Dynamical instabilities in the aid of planet formation in circumstellar disks

有助于星周盘中行星形成的动力学不稳定性

• 批准号: 2007422
• 负责人: Wladimir Lyra
• 金额: $ 32.38万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2007422&HistoricalAwards=false
• 关键词: Dynamical; instabilities; aid; planet; formation

A three-year program conducted by New Mexico State University will simulate planets forming around young host stars using supercomputers. Many details in the roadmap of planet formation are still uncharted. Planets form out of disks of gas and dust that orbit young stars. This investigation will use powerful computers to produce simulations of planet formation and compare the results with modern observations. This research will be able to decide which models are more likely to account for planet formation. This project has an educational component focused on underserved Hispanic teenagers, with a goal is to inspire them to pursue higher education. The project will develop a science camp where students are taught reasoning skills and learn about astronomy. The project plans to reach 30% of all Hispanic teenagers living under the poverty line in Las Cruces. To consolidate gains, a three-month after-school program of lectures will be offered, by the end of which some students are paired with local astronomers for summer internships.The proposed work will potentially address the long-standing question of the robustness of planet formation, specifically in the crucial range of solar and sub-solar metallicity, by examining potential synergies between hydrodynamical and streaming instabilities. The work will strive to produce testable predictions in the form of (1) observational signatures of the planet-forming streaming instability in sub-mm wavelengths; (2) the observational appearance of dynamical instabilities in thermal emission and scattered light and (3) how vortices appear in scattered light, which is valuable to current surveys with SPHERE, GPI, and SCExAO, but also for future observations with JWST.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

由新墨西哥州州立大学进行的一个为期三年的项目将使用超级计算机模拟行星在年轻的宿主恒星周围形成。行星形成路线图中的许多细节仍然是未知的。行星是由围绕年轻恒星运行的气体和尘埃盘形成的。这项研究将使用强大的计算机来模拟行星的形成，并将结果与现代观测结果进行比较。这项研究将能够决定哪些模型更有可能解释行星的形成。该项目有一个教育部分，重点是服务不足的西班牙裔青少年，目标是激励他们追求高等教育。该项目将开发一个科学营，在那里学生被教导推理技能和学习天文学。该项目计划覆盖拉斯克鲁塞斯30%生活在贫困线以下的西班牙裔青少年。为了巩固成果，将提供为期三个月的课后讲座计划，在课程结束时，一些学生将与当地天文学家配对进行暑期实习。拟议的工作将通过研究流体动力学和流动不稳定性之间的潜在协同作用，潜在地解决长期存在的行星形成的鲁棒性问题，特别是在太阳和太阳下金属丰度的关键范围内。这项工作将致力于以以下形式产生可检验的预测：（1）在亚毫米波长下行星形成流不稳定性的观测特征;（2）在热辐射和散射光中观测到的动力学不稳定现象;（3）在散射光中涡旋是如何出现的，这对SPHERE、GPI和SCExAO的海流调查是有价值的。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

Aligning Retrograde Nuclear Cluster Orbits with an Active Galactic Nucleus Accretion Disc

• DOI: 10.1093/mnras/stad1295
• 发表时间: 2022-07
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: S. S. Nasim-S.;Gaia Fabj;Freddy Caban;Amy Secunda;K. Ford;B. McKernan;J. Bellovary;N. Leigh;W. Lyra