The Physical Properties of Galaxies 7 Billion Years Ago

70 亿年前星系的物理特性

• 批准号: 271277850
• 负责人: Professor Dr. Arjen van der Wel
• 金额: --
• 依托单位: Max-Planck-Institut für Astronomie (MPIA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/271277850?language=en
• 关键词: Physical; Properties; Galaxies; Billion; Years

A key challenge in understanding galaxy formation is to characterize the structure and stellar content of galaxies across cosmic time. However, current techniques to measure the properties of distant galaxies are mostly based on photometry, subject to important systematic uncertainties. In order to remedy this we are conducting the LEGA-C survey: 128 nights on ESO's Very Large Telescope has been awarded to the writer of this proposal to obtain high-quality spectra of ~3000 distant galaxies over the next 5 years. These spectra will reveal the kinematic structure and stellar age and composition of galaxies at large look-back time. This enormous telescope time investment will directly teach us about galaxies ~7 Gyrs ago and will be crucial for the preparation of new missions and facilities in the next decade.Through this proposal I ask for funding for a postdoctoral researcher. The crucial role played by this researcher will be the execution and oversight of the data reduction pipeline and the kinematic analysis of the galaxy spectra. This work will enable a large number of projects and publications based on LEGA-C data. In particular, the researcher is expected to derive the first dynamical mass function of galaxies at significant look-back times.

理解星系形成的一个关键挑战是描述整个宇宙时间内星系的结构和恒星含量。然而，目前测量遥远星系性质的技术大多基于测光，受到重要的系统不确定性的影响。 为了弥补这一点，我们正在进行LEGA-C调查：ESO甚大望远镜的128个夜晚已被授予本提案的作者，以在未来5年内获得约3000个遥远星系的高质量光谱。 这些光谱将揭示星系的运动学结构和恒星年龄以及大回视时间的组成。 这个巨大的望远镜时间投资将直接教我们关于星系~7 Gyrs前，将是至关重要的准备新的任务和设施在未来十年。通过这个建议，我要求博士后研究人员的资金。该研究人员所发挥的关键作用将是执行和监督数据简化管道和星系光谱的运动学分析。 这项工作将使大量基于LEGA-C数据的项目和出版物成为可能。 特别是，研究人员有望在重要的回顾时间推导出星系的第一个动力学质量函数。

项目成果

Rejuvenation in z ∼ 0.8 Quiescent Galaxies in LEGA-C

• DOI: 10.3847/1538-4357/ab164d
• 发表时间: 2019-05
• 期刊: The Astrophysical Journal
• 作者: Priscilla Chauké;A. van der Wel;C. Pacifici;R. Bezanson;Po-Feng Wu;A. Gallazzi;C. Straatman;M. Franx;I. Barišić;E. Bell;J. van Houdt;M. Maseda;A. Muzzin;D. Sobral;J. Spilker

The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 2: Dynamical and Stellar Population Properties of z ≲ 1 Galaxies in the COSMOS Field

• DOI: 10.3847/1538-4365/aae37a
• 发表时间: 2018-09
• 期刊: The Astrophysical Journal Supplement Series
• 作者: C. Straatman;A. V. D. Wel;R. Bezanson;C. Pacifici;A. Gallazzi;Po-Feng Wu;K. Noeske;I. Barišić;E. Bell;G. Brammer;J. Calhau;Priscilla Chauké;M. Franx;J. V. Houdt;I. Labbé;M. Maseda;J. Muńoz-Mateos;A. Muzzin;J. V. D. Sande;D. Sobral;J. Spilker

THE VLT LEGA-C SPECTROSCOPIC SURVEY: THE PHYSICS OF GALAXIES AT A LOOKBACK TIME OF 7 Gyr

• DOI: 10.3847/0067-0049/223/2/29
• 发表时间: 2016-03
• 期刊: The Astrophysical Journal Supplement Series
• 作者: A. V. D. Wel;K. Noeske;R. Bezanson;C. Pacifici;A. Gallazzi;M. Franx;J. Muńoz-Mateos;E. Bell;G. Brammer;S. Charlot;Priscilla Chauké;I. Labbé;M. Maseda;A. Muzzin;H. Rix;D. Sobral;D. Sobral;J. V. D. Sande;P. V. Dokkum;Vivienne Wild;Christian Wolf