A survey of the types of stars and massive planets that make up binary pairs in the Milky Way Galaxy

对银河系中构成双星对的恒星和大质量行星类型的调查

• 批准号: 1616684
• 负责人: Nathan De Lee
• 金额: $ 8.57万
• 依托单位: NORTHERN KENTUCKY UNIVERSITY RESEARCH FOUNDATION (DO NOT USE)
• 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 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1616684&HistoricalAwards=false
• 关键词: survey; types; stars; massive; planets

Scientists from the University of Virginia and Northern Kentucky University will work together to count how many stars in the Milky Way galaxy exist in pairs. Using an instrument that splits the light from each star into a "spectrum" they will show if each pair is made up of large or small stars, hot or cold stars, old or young stars. With this information astronomers can better understand how stars form in the Milky Way, and how important being a member of a pair can be to the birth of planets. The light from over 163,000 stars will be analyzed over a three year period by graduate and undergraduate students from each university. The data will be obtained using the Sloan Foundation Telescope at the Apache Point Observatory in New Mexico and the Irénée du Pont Telescope at Las Campanas Observatory in Chile.This is a collaborative proposal between Steven Majewski of the University of Virginia (UVa) and Nathan De Lee of Northern Kentucky University (NKU). Together with graduate and undergraduate students at both universities, these researchers propose to analyze Apache Point Observatory Galactic Evolution Experiment (APOGEE) radial velocity survey data of 163,000 stars spread throughout the galaxy (disk, halo and bulge) to search for companions to stars with a broad range of stellar spectral types, metallicities, and ages. They will exploit data acquired as part of the SDSS-III/APOGEE-1 high-resolution IR spectroscopic survey, which has already observed over 14,000 stars in multiple (dozens of) epochs. The proposers will complement these data with a new survey, SDSS-IV/APOGEE-2, to extend temporal baselines and the number of observed sources. Their goal is to determine the frequency of companions as a function of host star chemistry, dynamics, evolutionary stage, position in the Milky Way, and environment. They also propose follow-up near-IR speckle interferometric observations of a sample of targets using a new speckle camera on the WIYN telescope, which they plan to build with funds from this award. A pilot spectroscopic survey based on APOGEE-1 data has already produced samples of stellar, brown dwarf, and hot Jupiter companions in a few hundred systems. Dr. Majewski is the PI of both the APOGEE-1 and APOGEE-2 projects.

弗吉尼亚大学和北肯塔基大学的科学家将共同计算银河系中有多少恒星成对存在。他们使用一种仪器，将来自每颗恒星的光分成一个“光谱”，从而显示每一对恒星是由大恒星还是小恒星、热恒星还是冷星、老恒星还是年轻恒星组成的。有了这些信息，天文学家可以更好地了解银河系恒星是如何形成的，以及作为恒星对中的一员对行星的诞生有多重要。每所大学的研究生和本科生将在三年的时间里分析来自超过16.3万颗恒星的光。这些数据将使用新墨西哥州阿帕奇点天文台的斯隆基金会望远镜和智利拉斯坎帕纳斯天文台的Irénée Du Pont望远镜获得。这是弗吉尼亚大学的Steven Majewski和北肯塔基大学的Nathan De Lee共同提出的建议。这些研究人员与两所大学的研究生和本科生一起，提议分析阿帕奇点天文台星系演化实验(APOEE)的径向速度测量数据，这些数据分布在整个银河系(盘、晕和凸起)，以寻找具有广泛恒星光谱类型、金属度和年龄的恒星的伙伴。他们将利用作为SDSS-III/APOEE-1高分辨率红外光谱调查的一部分获得的数据，该调查已经在多个(数十个)时代观测了14,000多颗恒星。提出者将用一项新的调查--SDSS-IV/APOEE-2来补充这些数据，以延长时间基线和观测到的来源的数量。他们的目标是根据宿主星的化学、动力学、演化阶段、在银河系中的位置和环境来确定伴星的频率。他们还建议使用WIYN望远镜上的新散斑相机对目标样本进行后续近红外散斑干涉观测，他们计划用该奖项的资金建造该望远镜。一项基于远地点一号数据的初步光谱调查已经在数百个系统中产生了恒星、棕矮星和热木星伴星的样本。马耶夫斯基博士是远地点一号和远地点二号项目的主要负责人。