论文标题
研究紫外线/宇宙组中的主要环境淬火过程
Investigating the Dominant Environmental Quenching Process in UVCANDELS/COSMOS Groups
论文作者
论文摘要
我们探讨了星系组的淬火星系的比例如何相对于到该组中心，红移和恒星质量的距离，以确定$ 0.2 <z <z <0.8 $组的主要环境淬火过程。除了现有的多播放光度法外，我们还使用了UVCandels项目中的新UV数据，以从Zcosmos 20K组目录中得出组的新星系物理特性。将我们的分析限制为log $（m _*/m _ {\ odot}）> 10.56 $组星系的完整样本，我们发现被淬火的概率随着红移的减少而缓慢增加，与停滞的场星银河系不同。关于淬火概率如何随着分组内的时间增加的相应分析表明，主要的环境淬灭过程的特征是缓慢（$ \ sim $ gyr）时代。我们发现淬火时间约为$ 4.91^{+0.91} _ { - 1.47} $ gyrs，与缓慢的绞痛过程一致（Larson等，1980）和延迟 - 延迟-the-then-then-then-then-then-then-the-the-the-the-the-the-the-the-the-the-the-the-tal。2013arxiv：1206.3571v2 [cresence insure-phass in as tery arto sisher in as tery to ansto inst y asto at asto-ph.co]，尽管此数据是caser-ph.co）；
We explore how the fraction of quenched galaxies changes in groups of galaxies with respect to the distance to the center of the group, redshift, and stellar mass to determine the dominant process of environmental quenching in $0.2 < z < 0.8$ groups. We use new UV data from the UVCANDELS project in addition to existing multiband photometry to derive new galaxy physical properties of the group galaxies from the zCOSMOS 20k Group Catalog. Limiting our analysis to a complete sample of log$(M_*/M_{\odot})>10.56$ group galaxies we find that the probability of being quenched increases slowly with decreasing redshift, diverging from the stagnant field galaxy population. A corresponding analysis on how the probability of being quenched increases with time within groups suggests that the dominant environmental quenching process is characterized by slow ($\sim$Gyr) timescales. We find a quenching time of approximately $4.91^{+0.91}_{-1.47} $Gyrs, consistent with the slow processes of strangulation (Larson et al. 1980) and delayed-then-rapid quenching (Wetzel et al. 2013 arXiv:1206.3571v2 [astro-ph.CO]), although more data are needed to confirm this result.
