K-CLASH: spatially resolving star-forming galaxies in field and cluster environments at z ˜ 0.2-0.6
K-CLASH: spatially resolving star-forming galaxies in field and cluster environments at z ˜ 0.2-0.6
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K-CLASH：在 z 0.2-0.6 的场和星团环境中空间解析恒星形成星系
DOI：
10.1093/mnras/staa1418
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发表时间：
2020
影响因子：
4.8
通讯作者：
Ansarinejad B
中科院分区：
文献类型：
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作者：
Ansarinejad B
我们提出了KMOS- clash （K-CLASH）调查，这是一个k波段多目标光谱仪（KMOS）调查191个（主要是蓝色）h探测星系在场和星团环境中的空间分辨气体特性和运动学。K-CLASH的目标是四个星团透镜和超新星调查中的星系，在kmos波段，超半径（-Mpc）视场中使用哈勃（CLASH）场。K-CLASH的目的是研究恒星形成星系从湍流的、高度形成恒星的盘状奇特系统到相对静止的、有序的晚型星系的转变，并研究星团在此后形成红色序列中的作用。在本文中，我们描述了K-CLASH的调查，展示了样本，并提供了K-CLASH星系性质的概述。我们证明，我们的样本包括恒星形成星系典型的恒星质量和时代，驻留在现场和星团环境。我们得出结论，K-CLASH提供了一个理想的样本，以弥补现有的大积分场光谱调查在高红移和低红移之间的差距。我们发现，处于中间红移的形成恒星的K-CLASH星团星系的恒星质量系统性地低于该领域中形成恒星的同类星系，这暗示了在这些时期星团中星系生长的可能“缩小”情景。在考虑了恒星质量之后，我们在两种环境中测量到的h探测到的恒星形成率和恒星形成星系之间没有差异，这表明在K-CLASH探测的时代，星团的猝灭发生得非常迅速，或者星团中形成恒星的K-CLASH星系最近才到达那里，没有足够的时间来猝灭发生。
We present the KMOS-CLASH (K-CLASH) survey, a K-band Multi-Object Spectrograph (KMOS) survey of the spatially-resolved gas properties and kinematics of 191 (predominantly blue) H-detected galaxies atin field and cluster environments. K-CLASH targets galaxies in four Cluster Lensing And Supernova survey with Hubble (CLASH) fields in the KMOS-band, overradius (-Mpc) fields-of-view. K-CLASH aims to study the transition of star-forming galaxies from turbulent, highly star-forming disc-like and peculiar systems at-, to the comparatively quiescent, ordered late-type galaxies at, and to examine the role of clusters in the build-up of the red sequence since. In this paper, we describe the K-CLASH survey, present the sample, and provide an overview of the K-CLASH galaxy properties. We demonstrate that our sample comprises star-forming galaxies typical of their stellar masses and epochs, residing both in field and cluster environments. We conclude K-CLASH provides an ideal sample to bridge the gap between existing large integral-field spectroscopy surveys at higher and lower redshifts. We find that star-forming K-CLASH cluster galaxies at intermediate redshifts have systematically lower stellar masses than their star-forming counterparts in the field, hinting at possible "downsizing" scenarios of galaxy growth in clusters at these epochs. We measure no difference between the star-formation rates of H-detected, star-forming galaxies in either environment after accounting for stellar mass, suggesting that cluster quenching occurs very rapidly during the epochs probed by K-CLASH, or that star-forming K-CLASH galaxies in clusters have only recently arrived there, with insufficient time elapsed for quenching to have occured.