FOREVER22: galaxy formation in protocluster regions
FOREVER22: galaxy formation in protocluster regions
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FOREVER22：原星系团区域的星系形成
DOI：
10.1093/mnras/stab3092
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发表时间：
2021
影响因子：
4.8
通讯作者：
Umehata Hideki
中科院分区：
文献类型：
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作者：
Yajima Hidenobu;Abe Makito;Khochfar Sadegh;Nagamine Kentaro;Inoue Akio K;Kodama Tadayuki;Arata Shohei;Dalla-Vecchia Claudio;Fukushima Hajime;Hashimoto Takuya;Kashikawa Nobunari;Kubo Mariko;Li Yuexing;Matsuda Yuichi;Mawatari Ken;Ouchi Masami;Umehata Hideki
我们介绍了一项新的原星系团(PC)区宇宙流体动力学模拟活动FOREVER22的结果：由SSA22激发的极高密度区星系的形成和演化。使用三种不同的变焦设置在母体体积中使用三种不同的宇宙尺度：PCr(原星系区；V=(28.6cmPC)3，SPH粒子质量，MSPH=4.1x×106m⊙，以及最终红移，Zend=2.0)，BCG(最亮的原星系团；V∼(10cmPC)3，MSPH=5.0x×105m⊙和ZEnd=4.0)和第一次(V∼(3cmpc)3，MSPH=7.9×10~3m⊙和ZEnd=9.5)运行，使我们能够专注于星系形成的不同方面。在PCR运行中，我们跟踪了10台PC，每台PC含有1-4个SMBH。其中一个PC核心显示了七个星爆星系在空间上的紧密排列，每个星系都被尘埃遮盖住了，看起来像是流量为≳1的亚毫米星系。第一次运行解析了小型晕托管(POP)III恒星，我们发现，在PC区，主要的恒星群从POP III转变为POP II(在≲≳20)，并且第一批星系形成于ATZ∼10。这些星系可能是詹姆斯·韦伯太空望远镜未来观测的主要目标。我们的模拟成功地再现了观测到的PC中的全球恒星形成活动，并表明PC可以启动宇宙再电离。
We present results from a new cosmological hydrodynamics simulation campaign of protocluster (PC) regions, FOREVER22: FORmation and EVolution of galaxies in Extremely overdense Regions motivated by SSA22. The simulations cover a wide range of cosmological scales using three different zoom set-ups in a parent volume of: PCR (Proto-Cluster Region;V= (28.6 cMpc)3, SPH particle mass,mSPH= 4.1 × 106M⊙, and final redshift,zend= 2.0), BCG (Brightest proto-Cluster Galaxy;V∼ (10 cMpc)3,mSPH= 5.0 × 105M⊙andzend= 4.0), and First (V∼ (3 cMpc)3,mSPH= 7.9 × 103M⊙andzend= 9.5) runs, that allow us to focus on different aspects of galaxy formation. In the PCR runs, we follow 10 PCs, each harbouring 1–4 SMBHs with. One of the PC cores shows a spatially close arrangement of seven starburst galaxies witheach, that are dust-obscured and would appear as submillimetre galaxies with flux ≳1 mJy atin observations. The BCG runs show that the total SFRs of haloes hosting BCGs are affected by AGN feedback, but exceedatz≲ 6. The First runs resolve mini-haloes hosting population (Pop) III stars and we show that, in PC regions, the dominant stellar population changes from Pop III to Pop II atz≳ 20, and the first galaxies withform atz∼ 10. These can be prime targets for future observations with theJames Webb Space Telescope. Our simulations successfully reproduce the global star formation activities in observed PCs and suggest that PCs can kickstart cosmic reionization.