We measure the transverse baryon acoustic oscillations (BAO) signal in the local Universe using a sample of blue galaxies from the Sloan Digital Sky Survey (SDSS) survey as a cosmological tracer. The method is weakly dependent on a cosmological model and is suitable for 2D analyses in thin redshift bins to investigate the SDSS data in the interval $z {\in} [0.105, 0.115]$. We detect the transverse BAO signal $θ_{BAO} = 19.8^° {\pm} 1.05^°$ at $z_{eff} = 0.11$, with a statistical significance of $2.2 σ$. Additionally, we perform tests that confirm the robustness of this angular BAO signature. Supported by a large set of log-normal simulations, our error analyses include statistical and systematic contributions. In addition, considering the sound horizon scale calculated by the Planck Collaboration, $r_{s}^{Planck}$, and the $θ_{BAO}$ value obtained here, we obtain a measurement of the angular diameter distance $D_{A}(0.11) = 258.31 {\pm} 13.71 \,Mpc/h$. Moreover, combining this $θ_{BAO}$ measurement at low redshift with other BAO angular scale data reported in the literature, we perform statistical analyses for the cosmological parameters of some Lambda cold dark matter ($Λ$CDM) type models.
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from multi-tracer BAO analysis with galaxies and voids
我们使用DIVE void finder在SDSS BOSS DR 12和eBOSS DR 16星系样本上构建了宇宙空洞目录,并应用BAO重建,并使用不同类型的星系和相应的空洞进行联合BAO分析。BAO峰值对于所有数据集的星系-星系、星系-空洞和空洞-空洞关联函数都是明显的,包括那些互相关联的亮红色星系和发射线星系样本。两个多示踪剂BAO拟合方案,然后测试,一个结合的星系和空关联函数的权重适用于空隙,和其他使用一个单一的BAO膨胀参数的所有聚类测量不同的示踪剂。这两种方法产生一致的结果与模拟目录,平均约10%的改善的BAO统计不确定性观察到的所有样本相比,从星系单独的结果。通过结合星系和空洞的聚类,SDSS数据中BAO测量的不确定性降低了5%至15%,在有效红移分别为0.38、0.51、0.70、0.77和0.85时,距离$D_{_{\rm V}}(z)$的约束分别为0.9%、0.8%、1.1%、2.3%和2.9%。当与来自SDSS MGS、类星体和Ly $α$样本的BAO测量以及BBN结果相结合时,我们在平坦的$Λ$ CDM框架中获得了$H_0 = 67.58 \pm 0.91\,{\rm km}\,{\rm s}^{-1}\,{\rm Mpc}^{-1}$、$Ω_{\rm m} = 0.290 \pm 0.015$和$Ω_Λh^2 = 0.3241 \pm 0.0079$,其中…
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: tomographic BAO analysis of DR12 combined sample in Fourier space
Present Day Cosmic Acceleration from SDSS and DESI BAO: A Call for Finer Tomography of the DESI Bright Galaxy Survey
Physics Department and INFN, Università di Roma “La Sapienza”(罗马大学物理系和意大利国家核物理研究所);Departamento de Física Fundamental and IUFFyM, Universidad de Salamanca(萨拉曼卡大学基础物理系和统一场与量子物质研究院)
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: tomographic BAO analysis of DR12 combined sample in configuration space
我们使用从BOSS DR 12的组合样本测量的两点星系相关函数进行层析重子声振荡分析,该组合样本覆盖了$0.2<z<0.75$的红移范围。将样本分成多个重叠的红移切片,提取星系团的红移信息,利用MultiDark-Patchy模拟星表校准的全协方差矩阵,得到了$D_A(z)/r_d$和$H(z)r_d$在9个有效红移处的测量结果。利用重建的星系星表,我们得到了$1.3\%-2.2\%$对$D_A(z)/r_d$和$2.1\%-6.0\%$对$H(z)r_d$的精度。为了量化从断层信息的增益,我们比较宇宙学参数的约束,使用我们的9-bin BAO测量,共识3-bin BAO和RSD测量在三个有效的红移在\citet{Alam2016},和非断层(1-bin)BAO测量在一个单一的有效红移。将9-bin约束结果与1-bin约束结果进行比较,发现对于状态方程参数$w_{\rm DE}$的Chevallier-Polarski-Linder参数化,可以将暗能量品质因数提高1.24倍。与3-bin约束结果相比,来自9-bin约束的$w_0$和$w_a$的误差略有改善。
High-redshift transverse BAO measurements with the SDSS quasar catalog
Observatório Nacional(国家天文台);University of Trento(特伦托大学);Trento Institute for Fundamental Physics and Applications (TIFPA)-INFN(特伦托基础物理与应用研究所(TIFPA)-意大利国家核物理研究所);Universidade Federal do Rio Grande do Sul(南里奥格兰德联邦大学);Instituto Nacional de Pesquisas Espaciais(巴西国家空间研究院)
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: Anisotropic Baryon Acoustic Oscillations measurements in Fourier-space with optimal redshift weights
利用扩展的重子振荡光谱巡天数据Release 14类星体样品,测量了具有最佳红移权的各向异性和各向同性的重子声学振荡(BAO)。应用红移权重将对BAO膨胀参数$α(z_{\rm eff})$的约束提高了17\ %。我们重建了$0.8<z<2.2$红移范围内BAO距离指标的演化历史。本文是分析eBOSS DR 14类星体样本的一组中的一部分。
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey quasar sample: Testing observational systematics on the Baryon Acoustic Oscillation measurement
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogues and Measurement of the isotropic BAO between redshift 0.6 and 1.1 for the Emission Line Galaxy Sample
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: BAO measurement from the LOS-dependent power spectrum of DR12 BOSS galaxies
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: theoretical systematics and Baryon Acoustic Oscillations in the galaxy correlation function
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Effect of smoothing of density field on reconstruction and anisotropic BAO analysis
Smoothing the redshift distributions of random samples for the baryon acoustic oscillations : applications to the SDSS-III BOSS DR12 and QPM mock samples
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the Quasar Sample in configuration space between redshift 0.8 and 2.2
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: a tomographic measurement of structure growth and expansion rate from anisotropic galaxy clustering in Fourier space
Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the $w_0w_a$CDM framework
School of Physics and Astronomy, Sun Yat-Sen University(中山大学物理与天文学院);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);Plaksha University(普拉克斯哈大学);College of Astronomy and Space Sciences, University of Chinese Academy of Sciences(中国科学院大学天文学与空间科学学院);Graduate Program in Applied Physics, Federal University of Latin-American Integration(拉丁美洲联邦大学应用物理研究生项目);Departamento de Engenharias e Ciências Exatas, Universidade Federal do Paraná(巴拉那联邦大学工程与自然科学系);Department of Physics, Istanbul Technical University(伊斯坦布尔理工大学物理系)
本文通过结合CMB各向异性、DESI DR2、SDSS-IV、横向/角BAO(BAOtr)和Ia型超新星数据,测试$w_0w_a$CDM(CPL)框架与$Λ$CDM的差异,发现CPL推断依赖于数据集,CMB数据单独使用存在几何退化,而DESI DR2 BAO数据推动重建向弱现今加速发展,相比之下,CMB结合PP\&SH0ES和BAOtr更倾向于中等加速膨胀并显著减少哈勃矛盾。这种行为源于低红移距离信息:BAOtr和DESI/SDSS在$z\lesssim0.5$时偏好不同的BAO距离比,驱动了不同的CPL膨胀历史。通过比较角BAO尺度,包括共同的$z=0.510$点和保守的BAOtr局部插值(无外推),量化了这种不匹配。在CPL中,预重组物理固定,$r_{ m d}$几乎不变,因此$H_0$的变化被晚期膨胀自由度吸收而非声学 horizon的变化。贝叶斯证据同样依赖于低红移数据:当PP\&SH0ES和/或BAOtr包含时,它倾向于CPL,对于CMB单独或CMB+DESI是不确定的,而对于CMB+SDSS则略微倾向于$Λ$CDM。这些结果表明,CPL的明显支持及其缓解哈勃矛盾的能力并非普遍,这促使了更灵活的晚期模型和对BAO系统误差的更仔细审查。
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic power spectrum between redshifts 0.6 and 1.0
Detection significance of Baryon Acoustic Oscillations peaks in galaxy and quasar clustering
我们比较我们的分析的重子声学振荡(BAO)功能的相关函数的SDSS BOSS DR 12 LOWZ和CMASS星系样本的arXiv:1509.06371 v2的结果。使用数据的子集,我们获得了相关函数的误差的经验估计,这与arXiv:1509.06371v2的模拟误差一致。我们发现,BAO检测的显著性是对拟合范围的选择最敏感的量,随着拟合范围的减小,CMASS值从$8.0σ$减小到$5.3σ$。尽管我们对$D_V(z)$的测量结果与arXiv:1509.06371 v2的测量结果一致,但我们注意到它们的CMASS $8.0σ$(LOWZ $4.0σ$)检测显著性仅在与对角协方差项拟合时降低至$4.7σ$($2.8σ$)。我们通过拟合2QDESp,SDSS DR5 EQUORM,2QZ和2SLAQ类星体相关函数的加权平均值,将我们的BAO分析扩展到更高的红移,与eBOSS DR 14实现的$3.9\%$相比,获得了$7.6\%$测量。与LRG调查不同,类星体相关函数的较大误差意味着滋扰参数(占尺度依赖的聚类)在提供良好的拟合基准$Λ$ CDM模型中的作用较小。再次仅使用arXiv:1705.06373 v2的误差条并忽略任何非对角协方差矩阵项,我们发现eBOSS峰值显著性从2.8降低到$1.4σ$。我们的结论是,对于LRG和类星体,报告的BAO峰值的意义,从SDSS调查敏感地依赖于在…
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights
提出了一种基于最优红移加权方案的新方法,从扩展重子振荡谱巡天(eBOSS)数据释放14类星体(DR14Q)巡天中提取重子声振荡(BAO)和红移空间畸变(RSD)的最大层析信息.我们使用EZ模拟验证了我们的方法,并将我们的流水线应用于红移范围为$0.8<z<2.2$的eBOSS DR 14 Q样品。我们报告了在四个有效红移$z_{\rm eff}=0.98, 1.23, 1.52$和$1.94$上对$fσ_8$和二维BAO参数$D_{\rm A}$和$H$的联合测量,并提供了完整的数据协方差矩阵。使用我们的测量结合BOSS DR 12,MGS和6dFGS BAO测量,我们发现暗能量的存在是由观测支持在$7.4σ$显着性水平。结合我们的测量与BOSS DR 12和普朗克观测,我们约束的引力增长指数为$γ=0.580\pm0.082$,这是完全符合广义相对论的预测。本文是分析eBOSS DR 14类星体样本的一组中的一部分。
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
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the Quasar sample between redshift 0.8 and 2.2
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Observational systematics and baryon acoustic oscillations in the correlation function
我们提出了重子声学振荡(BAO)尺度的测量确定的120万个大质量星系的红移0.2 < z < 0.75分布在9300平方度的集群,量化的红移空间关联函数。为了方便这些测量,我们定义,描述,并激励选择功能的SDSS III重子振荡光谱巡天(BOSS)的最终数据发布(DR 12)的星系。这包括观测足迹,图像质量和银河系消光的掩模,以及考虑调查成像和光谱部分固有的密度关系的权重。我们模拟了模拟星系样本中观察到的系统趋势,并证明它们对重子声学振荡(BAO)尺度测量没有影响,并且对恢复的统计不确定性有轻微的影响。我们在0.2 < z < 0.5,0.5 < z < 0.75和(重叠)0.4 < z < 0.6红移箱中测量横向和径向BAO距离测量。在每个红移箱,我们得到的精度是2.7%或更好的径向距离和1.6%或更好的横向距离。红移仓的组合表示径向距离的1.8%精度和横向距离的1.1%精度。本文是分析BOSS最终星系聚类数据集的一部分。这里提出的测量和可能性与Alam et al.(2016)中的其他测量和可能性相结合,以产生BOSS的最终宇宙学约束。
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the emission line galaxy sample from the anisotropic power spectrum between redshift 0.6 and 1.1