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arXiv 1801.02689astro-ph.CO
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SDSS-IV扩展重子振荡谱学巡天DR14类星体样品的成团:从红移范围$0.8<z<2.2$的各向异性类星体功率谱测量结构增长率

The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: structure growth rate measurement from the anisotropic quasar power spectrum in the redshift range $0.8<z<2.2$

Héctor Gil-Marín, Julien Guy, Pauline Zarrouk, Etienne Burtin, Chia-Hsun Chuang, Will J. Percival, Ashley J. Ross, Rossana Ruggeri, Rita Tojerio, Gong-Bo Zhao, … 展开作者

Héctor Gil-Marín, Julien Guy, Pauline Zarrouk, Etienne Burtin, Chia-Hsun Chuang, Will J. Percival, Ashley J. Ross, Rossana Ruggeri, Rita Tojerio, Gong-Bo Zhao, Yuting Wang, Julian Bautista, Jiamin Hou, Ariel G. Sánchez, Isabelle Pâris, Falk Baumgarten, Joel R. Brownstein, Kyle S. Dawson, Sarah Eftekharzadeh, Violeta González-Pérez, Salman Habib, Katrin Heitmann, Adam D. Myers, Graziano Rossi, Donald P. Schneider, Jeremy L. Tinker, Cheng Zhao

摘要:

本文分析了斯隆数字巡天IV扩展重子振荡光谱巡天数据Release 14类星体样本(DR 14 Q)的聚类情况。我们测量的红移空间失真使用的功率谱的148,659类星体之间的红移0.8和2.2覆盖的总天空足迹2112.9度$^2$推断四极和十六极。我们约束的对数增长的结构倍的暗物质密度波动的幅度,$fσ_8$,和Alcock-Paczynski膨胀尺度,允许约束放置在角直径距离$D_A(z)$和哈勃$H(z)$参数。在$z_{\rm eff}=1.52$、$fσ_8(z_{\rm eff})=0.420\pm0.076$、$H(z_{\rm eff})=[162\pm 12]\, (r_s^{\rm fid}/r_s)\,{\rm km\, s}^{-1}{\rm Mpc}^{-1}$和$D_A(z_{\rm eff})=[1.85\pm 0.11]\times10^3\,(r_s/r_s^{\rm fid})\,{\rm Mpc}$的有效红移处,其中$r_s$是重子拖曳历元处的共动声视界,上标“”表示其基准值。这些误差考虑到了全部误差预算,包括系统和统计方面的贡献。这些结果完全符合目前的$Λ$ -冷暗物质($Λ$ CDM)宇宙学模型从普朗克测量推断。最后,我们将我们的测量结果与其他eBOSS同伴论文进行了比较,发现非常一致,证明了用于分析数据的不同方法的一致性和互补性。

英文摘要:

We analyse the clustering of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey Data Release 14 quasar sample (DR14Q). We measure the redshift space distortions using the power spectrum monopole, quadrupole and hexadecapole inferred from 148,659 quasars between redshifts 0.8 and 2.2 covering a total sky footprint of 2112.9 deg$^2$. We constrain the logarithmic growth of structure times the amplitude of dark matter density fluctuations, $fσ_8$, and the Alcock-Paczynski dilation scales which allow constraints to be placed on the angular diameter distance $D_A(z)$ and the Hubble $H(z)$ parameter. At the effective redshift of $z_{\rm eff}=1.52$, $fσ_8(z_{\rm eff})=0.420\pm0.076$, $H(z_{\rm eff})=[162\pm 12]\, (r_s^{\rm fid}/r_s)\,{\rm km\, s}^{-1}{\rm Mpc}^{-1}$, and $D_A(z_{\rm eff})=[1.85\pm 0.11]\times10^3\,(r_s/r_s^{\rm fid})\,{\rm Mpc}$, where $r_s$ is the comoving sound horizon at the baryon drag epoch and the superscript `fid' stands for its fiducial value. The errors take into account the full error budget, including systematics and statistical contributions. These results are in full agreement with the current $Λ$-Cold Dark Matter ($Λ$CDM) cosmological model inferred from Planck measurements. Finally, we compare our measurements with other eBOSS companion papers and find excellent agreement, demonstrating the consistency and complementarity of the different methods used for analysing the data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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