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Collaborative Research: The Merian Survey. Characterizing Dark Matter and Feedback in Star Forming Dwarf Galaxies

合作研究：梅里安调查。

基本信息

批准号：
2106730
负责人：
Jenny Greene
金额：
$ 37.08万
依托单位：
Princeton University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-07-01 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2106730&HistoricalAwards=false
关键词：
Collaborative Research Merian Survey.Characterizing

项目摘要

While most of the mass in the universe is unseen, the smallest galaxies in the universe (the so-called dwarf galaxies) pose significant challenges to this “dark matter” model. In order to further test our best dark matter models, a large observational survey of dwarf galaxies is needed. This project focuses on the Meriam survey, which will observe 100,000 dwarf galaxies with known distances. Furthermore, each of the dwarf galaxies in this survey has constraints on their dark matter content from other methods. The new data will provide their stellar structure and colors. These results can all be taken together to test our ideas of dark matter in the universe. The team will place priority on recruiting a diverse group of students who will carry out the data mining that will be required in the era of the Vera Rubin Observatory. Established programs at both Princeton and UC Santa Cruz recruit historically underserved students for summer research and then continuing cohort support. These students will be trained in "big-data'' and modern science analysis with Merian. Extensive studies of dwarf galaxies have revealed a considerable scatter in many of their fundamental properties. In particular, galaxies with stellar mass of 108 - 109 Msun present a diversity of star formation rates and rotation-curve shapes which are in tension with theoretical models. Reliably characterizing the dark matter distribution and baryonic processes in these galaxies, such as feedback, is key to in order to establish a complete picture of dark matter on small scales. The Merian survey will obtain a volume-limited census of dwarf galaxies in this mass range at z=0.058-0.1. Using two custom made filters, Merian will provide redshifts to a complete sample of 100,000 star forming dwarf galaxies (two orders of magnitude larger than SDSS+GAMA) over an area of 870 deg2. Combined with deep+high spatial resolution imaging from the Hyper-Suprime Camera, this program will result in high S/N weak lensing profile measurements for dwarf galaxies, probing their dark matter halos out to their virial radii. Also, Hyper-Suprime Camera imaging will be used to measure dwarf sizes and shapes. The next generation of scientists must be trained to deal with the deluge of Vera Rubin Observatory data coming in the next decade. Programs at both Princeton and UC Santa Cruz recruit historically underserved students for summer research and then continuing cohort support.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.

虽然宇宙中的大部分质量是看不见的，但宇宙中最小的星系（所谓的矮星系）对这种“暗物质”模型提出了重大挑战。为了进一步测试我们最好的暗物质模型，需要对矮星系进行大规模的观测调查。该项目的重点是梅里亚姆巡天，该巡天将观测 100,000 个已知距离的矮星系。此外，本次调查中的每个矮星系的暗物质含量都受到其他方法的限制。新数据将提供它们的恒星结构和颜色。这些结果都可以综合起来检验我们对宇宙中暗物质的看法。该团队将优先招募多元化的学生群体，他们将进行维拉鲁宾天文台时代所需的数据挖掘。普林斯顿大学和加州大学圣克鲁斯分校都设立了项目，招募历史上服务不足的学生进行夏季研究，然后继续提供队列支持。这些学生将接受 Merian 的“大数据”和现代科学分析培训。对矮星系的广泛研究揭示了其许多基本属性的相当大的分散性。特别是，恒星质量为 108 - 109 兆太阳的星系呈现出与理论模型存在张力的恒星形成速率和旋转曲线形状的多样性。可靠地表征这些星系中的暗物质分布和重子过程。星系，例如反馈，对于在小尺度上建立暗物质的完整图像至关重要。梅里安巡天将获得 z=0.058-0.1 质量范围内矮星系的体积有限普查。使用两个定制的滤波器，Merian 将为 100,000 个恒星形成矮星系（比 SDSS+GAMA 大两个数量级）的完整样本提供红移，覆盖面积为 870°2。结合超至尊相机的深度+高空间分辨率成像，该计划将对矮星系进行高信噪比弱透镜剖面测量，探测其暗物质晕直至其维里半径。此外，Hyper-Suprime 相机成像将用于测量矮人的大小和形状。下一代科学家必须接受培训以应对维拉·鲁宾的洪水观测数据将在未来十年内发布。普林斯顿大学和加州大学圣克鲁斯分校的项目都招收历史上服务不足的学生进行夏季研究，然后继续提供队列支持。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The Nature of Low-surface-brightness Galaxies in the Hyper Suprime-Cam Survey

DOI：
10.3847/1538-4357/ac7238
发表时间：
2022-04
期刊：
The Astrophysical Journal
影响因子：
0
作者：
J. Greene;J. Greco;A. Goulding;S. Huang 黄;Erin Kado-Fong;S. Danieli;J. Li 李;J. H. Kim;Y. Komiyama;A. Leauthaud;L. Macarthur;C. Sifón
通讯作者：
J. Greene;J. Greco;A. Goulding;S. Huang 黄;Erin Kado-Fong;S. Danieli;J. Li 李;J. H. Kim;Y. Komiyama;A. Leauthaud;L. Macarthur;C. Sifón

ELVES. III. Environmental Quenching by Milky Way–mass Hosts