CAREER: Studying Galaxies Across Human and Cosmic History

首席研究员（PI）Bezanson和她的团队将对星星形成的历史和像银河系这样的星系的生长进行普查。该团队将分析在宇宙历史的关键时期对大样本星系的观测。这项长基线研究将从大多数星系处于稳定配置的当前时代开始，然后转移到宇宙黄昏的样本，当大多数大型星系完成快速增长时，然后再看看宇宙正午，当大质量星系迅速形成恒星时。这项研究提供的定量统计措施对于微调下一代星系形成的模拟和模型至关重要。为了扩大对科学的参与，该团队将振兴历史悠久的阿勒格尼天文台的活动。该计划将包括公立学校参观，教师培训讲习班，艺术家在驻地计划，和科学工具包借阅图书馆。该小组将分析光谱从大样本的星系在每个时代，以估计恒星的人口和测试经验模型，以确定组装历史的星系在宇宙的时间。 当前纪元的样本（z 0.15）将来自阿帕奇点天文台附近星系测绘（MaNGA）调查，宇宙暮光的样本（0.6 z 1.0）将来自使用甚大望远镜的大型早期星系天体物理普查（LEGA-C）调查，在“宇宙正午”的样本（z约1.5）将来自使用斯巴鲁望远镜进行的主焦点光谱仪调查。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准。

Principal Investigator (PI) Bezanson and her team will make a census of the history of star formation and the growth of galaxies like the Milky Way. The team will analyze observations of large samples of galaxies at critical epochs in the history of the Universe. This long baseline study will start with the current epoch when most galaxies are in a stable configuration, move on to a sample at Cosmic Twilight, when most large galaxies finish their rapid growth, and then look to Cosmic Noon, when massive galaxies were rapidly forming stars. The quantitative, statistical measures provided by this study are critical to fine-tuning the next generation of simulations and models of galaxy formation. To broaden participation in science the team will revitalize activities at the historic Allegheny Observatory. The program will include public school visits, teacher training workshops, an artist in residence program, and a science kit lending library.The team will analyze spectra from large samples of galaxies at each epoch to estimate stellar populations and test empirical models to determine the assembly histories in galaxies over cosmic time. The sample for the current epoch (z 0.15) will come from the Mapping Nearby Galaxies at Apache point observatory (MaNGA) survey, the sample for Cosmic Twilight (0.6 z 1.0) will come from the Large Early Galaxy Astrophysics Census (LEGA-C) survey using the Very Large Telescope, and the sample at Cosmic Noon (z approx 1.5) will come from the Prime Focus Spectrograph survey using the Subaru Telescope.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.