Probing the evolution of the universe at high redshifts with standard candles is a powerful way to discriminate dark energy models, where an open question nowadays is whether this component is constant or evolves with time. One possible source of ambiguity in this kind of analyses comes from cosmic opacity, which can mimick a dark enery behaviour. However, most tests of cosmic opacity have been restricted to the redshift range $z<2$. In this work, by using luminosity distances of gamma-ray bursts (GRBs), {given the validity of the Amati relation}, and the latest $H(z)$ data we determine constraints on the cosmic opacity at high redshifts ($z>2$) for a flat $Λ$CDM model. A possible degenerescence of the results with the adopted cosmological model is also investigated by considering a flat XCDM model. The limits on cosmic opacity in the redshift range $0<z<2$ are updated with type Ia supernovae (SNe Ia) from the Union2.1 sample, where we added the most distant ($z=1.713$) spectroscopically confirmed SNe Ia. From the analyses performed, we find that both SNe Ia and GRBs samples are compatible with a transparent universe at $1σ$ level and the results are independent of the dark energy equation of state parameter $w$.
Probing the baryon mass fraction in IGM and its redshift evolution with fast radio bursts using Bayesian inference method
利用红移范围$f_\mathrm{IGM}$内的18个定域FRB研究了星系际介质中重子质量分数。我们构造了一个五参数的贝叶斯推断模型,适当地考虑了IGM和宿主星系色散测度的概率分布。为了检验可能的红移演化,我们将$f_\mathrm{IGM}$参数化为红移的温和演化函数$f_\mathrm{IGM}=f_\mathrm{IGM,0}[1+αz/(1+z)]$。通过同时约束5个参数,得到了主星系DM的中值为$\exp(μ)=72.49^{+33.31}_{-25.62}~{\rm pc ~ cm ^ {-3}}$的$f_\mathrm{IGM,0} = 0.92^{+0.06}_{-0.12}$和$α= 0.49^{+0.59}_{-0.47}$。通过固定两个可以与其他观测值独立约束的参数,我们得到了三参数拟合中的$α=0.11^{+0.24}_{-0.27}$,它在$1σ$不确定度范围内与零一致。蒙特卡罗模拟表明,即使300个FRB也不足以同时严格约束五个参数。这主要是由参数之间的相关性造成的。只有当两个参数固定时,才需要100个FRB来实现对其余参数的无偏约束。
Probing the Bias of Large-Scale Structure with Unlocalized Fast Radio Bursts
School of Physics and Astronomy, Beijing Normal University(北京师范大学物理与天文学院);Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University(北京师范大学前沿天体物理研究所)
X-ray surface brightness observations of galaxy clusters, cosmic opacity and the limits on the matter density parameter
在这项工作中,我们使用两个气体质量分数的星系团的X射线表面亮度的观测,结合最近的$H(z)$数据在一个平坦的$Λ$ CDM框架施加限制宇宙不透明度。假设星系团处于流体静力平衡状态,气体质量分数测量值随红移保持不变。我们表明,目前的限制物质密度参数得到的X射线气体质量分数测试是强烈依赖于宇宙透明性假设,即使是一个平坦的场景。我们的结果与$1σ$ c. l.中的透明宇宙一致。与使用Ia型超新星、伽马射线暴和$H(z)$数据的其他分析完全一致。
Probing Collapsed Dark Matter Halos with Fast Radio Bursts
City University of Hong Kong(香港城市大学);University of Chinese Academy of Sciences(中国科学院大学);Tongji University(同济大学);The Hong Kong University of Science and Technology(香港科技大学)
Probing Pre-galactic Metal Enrichment with High-Redshift Gamma-Ray Bursts
我们探讨高红移伽马射线暴(GRB)作为有前途的工具,探测前银河系金属富集。利用原始矮星系中爆发的Pop III GRB的明亮余辉作为发光背景源,计算了星系际介质(IGM)中第一重元素留下的金属吸收线的强度。为了得到伽玛射线暴吸收线的诊断,我们使用了一个现有的高分辨率模拟的第一个星系的形成,其特征是在一个维里温度>10^4 K的晕中氢原子冷却的开始。我们探索不寻常的环爆环境内的系统,举办流行III星,模拟密度演化与自相似的解决方案的香槟流。对于接近冷却阈值的微晕,环爆流密度大致与(1+z)成正比,其值约为几cm^{-3}。在质量更大的晕中,对应于第一个星系,密度可能更大,n>100 cm^{-3}。由此产生的余辉通量可以分别在近红外和无线电波段用JWST和VLA检测到,直到红移z>20。我们预测,余辉发射的最大值从近红外到毫米波段移动,峰值通量从mJy到Jy在不同的观测时间。伽玛暴具有高亮度和无特征的幂律谱,是探测IGM早期金属富集的理想工具。由第一颗超新星(SN)爆炸产生的第一个星系中的金属可能处于低电离阶段。我们表明,如果余辉可以观察到足够早,分析的金属线可以区分是否产生的第一个重元素的PISN,或核心塌陷(II型)SN,从而约束的初始质量函数的第一个恒星。
The Optically Unbiased Gamma-Ray Burst Host (TOUGH) Survey. VII. The Host Galaxy Luminosity Function: Probing the Relationship Between GRBs and Star Formation to Redshift $\sim6$
Probing Cosmic Curvature with Fast Radio Bursts and DESI DR2
Universidade Federal do Espírito Santo (UFES)(埃斯皮里托圣托联邦大学);Instituto Argentino de Radioastronomía(阿根廷射电天文研究所);University of Cape Town(开普敦大学);Universidad Nacional de La Plata(拉普拉塔国立大学)
Probing Evolution of Long Gamma-Ray Burst Properties through Their Cosmic Formation History
Clemson University(克莱姆森大学);National Astronomical Observatory of Japan(日本国立天文台);The Graduate University for Advanced Studies, SOKENDAI(综合研究大学院大学);Space Science Institute(空间科学研究所);University of Nevada, Las Vegas(内华达大学拉斯维加斯分校);Bay Environmental Institute(湾环境研究所);Jagiellonian University(雅盖隆大学);Astronomical Observatory of Jagiellonian University(雅盖隆大学天文台)
Probing the Cosmic Baryon Distribution and the Impact of Active Galactic Nuclei Feedback with Fast Radio Bursts in CROCODILE Simulation
The University of Osaka(大阪大学);The University of Tokyo(东京大学);University of Nevada, Las Vegas(内华达大学拉斯维加斯分校);Zhejiang University(浙江大学);Seoul National University(首尔大学)
Probing the Cosmic Web with Fast Radio Bursts. I. Scattering
Racah Institute of Physics, The Hebrew University(拉卡物理研究所,希伯来大学);Astrophysics Research Center of the Open University (ARCO), The Open University of Israel(开放大学天体物理研究中心(ARCO),以色列开放大学);Department of Natural Sciences, The Open University of Israel(自然科学系,以色列开放大学);Department of Physics, The George Washington University(物理系,乔治华盛顿大学);Department of Physics, University of California, Santa Barbara(物理系,加州大学圣塔芭芭拉分校)
Probing the Baryon Distribution with Fast Radio Bursts
The University of Sydney(悉尼大学);University of Cape Town(开普敦大学);African Institute for Mathematical Sciences(非洲数学科学研究所);Curtin University(科廷大学);Swinburne University of Technology(斯威本科技大学);ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav)(引力波发现卓越研究中心 (OzGrav));Stanford University(斯坦福大学);Trinity College Dublin(都柏林三一学院);Stellenbosch University(斯坦陵布什大学);Aix-Marseille University(艾克斯-马赛大学);Australian National University(澳大利亚国立大学);Indian Institute of Technology, Indore(印度理工学院印多尔分校);Chinese Academy of Sciences(中国科学院);University of Chinese Academy of Sciences(中国科学院大学)
Probing the cosmic web with fast radio bursts: II. Scintillation
Racah Institute of Physics, The Hebrew University(拉卡物理研究所,希伯来大学);University of Washington, Department of Astronomy(华盛顿大学天文学系);Astrophysics Research Center of the Open University (ARCO), The Open University of Israel(开放大学天体物理学研究中心(ARCO),以色列开放大学);Department of Natural Sciences, The Open University of Israel(自然科学与系,以色列开放大学);Department of Physics, The George Washington University(乔治华盛顿大学物理系);Department of Physics, University of California, Santa Barbara(加州大学圣塔芭芭拉分校物理系)
Standardizing Platinum Dainotti-correlated gamma-ray bursts, and using them with standardized Amati-correlated gamma-ray bursts to constrain cosmological model parameters