Collaborative Research: The DEEP3 Survey - Three Fundamental Tests of Galaxy Evolution

该团队将扩展他们的DEEP 2光谱调查，使用高色散光谱与凯克望远镜的DEIMOS多目标光谱仪在红移范围0.5 z 1.5的星系。这个红移范围代表了宇宙历史的85%，在这段时间里，大多数星系质量被组装起来，星系形成了它们的盘。新的DEEP 3调查集中在扩展的Groth带，这是一个天空中的区域，已经被NASA的许多大型天文台观测到。该小组将利用这些和其他档案汇编一个全色目录，描述他们在从无线电到X射线的广泛波长范围内的调查星系。DEEP 3将比DEEP 2暗2.5倍，使观测的星系数量增加两倍。研究小组将通过测量它们在紫外线、红外线和无线电中的亮度，并根据DEEP 2和DEEP 3巡天中测量的光发射谱线进行诊断，来估计它们的巡天星系形成恒星的速度。他们将研究在DEEP 2中发现的星系中星星形成速率与现有恒星质量之间的紧密关系，并研究星系环境和形态如何影响这种关系。团队成员将使用DEEP 2和DEEP 3调查的观测结果来研究当盘状星系组装时，Tully-Fisher关系（星系的光度与其圆周旋转速度之间）等标度律如何随时间变化。他们将研究活动星系核在星星形成中的作用，并利用X射线观测寻找微弱隐藏的活动核的迹象。研究生和博士后学者将在参与研究时接受培训。正如早期的DEEP 2调查所做的那样，包括红移，测光和光谱在内的数据将被发布给天文学界。来自深度探测2的多波长图像，沿着交互式红移星表，已经可以在google sky上获得;随着新的调查的进行，更多的数据将被添加进来。

This team will extend their DEEP2 spectroscopic survey, using high dispersion spectra with the DEIMOS multi-object spectrograph at the Keck telescopes for galaxies in the redshift range 0.5 z 1.5. This redshift range represents 85% of cosmic history, over the time when most of the galaxy mass was assembled and galaxies formed their disks. The new DEEP3 survey concentrates on the extended Groth strip, an area on the sky that has been observed with many of NASA's great observatories. The team will use these and other archives to compile a panchromatic catalog describing their survey galaxies over a wide wavelength range from radio to X-rays. DEEP3 will push the limit of observations 2.5 times fainter than DEEP2, tripling the number of measured galaxies.The team will estimate the rate at which their survey galaxies are forming their stars, by measuring their brightness in the ultraviolet, infrared and radio, and by using diagnostics based on the optical emission lines measured in the DEEP2 and DEEP3 surveys. They will investigate a tight relation found in DEEP2 between the rate of star formation in a galaxy and the mass in stars already present, and examine how galaxy environment and morphology affect that relation. Team members will use observations from the DEEP2 and DEEP3 surveys to study how scaling laws such as the Tully-Fisher relation (between a galaxy's luminosity and its circular rotation speed) change over time as disk galaxies are assembled. They will investigate the role of active galactic nuclei in star formation, and use X-ray observations to search for signs of faint hidden active nuclei.Graduate students and postdoctoral scholars will be trained as they participate in the research. As has been done for the earlier DEEP2 survey, data including redshifts, photometry, and spectra would be released to the astronomical community. Multiwavelength images from DEEP2, along with an interactive redshift catalog, are already available on google sky; more data will be added as the new survey proceeds.