Gas and Dust in Galaxies over Cosmic Time

尘埃和分子气体在星系的生命中扮演着重要的角色，影响着宇宙时间内恒星的形成。与此同时，随着星系年龄的增长，分子气体和尘埃的性质会随着它们内部恒星形成的历史而变化。这个项目将在星系生长的大型宇宙学模拟中模拟尘埃和气体的形成、增长和破坏。这些模拟将被用来确定如何利用对气体和尘埃的观测和探测来了解星系的历史。这个项目将使用宇宙流体动力学星系演化模拟来了解红移范围z~2-6内尘埃质量函数的起源和演化。这些模拟将包含一个新的关于尘埃形成、增长和破坏的自洽模型。这些模型还将包括详细的化学、热物理和辐射传输，这些辐射传输决定了分子云演化的微物理。气体和尘埃模型也将被包括在可以被许多最常见的星系形成代码使用的“杂乱无章”的代码环境中。这个奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Dust and molecular gas play a strong role in the lives of galaxies, affecting star formation over cosmic time. At the same time, as the galaxies age, the properties of the molecular gas and dust change in response to the history of star formation within them. This project will simulate the formation, growth, and destruction of dust and gas in large cosmological simulations of the growth of galaxies. The simulations will be used to determine how observations and detection of gas and dust can be used to learn about the histories of galaxies.This project will used cosmological hydrodynamic galaxy evolution simulations to learn about the origin and evolution of the dust mass function in the redshift range z ~ 2-6. These simulations will incorporate a new self-consistent model of the formation, growth, and destruction of dust. These models will also include detailed chemistry, thermal physics, and radiative transfer that dictates the microphysics of molecular cloud evolution. The gas and dust models will also be included in the "grackle" code environment that can be used by many of the most common galaxy formation codes in use.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.