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Constraint on neutrino statistics from cosmological data 宇宙学数据对中微子统计量的约束
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-26 DOI: 10.1088/1475-7516/2025/06/056
YiCheng Dai and Wei Liao
{"title":"Constraint on neutrino statistics from cosmological data","authors":"YiCheng Dai and Wei Liao","doi":"10.1088/1475-7516/2025/06/056","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/056","url":null,"abstract":"We investigate the impact of neutrino statistical property on cosmology and the constraints imposed by cosmological data on neutrino statistics. Cosmological data from probes such as Cosmic Microwave Background(CMB) radiation and Baryon Acoustic Oscillation(BAO) are used to constrain the statistical parameter of neutrino. This constraint is closely related to the degeneracy effects among neutrino statistical property, the sum of neutrino masses, and the Hubble constant. Our results show that purely bosonic neutrinos can be ruled out at 95% confidence level.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"20 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515984","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
Origin of cosmological neutrino mass bounds: background versus perturbations 宇宙中微子质量界的起源：背景与扰动
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-26 DOI: 10.1088/1475-7516/2025/06/058
Toni Bertólez-Martínez, Ivan Esteban, Rasmi Hajjar, Olga Mena and Jordi Salvado
{"title":"Origin of cosmological neutrino mass bounds: background versus perturbations","authors":"Toni Bertólez-Martínez, Ivan Esteban, Rasmi Hajjar, Olga Mena and Jordi Salvado","doi":"10.1088/1475-7516/2025/06/058","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/058","url":null,"abstract":"The cosmological upper bound on the total neutrino mass is the dominant limit on this fundamental parameter. Recent observations — soon to be improved — have strongly tightened it, approaching the lower limit set by oscillation data. Understanding its physical origin, robustness, and model-independence becomes pressing. Here, we explicitly separate for the first time the two distinct cosmological neutrino-mass effects: the impact on background evolution, related to the energy in neutrino masses; and the “kinematic” impact on perturbations, related to neutrino free-streaming. We scrutinize how they affect CMB anisotropies, introducing two effective masses enclosing background (∑ mνBackg.) and perturbations (∑ mνPert.) effects. We analyze CMB data, finding that the neutrino-mass bound is mostly a background measurement, i.e., how the neutrino energy density evolves with time. The bound on the “kinematic” variable ∑ mνPert.. is largely relaxed, ∑ mνPert. < 0.8 eV. This work thus adds clarity to the physical origin of the cosmological neutrino-mass bound, which is mostly a measurement of the neutrino equation of state, providing also hints to evade such a bound.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"25 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516146","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
Is leptogenesis during gravitational reheating flavourful? 重力再加热过程中的纤毛发生有味道吗？
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-26 DOI: 10.1088/1475-7516/2025/06/061
Basabendu Barman, Arghyajit Datta and Md Riajul Haque
{"title":"Is leptogenesis during gravitational reheating flavourful?","authors":"Basabendu Barman, Arghyajit Datta and Md Riajul Haque","doi":"10.1088/1475-7516/2025/06/061","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/061","url":null,"abstract":"We examine the impact of charged lepton Yukawa equilibration on leptogenesis during gravitational reheating. During the post-inflationary era, the inflaton field is assumed to oscillate around the minimum of a monomial potential, leading to the gravitational production of Standard Model (SM) particles, constituting the radiation bath. The heavy right-handed neutrinos (RHN), responsible for generating baryon asymmetry via leptogenesis, are also produced through graviton-mediated scattering of the homogeneous inflaton field and thermal bath, as well as from the inverse decay of the bath particles. By considering both minimal and non-minimal gravitational contributions to SM, we demonstrate that flavour effects can be safely neglected in the minimal reheating scenario. However, with large non-minimal coupling, these effects may become important, depending on the choice of the RHN mass. We identify the corresponding viable parameter space that satisfies the observed baryon asymmetry in each case.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"272 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515988","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
Long-lived quasinormal modes around regular black holes and wormholes in Covariant Effective Quantum Gravity 协变有效量子引力中规则黑洞和虫洞周围的长寿命准正态模
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-26 DOI: 10.1088/1475-7516/2025/06/057
B.C. Lütfüoğlu
{"title":"Long-lived quasinormal modes around regular black holes and wormholes in Covariant Effective Quantum Gravity","authors":"B.C. Lütfüoğlu","doi":"10.1088/1475-7516/2025/06/057","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/057","url":null,"abstract":"We study quasinormal modes of massive scalar and massless Dirac fields in the background of regular black holes and traversable wormholes arising in Covariant Effective Quantum Gravity. Using both the Jeffreys-Wentzel-Kramers-Brillouin approximation and time-domain integration, we analyze the impact of quantum corrections on the quasinormal spectra and late-time behavior of perturbations. Our results reveal the existence of slowly decaying, oscillatory tails and quasi-resonant modes in the scalar sector, particularly in the high-mass regime. In the fermionic case, the damping rate increases with the quantum correction parameter ξ, while the oscillation frequency decreases. We also observe pronounced echo-like structures in the time-domain profiles near the black hole-wormhole threshold. These findings provide insight into the dynamics of perturbations in quantum-corrected spacetimes and offer potential signatures for distinguishing black holes from wormholes in future gravitational wave observations.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"63 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515985","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
A revisited correction to the halo mass function for local-type primordial non-Gaussianity 对局域型原初非高斯性的光晕质量函数的重新修正
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-24 DOI: 10.1088/1475-7516/2025/06/053
L. Fiorino, S. Contarini, F. Marulli, A.G. Sánchez, M. Baldi, A. Fiorilli and L. Moscardini
{"title":"A revisited correction to the halo mass function for local-type primordial non-Gaussianity","authors":"L. Fiorino, S. Contarini, F. Marulli, A.G. Sánchez, M. Baldi, A. Fiorilli and L. Moscardini","doi":"10.1088/1475-7516/2025/06/053","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/053","url":null,"abstract":"We investigate the effect of primordial non-Gaussianities on halo number counts using N-body simulations with different values of fNLloc. We show how current theoretical models fail to adequately describe the non-Gaussian mass function of halos identified with different overdensity thresholds, Δb. We explain how these discrepancies are related to a variation in the density profile of dark matter halos, finding that the internal steepness (i.e. the compactness) of halos depends on the value of fNLloc. We then parametrize these deviations in halo number counts with a factor κ(Δb) that modifies the linear density threshold for collapse according to the halo identification threshold used, defined with respect to the Universe background density. We rely on a second-degree polynomial to describe κ and employ a Bayesian analysis to determine the coefficients of this polynomial. In addition, we verify the independence of the latter on the sign and absolute value of fNLloc. Finally, we show how this re-parametrization prevents the extraction of biased constraints on fNLloc, correcting for large systematic errors especially in the case of halos identified with high density thresholds. This improvement is crucial in the perspective of deriving cosmological constraints with the non-Gaussian mass function from real data, as different mass definitions can be employed depending on the properties of the survey.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"16 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479145","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
The Simons Observatory: validation of reconstructed power spectra from simulated filtered maps for the small aperture telescope survey 西蒙斯天文台：小口径望远镜巡天用模拟滤波图重建功率谱的验证
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-24 DOI: 10.1088/1475-7516/2025/06/055
Carlos Hervías-Caimapo, Kevin Wolz, Adrien La Posta, Susanna Azzoni, David Alonso, Kam Arnold, Carlo Baccigalupi, Simon Biquard, Michael L. Brown, Erminia Calabrese, Yuji Chinone, Samuel Day-Weiss, Jo Dunkley, Rolando Dünner, Josquin Errard, Giulio Fabbian, Ken Ganga, Serena Giardiello, Emilie Hertig, Kevin M. Huffenberger, Bradley R. Johnson, Baptiste Jost, Reijo Keskitalo, Theodore S. Kisner, Thibaut Louis, Magdy Morshed, Lyman A. Page, Christian L. Reichardt, Erik Rosenberg, Max Silva-Feaver, Wuhyun Sohn, Yoshinori Sueno, Dan B. Thomas, Ema Tsang King Sang, Amalia Villarrubia-Aguilar and Kyohei Yamada
{"title":"The Simons Observatory: validation of reconstructed power spectra from simulated filtered maps for the small aperture telescope survey","authors":"Carlos Hervías-Caimapo, Kevin Wolz, Adrien La Posta, Susanna Azzoni, David Alonso, Kam Arnold, Carlo Baccigalupi, Simon Biquard, Michael L. Brown, Erminia Calabrese, Yuji Chinone, Samuel Day-Weiss, Jo Dunkley, Rolando Dünner, Josquin Errard, Giulio Fabbian, Ken Ganga, Serena Giardiello, Emilie Hertig, Kevin M. Huffenberger, Bradley R. Johnson, Baptiste Jost, Reijo Keskitalo, Theodore S. Kisner, Thibaut Louis, Magdy Morshed, Lyman A. Page, Christian L. Reichardt, Erik Rosenberg, Max Silva-Feaver, Wuhyun Sohn, Yoshinori Sueno, Dan B. Thomas, Ema Tsang King Sang, Amalia Villarrubia-Aguilar and Kyohei Yamada","doi":"10.1088/1475-7516/2025/06/055","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/055","url":null,"abstract":"We present a transfer function-based method to estimate angular power spectra from filtered maps for cosmic microwave background (CMB) surveys. This is especially relevant for experiments targeting the faint primordial gravitational wave signatures in CMB polarisation at large scales, such as the Simons Observatory (SO) small aperture telescopes. While timestreams can be filtered to mitigate the contamination from low-frequency noise, usual methods that calculate the mode coupling at individual multipoles can be challenging for experiments covering large sky areas or reaching few-arcminute resolution. The method we present here, although approximate, is more practical and faster for larger data volumes. We validate it through the use of simulated observations approximating the first year of SO data, going from half-wave plate-modulated timestreams to maps, and using simulations to estimate the mixing of polarisation modes induced by an example of time-domain filtering. We show its performance through an example null test and with an end-to-end pipeline that performs inference on cosmological parameters, including the tensor-to-scalar ratio r. The performance demonstration uses simulated observations at multiple frequency bands. We find that the method can recover unbiased parameters for our simulated noise levels.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"34 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479141","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
Optimal parameterizations for observational constraints on thawing dark energy 暗能量融化观测约束的最优参数化
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-24 DOI: 10.1088/1475-7516/2025/06/054
David Shlivko, Paul J. Steinhardt and Charles L. Steinhardt
{"title":"Optimal parameterizations for observational constraints on thawing dark energy","authors":"David Shlivko, Paul J. Steinhardt and Charles L. Steinhardt","doi":"10.1088/1475-7516/2025/06/054","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/054","url":null,"abstract":"Time-varying dark energy is often modeled in observational analyses through generic parameterizations of its equation of state w(z), which typically use two free parameters {w0, wa} to span a broad range of behaviors as a function of redshift. However, this broad range of behaviors can only approximately capture the dynamics of any given microphysical theory of dark energy. A complementary approach is to use targeted parameterizations designed to model specific classes of dynamical dark energy with greater precision. Focusing on the class of thawing dark energy, we quantify and compare the precision with which nineteen generic and targeted parameterizations can capture the dynamics of physically motivated thawing quintessence theories. We find that a targeted parameterization derived from a Padé expansion of w is the most reliable of these, producing accurate reconstructions of w(z), the expansion history H(z), and cosmological parameters such as H0 and Ωm for a broad range of microphysical theories.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"26 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479140","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
Misner-Sharp energy and P-V criticality in quasi-topological cosmology 准拓扑宇宙学中的Misner-Sharp能量和P-V临界
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-24 DOI: 10.1088/1475-7516/2025/06/052
Yue Chu, Shi-Bei Kong, Yang Liu, Hongsheng Zhang and Ya-Peng Hu
{"title":"Misner-Sharp energy and P-V criticality in quasi-topological cosmology","authors":"Yue Chu, Shi-Bei Kong, Yang Liu, Hongsheng Zhang and Ya-Peng Hu","doi":"10.1088/1475-7516/2025/06/052","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/052","url":null,"abstract":"We presented a sound foundation of thermodynamics for a Friedmann-Robertson-Walker (FRW) universe from the first principle in original work [33]. Based on such an approach, we explore the thermodynamics of cosmology in quasi-topology gravity. Starting from the unified first law, we first obtain the well-defined Misner-Sharp energy in quasi-topology cosmology. We demonstrate that the Misner-Sharp energy is equal to ρV inside the apparent horizon. Further, the unified first law requires extra terms for generalized force and conjugate generalized position, which are identified as thermodynamic pressure and thermodynamic volume, respectively. Hence we naturally derive the equation of state of the FRW universe in quasi-topology gravity, and show that it undergoes P-V phase transitions. We calculate the critical exponents for the phase transition, which may be beneficial to probe the micro theory of quasi-topology gravity.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"11 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479138","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
Regular black hole models in the transition from baryonic matter to quark matter 重子物质向夸克物质转变过程中的规则黑洞模型
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-24 DOI: 10.1088/1475-7516/2025/06/051
V. Vertogradov and A. Övgün
{"title":"Regular black hole models in the transition from baryonic matter to quark matter","authors":"V. Vertogradov and A. Övgün","doi":"10.1088/1475-7516/2025/06/051","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/051","url":null,"abstract":"In this paper, we investigate gravitational collapse scenarios involving baryonic matter transitioning into quark-gluon plasma under extreme astrophysical conditions, focusing on their implications for the formation of regular black holes. Standard gravitational collapse models inevitably predict central singularities, highlighting the limitations of classical general relativity in extreme density regimes. By introducing a physically motivated, inhomogeneous transition rate between baryonic and quark matter, we demonstrate analytically and numerically that it is possible to construct regular black hole solutions featuring a nonsingular de Sitter-like core. We further analyze the observable consequences of these models, particularly emphasizing modifications to the black hole shadow radius, which provide direct observational constraints accessible through Event Horizon Telescope (EHT) measurements.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"53 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479137","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
Bracketing the soliton-halo relation of ultralight dark matter 涵盖了超轻暗物质的孤子-光晕关系
IF 6.4 2区 物理与天体物理
Journal of Cosmology and Astroparticle Physics Pub Date : 2025-06-23 DOI: 10.1088/1475-7516/2025/06/050
Kfir Blum, Marco Gorghetto, Edward Hardy and Luca Teodori
{"title":"Bracketing the soliton-halo relation of ultralight dark matter","authors":"Kfir Blum, Marco Gorghetto, Edward Hardy and Luca Teodori","doi":"10.1088/1475-7516/2025/06/050","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/06/050","url":null,"abstract":"In theories of ultralight dark matter, solitons form in the inner regions of galactic halos. The observational implications of these depend on the soliton mass. Various relations between the mass of the soliton and properties of the halo have been proposed. We analyze the implications of these relations, and test them with a suite of numerical simulations. The relation of Schive et al. 2014 is equivalent to (E/M)sol = (E/M)halo where Esol(halo) and Msol(halo) are the energy and mass of the soliton (halo). If the halo is approximately virialized, this relation is parametrically similar to the evaporation/growth threshold of Chan et al. 2022, and it thus gives a rough lower bound on the soliton mass. A different relation has been proposed by Mocz et al. 2017, which is equivalent to Esol = Ehalo, so is an upper bound on the soliton mass provided the halo energy can be estimated reliably. Our simulations provide evidence for this picture, and are in broad consistency with the literature, in particular after accounting for ambiguities in the definition of Ehalo at finite volume.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"20 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479144","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
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