The Uchuu-universe machine data set: galaxies in and around clusters
The Uchuu-universe machine data set: galaxies in and around clusters
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Uchuu 宇宙机器数据集：星团内及其周围的星系
DOI：
10.1093/mnras/stac3514
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发表时间：
2022
影响因子：
4.8
通讯作者：
Ruedas Jose
中科院分区：
文献类型：
--
作者：
Aung Han;Nagai Daisuke;Klypin Anatoly;Behroozi Peter;Abdullah Mohamed H;Ishiyama Tomoaki;Prada Francisco;Perez Enrique;Lopez Cacheiro Javier;Ruedas Jose
本文介绍了Uchuu-UM星系星表的公开数据发布，在UchuU-Body宇宙学模拟中，我们应用宇宙机算法将星系分配给暗物质晕。它包括了所有星系的各种重子性质，范围从∼5×108m⊙到晕质量范围为1010<；Mhalo/M⊙<；5×1015直到红移=10。Uchuu-UM包括超过104个星系团大小的晕，体积为8(h−1Gpc)3，在Z=0−7的红移范围内再现了观测到的恒星质量函数，星系猝灭的部分，以及低红移的星团统计数据。与之前最大的UM星表相比，Uchuu-UM星表包括了更多由大质量暗物质晕托管的大质量星系。总体而言，暗物质晕中星系的数密度分布遵循暗物质分布，在溅射半径附近轮廓变得更陡峭，在更大半径处变平。恒星质量越大，星系的数密度分布往往越陡峭，这取决于星系的颜色，红色星系在所有半径处的坡度都比蓝色星系更陡峭。猝灭分数对恒星质量表现出强烈的依赖性，并向团簇的内部区域增加。这里给出的公开可用的Uchuu-UM星系星表可以用来模拟正在进行和即将进行的大型星系调查。
We present the public data release of the Uchuu-UM galaxy catalogues by applying theUniverseMachinealgorithm to assign galaxies to the dark matter haloes in the UchuuN-body cosmological simulation. It includes a variety of baryonic properties for all galaxies down to ∼5 × 108M⊙with haloes in a mass range of 1010<Mhalo/M⊙< 5 × 1015up to redshiftz= 10. Uchuu-UM includes more than 104cluster-size haloes in a volume of 8(h−1Gpc)3, reproducing observed stellar mass functions across the redshift range ofz= 0−7, galaxy quenched fractions, and clustering statistics at low redshifts. Compared to the previous largest UM catalogue, the Uchuu-UM catalogue includes significantly more massive galaxies hosted by large-mass dark matter haloes. Overall, the number density profile of galaxies in dark matter haloes follows the dark matter profile, with the profile becoming steeper around the splashback radius and flattening at larger radii. The number density profile of galaxies tends to be steeper for larger stellar masses and depends on the colour of galaxies, with red galaxies having steeper slopes at all radii than blue galaxies. The quenched fraction exhibits a strong dependence on the stellar mass and increases towards the inner regions of clusters. The publicly available Uchuu-UM galaxy catalogue presented here can serve to model ongoing and upcoming large galaxy surveys.