Journal of Cosmology and Astroparticle Physics最新文献_第10页

Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation 来自 LISA 一阶相变的引力波：重建管道和物理学解释

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-03 DOI: 10.1088/1475-7516/2024/10/020

Chiara Caprini, Ryusuke Jinno, Marek Lewicki, Eric Madge, Marco Merchand, Germano Nardini, Mauro Pieroni, Alberto Roper Pol, Ville Vaskonen and the LISA Cosmology Working Group

{"title":"Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation","authors":"Chiara Caprini, Ryusuke Jinno, Marek Lewicki, Eric Madge, Marco Merchand, Germano Nardini, Mauro Pieroni, Alberto Roper Pol, Ville Vaskonen and the LISA Cosmology Working Group","doi":"10.1088/1475-7516/2024/10/020","DOIUrl":"https://doi.org/10.1088/1475-7516/2024/10/020","url":null,"abstract":"We develop a tool for the analysis of stochastic gravitational wave backgrounds from cosmological first-order phase transitions with LISA: we initiate a template databank for these signals, prototype their searches, and forecast their reconstruction. The templates encompass the gravitational wave signals sourced by bubble collisions, sound waves and turbulence. Accounting for Galactic and extra-Galactic foregrounds, we forecast the region of the parameter space that LISA will reconstruct with better than ∼ 10% accuracy, if certain experimental and theoretical uncertainties are solved by the time LISA flies. We illustrate the accuracy with which LISA can reconstruct the parameters on a few benchmark signals, both in terms of the template parameters and the phase transition ones. To show the impact of the forecasts on physics beyond the Standard Model, we map the reconstructed benchmark measurements into the parameter spaces of the singlet extension of the Standard Model and of the classically conformal invariant U(1)B-L model.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374087","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

Modular invariant slow roll inflation 模块不变慢速滚动膨胀

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-02 DOI: 10.1088/1475-7516/2024/10/016

Gui-Jun Ding, Si-Yi Jiang and Wenbin Zhao

引用次数: 0

Axion star condensation around primordial black holes and microlensing limits 原始黑洞周围的轴心星凝聚与微透镜极限

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-02 DOI: 10.1088/1475-7516/2024/10/013

Ziwen Yin and Luca Visinelli

引用次数: 0

Time-machines construct in f(ℛ, 𝒜, Aμν Aμν ) and f(ℛ) modified gravity theories f(ℛ, 𝒜, Aμν Aμν ) 和 f(ℛ) 修正引力理论中的时间机器构造

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-02 DOI: 10.1088/1475-7516/2024/10/015

F. Ahmed, J.C.R. de Souza and A.F. Santos

引用次数: 0

Gravitational wave background from primordial black holes in globular clusters 来自球状星团中原始黑洞的引力波背景

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-02 DOI: 10.1088/1475-7516/2024/10/014

Eleonora Vanzan, Sarah Libanore, Lorenzo Valbusa Dall'Armi, Nicola Bellomo and Alvise Raccanelli

引用次数: 0

Sound horizon independent constraints on early dark energy: the role of supernova data 独立于声界的早期暗能量约束：超新星数据的作用

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-01 DOI: 10.1088/1475-7516/2024/10/011

Joshua A. Kable and Vivian Miranda

{"title":"Sound horizon independent constraints on early dark energy: the role of supernova data","authors":"Joshua A. Kable and Vivian Miranda","doi":"10.1088/1475-7516/2024/10/011","DOIUrl":"https://doi.org/10.1088/1475-7516/2024/10/011","url":null,"abstract":"We assess the consistency of cosmological models that alter the size of the sound horizon at last scattering to resolve the Hubble tension with data from ACT + Planck CMB lensing, Big Bang Nucleosynthesis, and supernova data from Pantheon or Pantheon+. We use early dark energy (EDE) as an example model but conclude that the results could apply to other similar models. We constrain ΛCDM and EDE with these data finding that while they can constrain ΛCDM very tightly, EDE opens up the parameter space significantly and allows H0 > 72 km s-1Mpc-1. We combine these data with measurements from ACT + Planck TT650TEEE CMB primary anisotropy and galaxy baryon acoustic oscillations, and find that overall, EDE fits these data better than ΛCDM at ≈ 2σ. However, the fit to specifically the sound-horizon-independent measurements is worse for EDE than ΛCDM. We assess this increase in χ2 coming from the sound-horizon-independent measurements and find that the best-fit model is still consistent with a random statistical fluctuation even with H0 values around 72 km s-1Mpc-1. Finally, we find that supernova data play an important role in constraining EDE-like models with higher preferred values of Ωm, as preferred by Pantheon+, reducing the allowed parameter space for H0 values greater than 70 km s-1Mpc-1.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363038","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

Explaining PTA data with inflationary GWs in a PBH-dominated universe 用 PBH 主导宇宙中的暴胀 GW 解释 PTA 数据

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-01 DOI: 10.1088/1475-7516/2024/10/009

Satyabrata Datta

引用次数: 0

Gravitational waves from collapse of pressureless matter in the early universe 宇宙早期无压物质坍缩产生的引力波

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-01 DOI: 10.1088/1475-7516/2024/10/006

Ioannis Dalianis and Chris Kouvaris

{"title":"Gravitational waves from collapse of pressureless matter in the early universe","authors":"Ioannis Dalianis and Chris Kouvaris","doi":"10.1088/1475-7516/2024/10/006","DOIUrl":"https://doi.org/10.1088/1475-7516/2024/10/006","url":null,"abstract":"If an early matter phase of the Universe existed after inflation with the proper power spectrum, enhanced density perturbations can decouple from the Hubble flow, turn around and collapse. In contrast to what happens in a radiation dominated Universe where pressure nullifies deviations from sphericity in these perturbations, in a matter dominated Universe, the lack of pressure although on the one hand facilitates the gravitational collapse, it allows small deviations from sphericity to grow substantially as the collapse takes place. The subsequent collapse is complicated: initially as non-spherical deviations grow, the collapsing cloud takes the form of a “Zel'dovich pancake”. After that, the more chaotic and nonlinear stage of violent relaxation begins where shells of the cloud cross and the matter is redistributed within a factor of a few of the free fall timescale, reaching a spherical virialized state. During the whole process, strong gravitational waves are emitted due to the anisotropy of the collapse and the small time interval that the effect takes place. The emission of gravitational waves during the stage of the violent relaxation cannot be easily estimated with an analytical model. We perform an N-body simulation to capture the behaviour of matter during this stage in order to estimate the precise spectrum of gravitational waves produced in this scenario.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363033","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

Induced gravitational waves: the effect of first order tensor perturbations 诱导引力波：一阶张量扰动的影响

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-01 DOI: 10.1088/1475-7516/2024/10/010

Raphaël Picard and Karim A. Malik

{"title":"Induced gravitational waves: the effect of first order tensor perturbations","authors":"Raphaël Picard and Karim A. Malik","doi":"10.1088/1475-7516/2024/10/010","DOIUrl":"https://doi.org/10.1088/1475-7516/2024/10/010","url":null,"abstract":"Scalar induced gravitational waves contribute to the cosmological gravitational wave background. They can be related to the primordial density power spectrum produced towards the end of inflation and therefore are a convenient new tool to constrain models of inflation. These waves are sourced by terms quadratic in perturbations and hence appear at second order in cosmological perturbation theory. While the focus of research so far was on purely scalar source terms we also study the effect of including first order tensor perturbations as an additional source. This gives rise to two additional source terms: a term quadratic in the tensor perturbations and a cross term involving mixed scalar and tensor perturbations. We present full analytical expressions for the spectral density of these new source terms and discuss their general behaviour. To illustrate the generation mechanism we study two toy models containing a peak on small scales. For these models we show that the scalar-tensor contribution becomes non-negligible compared to the scalar-scalar contribution on smaller scales. We also consider implications for future gravitational wave surveys.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363037","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

Excess cataloged X-ray and radio sources at galaxy-cluster virial shocks 星系团病毒震荡处的过量编目X射线和射电源

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-10-01 DOI: 10.1088/1475-7516/2024/10/008

Gideon Ilani, Kuan-Chou Hou and Uri Keshet

引用次数: 0