𝗓=2-3时莱曼阿尔法发射星系的聚类现象

IF 5.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-08-12 DOI:10.1088/1475-7516/2024/08/020

Martin White, A. Raichoor, Arjun Dey, Lehman H. Garrison, Eric Gawiser, D. Lang, Kyoung-soo Lee, A.D. Myers, D. Schlegel, F. Valdes, J. Aguilar, S. Ahlen, D. Brooks, E. Chaussidon, T. Claybaugh, K. Dawson, A. de la Macorra, Biprateep Dey, P. Doel, K. Fanning, A. Font-Ribera, J.E. Forero-Romero, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, K. Honscheid, D. Kirkby, A. Kremin, M. Landriau, L. Le Guillou, M.E. Levi, C. Magneville, M. Manera, P. Martini, A. Meisner, R. Miquel, B. Moon, J.A. Newman, G. Niz, N. Palanque-Delabrouille, C. Park, W.J. Percival, F. Prada, G. Rossi, V. Ruhlmann-Kleider, E. Sanchez, E.F. Schlafly, M. Schubnell, H. Seo, D. Sprayberry, G. Tarlé, B.A. Weaver, Y. Yang, C. Yèche and H. Zou

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引用次数: 0

摘要

我们测量了从一百平方度 DECam 窄波段成像（ODIN）巡天中选出的莱曼阿尔法发射星系（LAE）的聚类，并利用暗能量光谱仪（DESI）进行了光谱跟踪。我们利用 DESI 光谱来优化我们的选择，并对窄波段所选源的互扰分数和红移分布进行约束。我们选择了 z = 2.45 和 3.1 的 4000 个 LAEs 样本，它们位于以 COSMOS 星场为中心的 9 平方度范围内，Lyα 通量中位数≈ 10-16 erg s-1 cm-2。我们从一系列模拟星表中获得了协方差和宇宙学推论，这些模拟星表建立在高分辨率的 N-体模拟基础上，与样本的足迹、数量密度、红移分布和观测到的聚类相匹配。我们发现这两个样本的相关长度都是 r0 = 3.0 ± 0.2 h-1 Mpc。根据我们的模拟星表，在 z = 2.45 和 3.1 时的三维数量密度分别为 1.7 和 2.0。我们将讨论这些测量结果对使用LAEs作为高红移宇宙学的大尺度结构追踪器的影响。

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The clustering of Lyman Alpha Emitting galaxies at 𝗓=2–3

We measure the clustering of Lyman Alpha Emitting galaxies (LAEs) selected from the One-hundred-square-degree DECam Imaging in Narrowbands (ODIN) survey, with spectroscopic follow-up from Dark Energy Spectroscopic Instrument (DESI). We use DESI spectroscopy to optimize our selection and to constrain the interloper fraction and redshift distribution of our narrow-band selected sources. We select samples of 4000 LAEs at z = 2.45 and 3.1 in 9 sq.deg. centered on the COSMOS field with median Lyα fluxes of ≈ 10-16 erg s-1 cm-2. Covariances and cosmological inferences are obtained from a series of mock catalogs built upon high-resolution N-body simulations that match the footprint, number density, redshift distribution and observed clustering of the sample. We find that both samples have a correlation length of r0 = 3.0 ± 0.2 h-1 Mpc. Within our fiducial cosmology these correspond to 3D number densities of ≈ 10-3 h3 Mpc-3 and, from our mock catalogs, biases of 1.7 and 2.0 at z = 2.45 and 3.1, respectively. We discuss the implications of these measurements for the use of LAEs as large-scale structure tracers for high-redshift cosmology.

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.