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"108 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927339","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

Exact cosmological solutions with magnetic field in the theory of gravity with non-minimal kinetic coupling 非极小动力学耦合引力理论中带磁场的精确宇宙学解

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/018

Ruslan K. Muharlyamov, Tatiana N. Pankratyeva and Shehabaldeen O.A. Bashir

{"title":"Exact cosmological solutions with magnetic field in the theory of gravity with non-minimal kinetic coupling","authors":"Ruslan K. Muharlyamov, Tatiana N. Pankratyeva and Shehabaldeen O.A. Bashir","doi":"10.1088/1475-7516/2025/05/018","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/018","url":null,"abstract":"We investigate anisotropic and homogeneous cosmological models in the scalar-tensor theory of gravity with non-minimal kinetic coupling of a scalar field to the curvature given by the function η·(ϕ/2)· Gμν ∇μ∇νϕ in the Lagrangian. We assume that the space-times are filled a global unidirectional magnetic field that minimally interacts with the scalar field. The matter sector is not included, since the model is studied in relation to the early times of the Universe evolution. We limit ourselves to the period before and during primary inflation. The Horndeski theory allows anisotropy to grow over time. The question arises about isotropization. In the theory under consideration, a zero scalar charge imposes a condition on the anisotropy level, namely its dynamics develops in a limited region. This condition uniquely determines a viable branch of solutions of the field equations. The magnetic energy density that corresponds to this branch is a bounded function of time. The sign of parameter l = 1+εηΛ/μ determines the properties of cosmological models, where Λ is the cosmological constant, μ = M2PL is the Planck mass squared. The sign ε = ±1 defines the canonical scalar field and the phantom field, respectively. An inequality ε/η > 0 is a necessary condition for isotropization of models, but not sufficient. The model with l > 0 has the necessary properties: isotropization during expansion, rapid transition to inflationary expansion (a(t) ∝ e√(ε/3η)· t), absence of ghost and Laplace instabilities. In other cases l ≯ 0, the model has various disadvantages. Constraints on the tensor-to-scalar ratio, the conditions for avoidance of ghost and Laplacian instabilities lead to the inequalities: Λ > 0, η > 0, ε = 1, l < Λη/μ < 1.049.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"56 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927302","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

Shadow of slowly rotating Kalb-Ramond black holes 缓慢旋转的卡布-雷蒙黑洞的阴影

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-08 DOI: 10.1088/1475-7516/2025/05/017

Wentao Liu, Di Wu and Jieci Wang

{"title":"Shadow of slowly rotating Kalb-Ramond black holes","authors":"Wentao Liu, Di Wu and Jieci Wang","doi":"10.1088/1475-7516/2025/05/017","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/017","url":null,"abstract":"Real astronomical objects possess spin, yet deriving exact solutions for rotating black holes within gravitational theories is a formidable challenge. To understand the shadow of rotating black holes in Lorentz-violating spacetimes induced by antisymmetric tensor fields, known as Kalb-Ramond (KR) fields, we have focused on the slow-rotation approximation framework. Using this approach, we have obtained first-order rotation series solutions, which describe slowly rotating KR black holes. For this solutions, we have plotted the black hole shadow contours under various parameters using the numerical backward ray-tracing method. As the Lorentz-violating parameter increases, not only the apparent size of the black hole shadow decreases, but also the effects of rotation, such as the D-shaped structure and frame-dragging, are amplified. Furthermore, the KR field also enhances gravitational lensing, causing the shadow to occupy a larger area within the photon ring. This distinctive feature can differentiate KR gravity from general relativity. Additionally, using the latest observational data from EHT on M87* and Sgr A*, we have provided constraints on the Lorentz-violating parameter of rotating KR black holes. We found that, compared to static black holes, rotating black holes allow for the presence of stronger Lorentz violation effects.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"22 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927301","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

Cosmology with explicit and spontaneous background fields 具有明确和自发背景场的宇宙学

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-06 DOI: 10.1088/1475-7516/2025/05/014

Carlos M. Reyes, César Riquelme and Alex Soto

引用次数: 0

Flavor anisotropy in the high-energy astrophysical neutrino sky 高能天体物理中微子天空中的风味各向异性

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-06 DOI: 10.1088/1475-7516/2025/05/013

Bernanda Telalovic and Mauricio Bustamante

引用次数: 0

Bounds on new neutrino interactions from the first CEνNS data at direct detection experiments 直接探测实验中第一个CEνNS数据的新中微子相互作用边界

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-06 DOI: 10.1088/1475-7516/2025/05/012

Valentina De Romeri, Dimitrios K. Papoulias and Christoph A. Ternes

{"title":"Bounds on new neutrino interactions from the first CEνNS data at direct detection experiments","authors":"Valentina De Romeri, Dimitrios K. Papoulias and Christoph A. Ternes","doi":"10.1088/1475-7516/2025/05/012","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/05/012","url":null,"abstract":"Recently, two dark matter direct detection experiments have announced the first indications of nuclear recoils from solar 8B neutrinos via coherent elastic neutrino-nucleus scattering (CEνNS) with xenon nuclei. These results constitute a turning point, not only for dark matter searches that are now entering the neutrino fog, but they also bring out new opportunities to exploit dark matter facilities as neutrino detectors. We investigate the implications of recent data from the PandaX-4T and XENONnT experiments on both Standard Model physics and new neutrino interactions. We first extract information on the weak mixing angle at low momentum transfer. Then, following a phenomenological approach, we consider Lorentz-invariant interactions (scalar, vector, axial-vector, and tensor) between neutrinos, quarks and charged leptons. Furthermore, we study the U(1)B-L scenario as a concrete example of a new anomaly-free vector interaction. We find that despite the low statistics of these first experimental results, the inferred bounds are in some cases already competitive. For the scope of this work we also compute new bounds on some of the interactions using CEνNS data from COHERENT and electron recoil data from XENONnT, LUX-ZEPLIN, PandaX-4T, and TEXONO. It seems clear that while direct detection experiments continue to take data, more precise measurements will be available, thus allowing to test new neutrino interactions at the same level or even improving over dedicated neutrino facilities.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"37 1","pages":"012"},"PeriodicalIF":6.4,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920097","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