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arXiv 2607.03312astro-ph.CO
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欧几里得:在欧几里得旗舰模拟中测量宇宙空洞周围星系的内禀对齐

Euclid: Measuring the intrinsic alignment of galaxies around cosmic voids in the \Euclid Flagship simulation\

Aix-Marseille Université(艾克斯-马赛大学);CNRS/IN2P3, CPPM(法国国家科学研究中心/欧洲核子研究组织粒子物理与核物理研究所,普罗旺斯粒子与天体物理中心);Departament de Física, Universitat Autònoma de Barcelona(巴塞罗那自治大学物理系);Instituto de Astronomia Teorica y Experimental (IATE-CONICET)(理论与实验天文研究所);Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology(高能物理研究所,巴塞罗那科学技术学院);LAM(拉格朗日天体物理实验室);MTA-CSFK Lendület Large-Scale Structure Research Group, Konkoly-Thege Miklós út 15-17(匈牙利科学院CSFK Lentület大尺度结构研究组);Konkoly Observatory, HUN-REN CSFK, MTA Centre of Excellence(孔科利天文台);ELTE Eötvös Loránd University, Institute of Physics and Astronomy(罗兰大学物理与天文学研究所)
P. Vielzeuf, M. -C. Cousinou, A. Pisani, S. Escoffier, E. J. Gonzalez, W. d'Assignies, E. Jullo, M. Ghodsi Yengejeh, A. Kovács, S. Andreon, N. Auricchio, C. Bac… 展开作者

P. Vielzeuf, M. -C. Cousinou, A. Pisani, S. Escoffier, E. J. Gonzalez, W. d'Assignies, E. Jullo, M. Ghodsi Yengejeh, A. Kovács, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, S. Bardelli, P. Battaglia, A. Biviano, E. Branchini, M. Brescia, S. Camera, V. Capobianco, C. Carbone, V. F. Cardone, J. Carretero, M. Castellano, G. Castignani, S. Cavuoti, A. Cimatti, C. Colodro-Conde, G. Congedo, L. Conversi, Y. Copin, F. Courbin, H. M. Courtois, H. Degaudenzi, S. de la Torre, G. De Lucia, H. Dole, F. Dubath, X. Dupac, M. Farina, R. Farinelli, S. Farrens, F. Faustini, S. Ferriol, F. Finelli, P. Fosalba, S. Fotopoulou, N. Fourmanoit, M. Frailis, E. Franceschi, M. Fumana, S. Galeotta, K. George, W. Gillard, B. Gillis, C. Giocoli, P. Gómez-Alvarez, J. Gracia-Carpio, A. Grazian, F. Grupp, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, A. Hornstrup, K. Jahnke, M. Jhabvala, B. Joachimi, S. Kermiche, A. Kiessling, M. Kilbinger, B. Kubik, M. Kümmel, M. Kunz, H. Kurki-Suonio, A. M. C. Le Brun, S. Ligori, P. B. Lilje, V. Lindholm, I. Lloro, G. Mainetti, O. Mansutti, O. Marggraf, M. Martinelli, N. Martinet, F. Marulli, R. J. Massey, S. Maurogordato, E. Medinaceli, S. Mei, M. Meneghetti, E. Merlin, G. Meylan, A. Mora, M. Moresco, L. Moscardini, C. Neissner, S. -M. Niemi, J. W. Nightingale, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, V. Pettorino, A. Pezzotta, S. Pires, G. Polenta, L. A. Popa, L. Pozzetti, F. Raison, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, M. Roncarelli, C. Rosset, R. Saglia, Z. Sakr, A. G. Sánchez, D. Sapone, B. Sartoris, P. Schneider, T. Schrabback, A. Secroun, E. Sihvola, P. Simon, C. Sirignano, G. Sirri, A. Spurio Mancini, L. Stanco, P. Tallada-Crespí, A. N. Taylor, H. I. Teplitz, I. Tereno, N. Tessore, S. Toft, R. Toledo-Moreo, F. Torradeflot, I. Tutusaus, J. Valiviita, T. Vassallo, G. Verdoes Kleijn, A. Veropalumbo, Y. Wang, J. Weller, G. Zamorani, F. M. Zerbi, E. Zucca, T. Castro, M. Sereno, M. Viel, D. Navarro-Gironés

AI总结:

该研究利用欧几里得联盟的类欧几里得旗舰宇宙学模拟,给出测量宇宙空洞附近星系内禀对齐(IA)信号的方法,与线性对齐模型预测对比,还估计了空洞线性偏差。

摘要:

我们提出一种方法,使用来自欧几里得联盟的类欧几里得旗舰宇宙学模拟来测量宇宙空洞附近星系的内禀对齐(IA)信号。对IA信号进行量化并与线性对齐(LA)模型的预测进行比较,这是对低密度大尺度环境中这种效应的首次详细研究之一。我们分别检查了红色和蓝色星系群体,能够将它们在空洞环境中的对齐行为与在星系 - 星系相关性中测量的相应趋势进行比较。我们发现,对于两个颜色选择的样本,宇宙空洞中IA振幅的红移演化与在一般星系群体中测量的大致一致。此外,我们的建模使我们能够估计半径在10 < RV /(h-1 Mpc)< 15范围内的空洞的线性偏差bV(z),它表征了宇宙空洞如何追踪潜在的暗物质密度场。测量的偏差呈现出随红移的正趋势,这与低密度区域聚类的理论预测一致。这些结果强调了在空洞研究中准确建模IA的重要性,这对于减轻空洞透镜宇宙学中的系统效应以及进一步提高我们对宇宙低密度区域中星系 - 环境相互作用的理解都很重要。

英文摘要:

We present a methodology to measure the intrinsic alignment (IA) signal of galaxies in the vicinity of cosmic voids using the \Euclid-like Flagship cosmological simulation from the Euclid Consortium. The IA signal is quantified and compared with the predictions of the linear alignment (LA) model, providing one of the first detailed investigations of this effect in underdense large-scale environments. While the IA signal around cosmic voids has received little attention to date, it may constitute a non-negligible systematic in forthcoming cosmological analyses that exploit void-lensing measurements. Our analysis examines red and blue galaxy populations separately, enabling a comparison of their alignment behaviour in void environments with the corresponding trends measured in galaxy-galaxy correlations. We find that the redshift evolution of the IA amplitude in cosmic voids is broadly consistent with that measured in the general galaxy population for both colour-selected samples. Additionally, our modelling allows us to estimate the linear bias of voids, $b_{\rm V}(z)$ which characterises how cosmic voids trace the underlying dark-matter density field, for voids with radii in the range $10 < R_{\rm V}/(h^{-1} {\rm Mpc}) < 15$. The measured bias exhibits a positive trend with redshift, consistent with theoretical predictions for the clustering of underdense regions. These results highlight the importance of accurately modelling IA in void studies, both to mitigate systematic effects in void-lensing cosmology and to further improve our understanding of galaxy-environment interactions in low-density regions of the Universe.

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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