A Study of the Faint Debris Remnant of Large Galaxy, Small Galaxy Interactions

大星系、小星系相互作用的微弱碎片残余物的研究

• 批准号: 1614743
• 负责人: Kathryn Johnston
• 金额: $ 39.27万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-15 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1614743&HistoricalAwards=false
• 关键词: Study; Faint; Debris; Remnant; Large

Galaxies can grow bigger by accreting smaller, neighboring galaxies. The debris from such events leaves trails of stars in the outskirts of the growing galaxy. By analyzing the debris, scientists hope to reconstruct how these tumultuous events unfolded. The starlight from the debris is extremely faint at optical wavelengths. Observations of such low-surface-brightness debris have been possible only recently. The team will use cutting-edge theory and simulations to catalog the kinds of structures expected for the debris. The team's statistician will isolate the structures that help the most with the reconstructions. Observers will then look for such telltale structures. Senior team members will train junior members. During her colloquium visits nation-wide, the PI will discuss barriers facing minorities in science. Through a partnership with a non-profit, the team will engage with underserved high school students in New York City.The team will study debris structures left in galaxy halos by the destruction of small, accreted galaxies. The goals of the team are to (1) make theoretical estimates of the expected structures, (2) create libraries of synthetic surveys of simulated galaxy halos, and (3) develop and test statistical measures of various properties of the structures.

星系团可以通过吸积较小的邻近星系而变大。 这些事件的碎片在不断增长的星系的外围留下了恒星的痕迹。 通过分析碎片，科学家们希望重建这些动荡事件是如何展开的。 碎片发出的星光在可见光波段非常微弱。 直到最近才有可能观测到这种低表面亮度的碎片。 该团队将使用尖端的理论和模拟来分类碎片的结构类型。 该团队的统计学家将分离出对重建最有帮助的结构。 然后观察者将寻找这种能说明问题的结构。 资深团队成员将培训初级成员。 在全国范围的座谈会访问期间，PI将讨论少数民族在科学方面面临的障碍。 通过与一家非营利组织的合作，该团队将与纽约市服务不足的高中生接触。该团队将研究小型吸积星系毁灭后留在星系晕中的碎片结构。 该团队的目标是（1）对预期结构进行理论估计，（2）创建模拟星系晕的综合调查库，以及（3）开发和测试结构各种属性的统计测量。