Alternative High-z Cosmic Tracers and the Dark Energy Equation of State
M. Plionis, R. Terlevich, S. Basilakos, F. Bresolin, E. Terlevich, J. Melnick, I. Georgantopoulos
备注:
19 pages, 11 figures, to appear in JOP, proceedings of the "Recent Developments in Gravity, NEB XIII" conference, held in Thessaloniki, Macedonia, Greece, 4-6 June 2008
我们建议用另一种宇宙示踪剂来测量宇宙的暗能量状态方程和物质含量[w(z)& Ω_m]。我们提出的方法包括两个部分:(a)跟踪哈勃关系使用HII类星暴星系,作为SNIa的替代品,它可以检测到非常大的红移,z~4,和(b)测量集群模式的X射线选择AGN的中值红移~1。该方法的每个组成部分本身都可以提供对宇宙学参数的有趣约束,特别是在我们预期我们将显著减少相应的随机误差和系统误差的情况下。然而,通过加入它们的似然函数,我们将能够施加严格的宇宙学约束,打破暗能量状态方程(无论是常数还是变量)与宇宙物质含量之间已知的简并性,并提供一个强大的替代方法来测量暗能量对全球动力学和状态方程的贡献。对X射线选定的活动星系核(基于小型XMM调查)和目前最大的SNIa样本(Kowalski et al 2008)的初步联合分析提供:Omega_m=0.28^{+0.02}_{-0.04}和w=-1.0 +-0.1。
英文摘要:
We propose to use alternative cosmic tracers to measure the dark energy equation of state and the matter content of the Universe [w(z) & Ω_m]. Our proposed method consists of two components: (a) tracing the Hubble relation using HII-like starburst galaxies, as an alternative to SNIa, which can be detected up to very large redshifts, z~4, and (b) measuring the clustering pattern of X-ray selected AGN at a median redshift of ~1. Each component of the method can in itself provide interesting constraints on the cosmological parameters, especially under our anticipation that we will reduce the corresponding random and systematic errors significantly. However, by joining their likelihood functions we will be able to put stringent cosmological constraints and break the known degeneracies between the dark energy equation of state (whether it is constant or variable) and the matter content of the universe and provide a powerful and alternative rute to measure the contribution to the global dynamics, and the equation of state, of dark energy. A preliminary joint analysis of X-ray selected AGN (based on a small XMM survey) and the currently largest SNIa sample (Kowalski et al 2008), provides: Omega_m=0.28^{+0.02}_{-0.04} and w=-1.0 +-0.1.
Formaldehyde Silhouettes Against the Cosmic Microwave Background: A Mass-Limited, Distance-Independent, Extinction-Free Tracer of Star Formation Across the Epoch of Galaxy Evolution
Pinpointing the cosmic web between massive galaxy clusters I. The incidence of HI and OVI as WHIM tracers
Pontificia Universidad Católica de Valparaíso(智利天主教瓦帕莱索大学);Universidad Técnica Federico Santa María(费德里科·圣塔玛丽亚理工大学);Leibniz-Institut for Astrophysik Potsdam (AIP)(波茨坦阿基米德天体物理研究所);The University of Tokyo(东京大学);University of California, Santa Cruz(加州大学圣克鲁兹分校);New Mexico State University(新墨西哥州立大学);University of Edinburgh(爱丁堡大学);University of Washington(华盛顿大学);CONICET-Universidad Nacional de Córdoba(阿根廷国家科学研究委员会-科尔多瓦国立大学)
The Back-in-time Void Finder: dynamical identification of cosmic voids through optimal transport reconstruction
Aix Marseille Université(艾克斯-马赛大学);CNRS/IN2P3, CPPM(法国国家科学研究中心/欧洲粒子物理研究所,普罗旺斯宇宙、粒子与物质物理中心);Dipartimento di Fisica e Astronomia “Augusto Righi” - Alma Mater Studiorum Università di Bologna(博洛尼亚大学物理与天文学系);Max Planck Institute for Extraterrestrial Physics(马克斯·普朗克地外物理研究所);SISSA, International School for Advanced Studies(国际高等研究院);ICSC - Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing(高性能计算、大数据与量子计算国家研究中心);INAF - Osservatorio Astronomico di Trieste(意大利国家天体物理研究所的里雅斯特天文台);INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚空间科学与天体物理观测站);INFN - Sezione di Bologna(意大利国家核物理研究所博洛尼亚分部)
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR16 luminous red galaxy and emission line galaxy samples: cosmic distance and structure growth measurements using multiple tracers in configuration space
Multi-tracer mass bias in matched cosmic voids from SDSS DR7 and the ELUCID constrained simulation
Shanghai Astronomical Observatory(上海天文台);Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University(上海交通大学物理与天文学院、汤忠道研究院);Shanghai Key Laboratory for Particle Physics and Cosmology, and Key Laboratory for Particle Physics, Astrophysics and Cosmology Ministry of Education, Shanghai Jiao Tong University(上海交通大学粒子物理与宇宙学上海市重点实验室、粒子物理、天体物理与宇宙学教育部重点实验室)
The Cosmic Web in the DESI Early Data Release: A Probabilistic Environment Catalog
Instituto de Física—FCEN, Universidad de Antioquia(安蒂奥基亚大学物理研究所-理学院);Departamento de Física, Universidad Nacional de Colombia(哥伦比亚国立大学物理系);Departamento de Física, Universidad de los Andes(安第斯大学物理系);Observatorio Astronómico, Universidad de los Andes(安第斯大学天文台)
Planck Lensing and Cosmic Infrared Background Cross-Correlation with Fermi-LAT: Tracing Dark Matter Signals in the Gamma-Ray Background
河外$γ$射线背景及其空间各向异性可能包含暗物质(DM)湮灭或粒子衰变的特征。天体物理前景,如耀变体和恒星形成星系(SFG),然而,占主导地位的$γ$射线背景,排除了一个容易检测的信号与DM湮灭或衰减的背景强度谱。在$γ$射线背景上的DM印记预期与大尺度结构示踪剂相关。在某些情况下,这样的互相关甚至被期望具有比自相关更高的信噪比。宇宙微波背景(CMB)透镜效应是大尺度结构DM分布的可靠示踪剂,而宇宙红外背景(CIB)是SFG的可靠示踪剂。我们分析了超过92个月的费米LAT数据,并研究了普朗克CMB透镜,普朗克CIB和费米$γ$地图的交叉相关性。我们把上限的DM湮没截面从交叉功率谱与$γ$射线背景各向异性。无偏功率谱估计验证与仿真,包括互相关信号。我们还提供了一套系统的测试,并表明,没有显着的污染,发现这里提出的测量。使用$γ$ -射线背景图从收集的数据超过92个月,我们找到了最好的约束DM湮灭的$1σ$置信水平上限为$10^{-25}$ - $10^{-24}$ cm $^{3}$ s $^{-1}$,当DM粒子的质量是在20和100 GeV之间。
Backlighting the Cosmic Web with Fast Radio Bursts: An Anthology of Dispersion Measure Cross-Correlations with Large-Scale Structure and Baryon Tracers
California Institute of Technology(加州理工学院);University of Arizona(亚利桑那大学);University of Chicago(芝加哥大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate
Induced Gravitational Waves as Cosmic Tracers of Leptogenesis
Scuola Superiore Meridionale(南方高等学院);INFN - Sezione di Napoli(意大利国家核物理研究所那不勒斯分部);Institute for Theoretical Physics, Leibniz University Hannover(汉诺威莱布尼茨大学理论物理研究所);Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut(马克斯·普朗克引力物理研究所阿尔伯特·爱因斯坦研究所);Department of Physics, University of Patras(帕特雷大学物理系)
Improving baryon acoustic oscillation measurement with the combination of cosmic voids and galaxies
我们开发了一种方法来优化测量的重子声学振荡(BAO)从一个给定的星系样本。在我们以前的工作中,我们证明了可以从低密度区域(空隙)的示踪剂中测量BAO。在这项研究中,我们结合过密和欠密示踪剂(星系和空隙),以获得更好的约束BAO规模。为此,我们修改了去摆动BAO模型与一个额外的参数来描述的BAO峰值和潜在的排斥模式的空隙2PCF。我们表明,应用BAO重建星系后,BAO峰值尺度的星系和空洞是无偏的使用修改后的模型。此外,我们使用一个新的2PCF估计的多示踪剂分析与星系和空隙。在模拟中,联合样本改善了约10%的约束后重建BAO峰值位置相比,从星系单独的结果,这相当于扩大了20%的调查量。将此方法应用于BOSS DR 12数据,我们对低z样本(0.2<z<0.5)有18%的改进,但对高z样本(0.5<z<0.75)有更差的约束,这与当前调查量的统计波动一致。未来更大的样本将提供更强大的改进,由于更少的统计波动。
Detecting the neutrino mass via the cross-correlation between matter tracers and the ISWRS effect?
Università degli Studi di Roma Tor Vergata(罗马第二大学);INFN, Sezione di Roma 2(意大利国家核物理研究所罗马第二分部);Astronomical Observatory of the Autonomous Region of the Aosta Valley (OAVdA)(瓦莱达奥斯塔大区天文台);INAF – Istituto di Astrofisica Spaziale e Fisica cosmica di Milano (IASF-MI)(意大利国家天体物理研究所米兰空间天体物理与宇宙物理研究所)
Constraining the intrinsic population of Long Gamma-Ray Bursts: implications for spectral correlations, cosmic evolution and their use as tracers of star formation
Cosmological exploitation of cosmic void statistics - New numerical tools in the CosmoBolognaLib to extract cosmological constraints from the void size function
Measuring the Angular Auto-power Spectrum of Fast Radio Burst Dispersion Measures as a Robust Cosmological Probe and Baryon Tracer
Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);School of Astronomy and Space Sciences, University of Science and Technology of China(中国科学技术大学天文与空间科学学院)