The formation of stars, disks, and planets

恒星、圆盘和行星的形成

• 批准号: 227411-2011
• 负责人: Basu, Shantanu
• 金额: $ 2.7万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570267
• 关键词: formation; stars; disks; planets

We are modeling the formation process of stars, surrounding disks of gas and dust, and the planets that condense within them. This is an exciting time to be exploring our origins, due to dramatic increases in computational power for simulations, and the ability to compare with unprecedented high-resolution and sensitive maps from new global observatories. We will employ our disk formation and evolution computer simulation code to determine the masses of stars that could form in the early universe. The presently unknown lower limit to these masses has important consequences for subsequent cosmic history. We will also model the formation of planetary systems (including both gaseous and rocky planets) starting from the earliest stages of collapse of a nebular cloud. We will apply a new technique to determining the strength of magnetic fields in interstellar clouds using data of polarized electromagnetic emission from dust grains. We will also apply our own computer simulation code to test the assertion that magnetic fields in the Galaxy can severely limit the rate at which stars form, and also maintain the ubiquitously observed turbulent motions in interstellar clouds.

我们正在模拟恒星、周围的气体和尘埃盘以及在其中凝结的行星的形成过程。由于模拟计算能力的大幅提高，以及与新的全球天文台前所未有的高分辨率和敏感地图进行比较的能力，这是探索我们起源的激动人心的时刻。 我们将使用盘形成和演化计算机模拟代码来确定早期宇宙中可能形成的恒星质量。目前未知的这些质量的下限对随后的宇宙历史具有重要影响。我们还将从星云云塌陷的最早阶段开始模拟行星系统（包括气态行星和岩石行星）的形成。 我们将应用一种新技术，利用尘埃颗粒的偏振电磁发射数据来确定星际云中的磁场强度。我们还将应用我们自己的计算机模拟代码来测试银河系中的磁场可以严重限制恒星形成的速度，并维持星际云中普遍观察到的湍流运动的断言。