论文标题
在宇宙纸上淬灭：追踪大规模结构崩溃对矮星系演变的影响
Quenching in Cosmic Sheets: Tracing the Impact of Large Scale Structure Collapse on the Evolution of Dwarf Galaxies
论文作者
论文摘要
矮星系被认为是主要是由于环境过程最常发生在星系组和簇中或周围的单个大型星系。但是，在较早的时期（$ 5 <z <2 $）上，大规模结构的崩溃（形成Zel'Dovich板和随后的宇宙网络的细丝）可以在这些热点（$ t> 10^6 $ k）阶段中产生填充量的吸积冲击，从而提高这些结构（Igm）的大量大块（Igm）。我们使用空间上大，高分辨率的宇宙学变焦模拟模拟了这种事件对中央矮星系（$ 5.5 <\ log M_* <8.5 $）的影响的影响，该模拟涵盖了两个原始群体之间的宇宙网络环境。我们发现，冲击加热的薄板充当环境淬火器，就像较低的红移一样，像群集和细丝一样，形成了一系列淬火的中央矮星系。即使是不淬火的大量矮人也会受到冲击的影响，减少了SSFR和气体积聚。这个过程可能可以解释孤立的猝灭矮星系的存在，并代表了预处理的途径，通过该途径，在该过程中淬灭已结合的系统淬灭的卫星淬灭。
Dwarf galaxies are thought to quench primarily due to environmental processes most typically occurring in galaxy groups and clusters or around single, massive galaxies. However, at earlier epochs, ($5 < z < 2$), the collapse of large scale structure (forming Zel'dovich sheets and subsequently filaments of the cosmic web) can produce volume-filling accretion shocks which elevate large swaths of the intergalactic medium (IGM) in these structures to a hot ($T>10^6$ K) phase. We study the impact of such an event on the evolution of central dwarf galaxies ($5.5 < \log M_* < 8.5$) in the field using a spatially large, high resolution cosmological zoom simulation which covers the cosmic web environment between two protoclusters. We find that the shock-heated sheet acts as an environmental quencher much like clusters and filaments at lower redshift, creating a population of quenched, central dwarf galaxies. Even massive dwarfs which do not quench are affected by the shock, with reductions to their sSFR and gas accretion. This process can potentially explain the presence of isolated quenched dwarf galaxies, and represents an avenue of pre-processing, via which quenched satellites of bound systems quench before infall.
