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: 1616636
• 负责人: Steven Majewski
• 金额: $ 33.59万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing 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=1616636&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.

来自弗吉尼亚大学和北肯塔基大学的科学家将共同努力，计算成对的银河系中有多少星星。使用将每个恒星将光线拆分为“光谱”的仪器，它们将显示每对由大或小星星，热或冷星，老恒星或年轻恒星组成。有了这些信息，天文学家可以更好地理解恒星是如何以银河系形成的，以及成为一对成员对行星的诞生的重要性。每所大学的研究生和本科生将在三年内分析超过163,000颗星星的光。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irénéedupont望远镜。这些研究人员与两所大学的研究生和本科生一起，建议分析Apache Point Pointatory银河进化实验（Apogee）径向速度调查数据的163,000颗恒星分布在整个银河系（磁盘，光晕和凸起）中，以寻找具有广泛范围的恒星类型的恒星，恒星类型，金属，金属，金属和金属和高级和艾式。他们将利用作为SDSS-III/Apogee-1高分辨率IR光谱调查的一部分获得的数据，该调查已经观察到多个（数十个）时期的14,000颗恒星。这些建议将通过新的调查（SDSS-IV/Apogee-2）来完成这些数据，以扩展临时基准和观察到的来源的数量。他们的目标是确定伴侣的频率是宿主星化学，动力学，进化阶段，在银河系中的位置和环境的函数。他们还建议使用Wiyn望远镜上的新Speckle摄像头对目标样本进行后续斑点干涉测量值，他们计划通过该奖项中的资金来建立。基于Apogee-1数据的初步光谱调查已经在数百个系统中生成了Stellar，Brown Dwarf和Hot Jupiter Companions的样本。 Majewski博士是Apogee-1和Apogee-2项目的PI。