Understanding the Origin of the Hubble Sequence of Galaxies

AST-0307859 Ellis该计划将支持在各种红移和回顾时间观察到的大样本星系的新地面数据的整理，目标是开发一个关于星系如何演化和组装的自洽观测故事，以产生今天看到的形态多样性。 未来的重点是确定一个不断发展的星系的基本质量，无论是从内部动力学通过超深凯克10米光谱和深红外测光与帕洛玛5米望远镜。 这是一个独立的数据集，将用于追踪遥远星系的增长率和星系从一种形态类别到另一种形态类别的运动。 这也是加州理工学院和加州大学同事已经进行的DEEP 2红移调查（部分NSF支持）的一个有价值的补充。 该团队拥有无与伦比的必要望远镜和仪器，并将根据比目前任何可用的样本大一百倍的样本，制作形态进化和组装历史的综合图片。该研究包括研究生和本科生培训，有用的附带技术形式，供其他研究人员在数据分析中使用，并将与加州理工学院一项名为“用大型望远镜揭开宇宙历史”的新公共外展计划密切相关。

AST-0307859EllisThis program will support the collation of new ground-based data for large samples of galaxies observed at various redshifts and look-back times with the goal of developing a self-consistent observational story of how galaxies evolve and assemble to produce the diversity of morphologies seen today. The way forward focuses on determining the underlying mass of an evolving galaxy, both from internal dynamics via ultra-deep Keck 10m spectroscopy and from deep infrared photometry with the Palomar 5m telescope. This is a self-contained data set, which will be used to trace the growth rate of distant galaxies and the movement of galaxies from one morphological category to another. It is also a valuable addition to the DEEP2 redshift survey already being conducted (with partial NSF support) by Caltech and University of California colleagues. The team has unrivalled access to the necessary telescopes and instrumentation, and will produce an integrated picture of morphological evolution and assembly history, based on a sample a hundred times larger than any currently available.The research includes graduate and undergraduate student training, useful spin-off in the form of techniques for other researchers to use in their data analysis, and will be intimately linked with a new public outreach program at Caltech entitled Unravelling Cosmic History with Large Telescopes.***