Born in starbursts: exploring star formation in extreme environments

诞生于星爆：探索极端环境下的恒星形成

• 批准号: 2891054
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2891054
• 关键词: Born; starbursts; exploring; star; formation

A debate is raging in star formation: are the masses of stars set by the turbulent fragmentation of the clouds in which they form, or are they set by the fight between gravity and radiative feedback processes? Both appear to be possible, and perhaps dominate in different star-forming environments, but how and when they dominate is poorly understood. This is a long standing problem in astronomy, as the shape of the mass distribution of stars - the initial mass function, or "IMF" - is central nearly all fields or modern astrophysics, including observational cosmology and planet formation. In this PhD, the student will use high-resolution computer simulations to investigate how stars are born in very different environments, such as those found that are found at the centre of the Milky Way (violent) and those found in the outskirts of the Galaxy (quiescent). By exploring different physical processes, such as cloud turbulence, magnetic fields, chemical enrichment of the gas and radiative heating from stars, they will determine how the mass distribution of stars is shaped by the physics of the interstellar medium (ISM). The student will be using a state-of-the art astrophysics fluid code, Arepo, which they will run at dedicated supercomputing centres (including those at Cardiff and national facilities). This project will introduce the student to a wide variety of marketable skills, including high-performance computing, code development, and fluid dynamics. A solid background in coding is recommended (in any language).

一场辩论是在恒星形成中肆虐：恒星的质量是由它们形成的云的湍流碎片设定的，还是通过重力和辐射反馈过程之间的战斗来设定？两者似乎都是可能的，也许在不同的恒星形成环境中占主导地位，但是如何以及何时统治的方式是很差的。这是天文学的长期存在的问题，因为恒星的质量分布形状（初始质量功能或“ IMF”）几乎是所有田地或现代天体物理学，包括观察性宇宙学和行星形成。在该博士学位上，学生将使用高分辨率的计算机模拟来研究恒星在非常不同的环境中的出生方式，例如在银河系中心发现的恒星以及在银河系郊区（quiescent）郊区发现的恒星。通过探索不同的物理过程，例如云湍流，磁场，气体的化学富集和恒星的辐射加热，它们将确定恒星的质量分布是如何通过星际培养基的物理学（ISM）来塑造的。该学生将使用最先进的天体物理液代码AREPO，他们将在专用的超级计算中心（包括在加的夫和国家设施中）运行。该项目将向学生介绍各种可销售的技能，包括高性能计算，代码开发和流体动力学。建议（以任何语言）使用扎实的编码背景。