Collaborative Research: Tests of Dark Matter physics with isolated dwarf galaxies in the Dark Energy Survey

合作研究：暗能量巡天中用孤立矮星系进行暗物质物理测试

• 批准号: 2008110
• 负责人: Annika Peter
• 金额: $ 37.53万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2008110&HistoricalAwards=false
• 关键词: Collaborative; Research; Tests; Dark; Matter

One-quarter of the Universe consists of a form of matter whose nature is unknown --- dark matter (DM). The most striking prediction of the leading cold dark matter (CDM) paradigm is the existence and abundance of small collapsed clouds of dark matter, called halos. Small “dwarf” galaxies are expected to live in these small DM halos. By using observations of dwarf galaxies to count halos, the investigators will test CDM models. The investigators will complete a census of dwarf galaxies near our Milky Way Galaxy. With these observations, the investigators will search for a connection between galaxies and DM halos. The investigators will share the exciting story connecting galaxies to DM through a planetarium show developed in collaboration with the Ohio State University’s Slettebak Planetarium. The investigators will also assess and improve an early start summer program for undergraduates from underrepresented groups. The investigators will use a combination of optical data from the Dark Energy Survey (DES) and radio data from the Parkes-IMAGINE atomic hydrogen survey to detect and characterize nearby dwarf galaxies that contain as few as a million solar masses in gas and stars. They will use this census of dwarf galaxies to build theoretical models connecting dwarf galaxies with the dark matter halos that they inhabit. They will explore both isolated dwarf galaxies and ``satellite” galaxies orbiting more massive galaxies. Because much of the existing work on the connection between dwarf galaxies and their DM halos focuses on satellite galaxies, we must determine how the evolution of the stars and gas in satellite galaxies affects the matching between galaxies and their halos. The investigators will build a semi-empirical theoretical framework to interpret the data in the context of CDM. The investigators will use a variety of techniques, including surface-brightness fluctuation distance measurements on wide-field imaging data, automated dwarf galaxy and globular cluster identification and cross-matching between the stellar and atomic gas components of small galaxies.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.

宇宙的四分之一由一种性质未知的物质组成-暗物质(DM)。对主要的冷暗物质(CDM)范式最引人注目的预测是存在和丰富的被称为光晕的小型坍塌暗物质云。小型“矮小”星系预计将生活在这些小型DM光晕中。通过使用对矮星系的观测来计算光晕，研究人员将测试CDM模型。研究人员将完成对银河系附近矮小星系的普查。通过这些观测，研究人员将寻找星系和DM晕之间的联系。研究人员将通过与俄亥俄州立大学斯莱特巴克天文馆合作开发的天文馆展示，分享将星系与DM联系起来的令人兴奋的故事。调查人员还将评估和改进一项针对代表不足群体的本科生的提前开始暑期计划。研究人员将结合暗能量调查(DES)的光学数据和帕克斯-IMAGINE原子氢调查的无线电数据来探测和描述附近的矮星系，这些星系在气体和恒星中包含少至100万个太阳质量。他们将利用这次对矮星系的普查来建立理论模型，将矮星系与它们所居住的暗物质光晕联系起来。他们将探索孤立的矮小星系和围绕更大质量星系运行的“卫星”星系。由于现有的关于矮小星系和它们的DM晕之间的联系的大部分工作都集中在卫星星系上，我们必须确定卫星星系中恒星和气体的演化如何影响星系和它们的晕之间的匹配。研究人员将建立一个半经验的理论框架，在清洁发展机制的背景下解释数据。研究人员将使用各种技术，包括基于广域成像数据的表面亮度起伏距离测量，自动矮小星系和球状星团识别，以及小星系恒星和原子气体成分之间的交叉匹配。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势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

Discovery of a red backsplash galaxy candidate near M81

在 M81 附近发现红色后溅星系候选者

• DOI: 10.1093/mnras/stad352
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Casey, Kirsten J.;Greco, Johnny P.;Peter, Annika H. G.;Davis, A. Bianca
• 通讯作者: Davis, A. Bianca

Shadows in the Dark: Low-surface-brightness Galaxies Discovered in the Dark Energy Survey

• DOI: 10.3847/1538-4365/abca89
• 发表时间: 2020-06
• 期刊: The Astrophysical Journal Supplement Series
• 作者: D. Tanoglidis;A. Drlica-Wagner;K. Wei;Tian Li;Fjm Sanchez;Y.-H. Zhang;A. Peter;A. Feldmeier-Krause;J. Prat;K. Casey;A. Palmese;C. Sánchez;J. DeRose;C. Conselice;T. Abbott;M. Aguena;S. Allam;S. Ávila;K. Bechtol;E. Bertin;S. Bhargava;D. Brooks;D. Burke;A. Rosell;M. Kind;J. Carretero;C. Chang;M. Costanzi;L. Costa;J. Vicente;S. Desai;H. Diehl;P. Doel;T. Eifler;S. Everett;A. Evrard;B. Flaugher;J. Frieman;J. García-Bellido;D. Gerdes;R. Gruendl;J. Gschwend;G. Gutiérrez;W. Hartley;D. Hollowood;D. Huterer;D. James;E. Krause;K. Kuehn;N. Kuropatkin;M. Maia;M. March;J. Marshall;F. Menanteau;R. Miquel;R. Ogando;F. Paz-Chinchón;A. Romer;A. Roodman;E. Sánchez;V. Scarpine;S. Serrano;I. Sevilla-Noarbe;M. Smith;E. Suchyta;G. Tarlé;D. Thomas;D. Tucker;A. Walker