Collaborative Research: Testing the Lambda Cold Dark Matter Paradigm with Dwarf Satellites of Low-mass Galaxies

合作研究：用低质量星系的矮卫星测试 Lambda 冷暗物质范式

• 批准号: 1816196
• 负责人: Jeffrey Carlin
• 金额: $ 5.67万
• 依托单位: Association of Universities for Research in Astronomy, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-15 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1816196&HistoricalAwards=false
• 关键词: Collaborative; Research; Testing; Lambda; Cold

All large galaxies, like our own Milky Way, are surrounded by many smaller "satellite" companion galaxies. Scientists have recently discovered tiny satellite galaxies around the Large Magellanic Cloud, a small Milky Way companion galaxy. Current predictions are not able to reproduce the numbers and properties of these satellite galaxies. Small "dwarf" galaxies thus challenge our understanding of the physical processes that shape galaxies. To solve the puzzle, this project explores galaxies beyond the Milky Way and its Local Group of galaxies. The investigators will test predictions by searching for the tiniest satellites around small galaxies beyond our Local Group. These satellites are predicted to be faint and can only be found using the most advanced telescopes on Earth. The properties of the new objects will be compared to satellites in our Local Group and interpreted in the context of theoretical models. The three investigators, together with a postdoctoral researcher and students, will use state-of-the-art instrumentation on large optical telescopes to perform systematic, panoramic imaging surveys of 11 sub-Milky Way-mass target galaxies. The research team will interpret this census of faint satellites with the aid of dedicated analytical models. The final goal is to inform our understanding of the galaxy formation physics at the lowest mass scales. These observations can reveal how the stellar content of dwarf galaxies relates to their dark matter halos. The results will be interpreted as a function of galaxy environment, halo mass and morphology, thus providing quantitative constraints for star formation, feedback and re-ionization prescriptions in the framework of galaxy formation models.The Investigators will use this research to increase the involvement of underrepresented minorities in astronomy by developing a support network for women in science at the University of Tampa. This will provide valuable guidance for their future careers and advise them on gender balance issues. At Ohio State University (OSU), astronomy-themed YouTube coding videos will be developed for high school students. Additionally, a peer-mentoring program led by OSU students will be supported by this program through participation in a dedicated Leadership Retreat.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.

所有大型星系，例如我们自己的银河系，都被许多较小的“卫星”同伴星系包围。科学家最近在大型麦芽云云周围发现了微小的卫星星系，这是一个小的银河系伴侣银河系。当前的预测无法再现这些卫星星系的数量和特性。因此，小“矮人”星系挑战了我们对塑造星系的物理过程的理解。为了解决难题，该项目探索了银河系以外的星系及其当地星系。调查人员将通过寻找当地小组以外的小星系周围最细的卫星来测试预测。这些卫星被预测为微弱，只能使用地球上最先进的望远镜找到。新对象的属性将与我们本地组中的卫星进行比较，并在理论模型的背景下进行解释。这三名研究人员以及博士后研究人员和学生将使用大型光学望远镜上的最先进的仪器来对11个sub-Milky Way-Mass目标星系进行系统的全景成像调查。研究团队将借助专用的分析模型来解释这种微弱的卫星的普查。最终目标是告知我们以最低质量尺度的星系形成物理学的理解。这些观察结果可以揭示矮星系的恒星含量与它们的暗物质光环有关。结果将被解释为星系环境，光环质量和形态的函数，从而为星系形成模型的框架中的星形形成，反馈和重新定义处方提供了定量约束。研究人员将使用这项研究来增加对少数人在科学校园中为女性提供支持网络的少数人的参与。这将为他们的未来职业提供宝贵的指导，并就性别平衡问题提供建议。在俄亥俄州立大学（OSU），将为高中生制定以天文学为主题的YouTube编码视频。此外，由OSU学生领导的同伴课程将通过参加专门的领导力务虚会来得到该计划的支持。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估审查标准通过评估来获得支持的。

项目成果

Six More Ultra-faint Milky Way Companions Discovered in the DECam Local Volume Exploration Survey

• DOI: 10.3847/1538-4357/acdd78
• 发表时间: 2022-09
• 期刊: The Astrophysical Journal
• 作者: W. Cerny;C. E. Mart'inez-V'azquez;A. Drlica-Wagner;A. Pace;B. Mutlu-Pakdil;T. Li;A. Riley;D. Crnojevi'c;C. Bom;J. Carballo-Bello;J. Carlin;A. Chiti;Y. Choi;M. Collins;Elise Darragh-Ford;P. Ferguson;M. Geha;D. Mart'inez-Delgado;P. Massana;S. Mau;G. Medina;R. Muñoz;E. Nadler;K. Olsen;A. Pieres;J. Sakowska;J. Simon;G. Stringfellow;A. K. Vivas;A. Walker;R. Wechsler

Low-density star cluster formation: discovery of a young faint fuzzy on the outskirts of the low-mass spiral galaxy NGC 247

低密度星团的形成：在低质量螺旋星系NGC 247的外围发现了一个年轻的微弱模糊星团

• DOI: 10.1093/mnras/stac2898
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Romanowsky, Aaron J.;Larsen, Søren S.;Villaume, Alexa;Carlin, Jeffrey L.;Janz, Joachim;Sand, David J.;Strader, Jay;Brodie, Jean P.;Chakrabarti, Sukanya;Cheng, Chloe M.
• 通讯作者: Cheng, Chloe M.

Low-metallicity globular clusters in the low-mass isolated spiral galaxy NGC 2403

低质量孤立螺旋星系 NGC 2403 中的低金属丰度球状星团

• DOI: 10.1093/mnras/stac503
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Forbes, Duncan A.;Ferré-Mateu, Anna;Gannon, Jonah S.;Romanowsky, Aaron J.;Carlin, Jeffrey L.;Brodie, Jean P.;Day, Jacob
• 通讯作者: Day, Jacob

Hubble Space Telescope Observations of Two Faint Dwarf Satellites of Nearby LMC Analogs from MADCASH*

哈勃太空望远镜对来自 MADCASH* 附近 LMC 类似物的两颗微弱矮卫星的观测

• DOI: 10.3847/1538-4357/abe040
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Carlin, Jeffrey L.;Mutlu-Pakdil, Burçin;Crnojević, Denija;Garling, Christopher T.;Karunakaran, Ananthan;Peter, Annika H.;Tollerud, Erik;Forbes, Duncan A.;Hargis, Jonathan R.;Lim, Sungsoon
• 通讯作者: Lim, Sungsoon

Tidal Destruction in a Low-mass Galaxy Environment: The Discovery of Tidal Tails around DDO 44

低质量星系环境中的潮汐毁灭：DDO 44 周围潮汐尾的发现

• DOI: 10.3847/1538-4357/ab4c32
• 发表时间: 2019
• 期刊: The Astrophysical Journal
• 作者: Carlin, Jeffrey L.;Garling, Christopher T.;Peter, Annika H.;Crnojević, Denija;Forbes, Duncan A.;Hargis, Jonathan R.;Mutlu-Pakdil, Burçin;Pucha, Ragadeepika;Romanowsky, Aaron J.;Sand, David J.
• 通讯作者: Sand, David J.