z~2处的恒星形成星系团：星系动力学和聚集的新图像
Star-Forming Galaxies at z~2: An Emerging Picture of Galaxy Dynamics and Assembly
摘要：
在这些会议记录中，我们总结了最近的结果，从我们的“VLT”/SINFONI积分场调查，重点是52个检测到的UV/光学选择的恒星形成星系在z~2。我们对这些系统的H-α发射线成像和运动学数据表明，这些星系中有相当大的一部分（> 1/3）是大的旋转盘，这些盘是致密的，厚的，并迅速形成恒星。我们比较这些系统的本地磁盘缩放关系，发现这些关系的骨干已经在z~2。对我们样本中的大圆盘的详细分析提供了强有力的证据，证明这一种群不能由合并主导的形成历史产生，而是必须由气体沿细丝平稳但快速的流入组装而成。然后，这些系统将在短时间尺度上从团块主导的盘演变为膨胀主导的盘，这是我们在ESTA观测中观察到的现象，并且与数值模拟的预测一致。这些结果提供了新的和令人兴奋的见解形成的膨胀为主的星系在本地宇宙。
英文摘要：
In these proceedings, we summarize recent results from our "SINS" VLT/SINFONI integral-field survey, focusing on the 52 detected UV/optically-selected star-forming galaxies at z~2. Our H-alpha emission-line imaging and kinematic data of these systems illustrates that a substantial fraction (> 1/3) of these galaxies are large, rotating disks and that these disks are clumpy, thick, and forming stars rapidly. We compare these systems to local disk scaling relations and find that the backbones of these relations are already in place at z~2. Detailed analysis of the large disks in our sample provides strong evidence that this population cannot result from a merger-dominated formation history and instead must be assembled by the smooth but rapid inflow of gas along filaments. These systems will then secularly evolve from clump-dominated disks to bulge-dominated disks on short timescales, a phenomenon that is observed in our SINS observations and is consistent with predictions from numerical simulations. These results provide new and exciting insights into the formation of bulge-dominated galaxies in the local Universe.
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