Origin of stars, brown dwarfs and planets

恒星、褐矮星和行星的起源

• 批准号: 312092-2008
• 负责人: Jayawardhana, Ray
• 金额: $ 3.98万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=514882
• 关键词: Origin; stars; brown; dwarfs; planets

I propose an ambitious, multi-faceted research program using state-of-the-art instruments on several of the world's largest telescopes to investigate key questions related to the origins of stars, brown dwarfs and planets. The specific research plans include: (1) studies of multiplicity among young stars and brown dwarfs, using both adaptive optics imaging and spectroscopic radial velocity measurements; (2) searches for and characterization of the lowest-mass free-floating objects, with masses in the giant planet regime, using wide-field optical and infrared instruments, complemented by data from Spitzer, Herschel and JCMT, to probe the stellar initial mass function to unprecedented depth; and (3) investigations of gas and dust disk evolution around young stars during the late stages of planet formation using the Herschel Space Observatory and ground-based telescopes. The proposed program will lead to fundamental advances in our understanding of stellar and sub-stellar origins, and may also pave the way for detecting giant planets around young stars.

我提出一项雄心勃勃的、多方面的研究计划，利用世界上最大的几架望远镜上最先进的仪器，研究与恒星、棕矮星和行星起源有关的关键问题。具体的研究计划包括：(1)利用自适应光学成像和光谱径向速度测量对年轻恒星和褐矮星的多重性进行研究；(2)利用宽视场光学和红外仪器，结合斯皮策、赫歇尔和JCMT的数据，寻找质量最低、质量在巨行星范围内的自由漂浮天体，并对其进行表征，以前所未有的深度探测恒星的初始质量函数；(3)利用赫歇尔空间天文台和地面望远镜研究行星形成后期年轻恒星周围的气体和尘埃盘演化。拟议中的计划将导致我们对恒星和亚恒星起源的理解取得根本性进展，也可能为探测年轻恒星周围的巨行星铺平道路。