Simulating galactic dust grain evolution on a moving mesh
Interstellar dust is an important component of the galactic ecosystem, playing a key role in multiple galaxy formation processes. We present a novel numerical framework for the dynamics and size evolution of dust grains implemented in the moving-mesh hydrodynamics code AREPO suited for cosmological...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Oxford University Press (OUP)
2020
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| Online Access: | https://hdl.handle.net/1721.1/125691 |
| _version_ | 1811095692362383360 |
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| author | McKinnon, Ryan Vogelsberger, Mark Torrey, Paul Marinacci, Federico Kannan, Rahul |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics McKinnon, Ryan Vogelsberger, Mark Torrey, Paul Marinacci, Federico Kannan, Rahul |
| author_sort | McKinnon, Ryan |
| collection | MIT |
| description | Interstellar dust is an important component of the galactic ecosystem, playing a key role in multiple galaxy formation processes. We present a novel numerical framework for the dynamics and size evolution of dust grains implemented in the moving-mesh hydrodynamics code AREPO suited for cosmological galaxy formation simulations. We employ a particle-based method for dust subject to dynamical forces including drag and gravity. The drag force is implemented using a second-order semi-implicit integrator and validated using several dusthydrodynamical test problems. Each dust particle has a grain-size distribution, describing the local abundance of grains of different sizes. The grain-size distribution is discretized with a second-order piecewise linear method and evolves in time according to various dust physical processes, including accretion, sputtering, shattering, and coagulation. We present a novel scheme for stochastically forming dust during stellar evolution and new methods for sub-cycling of dust physics time-steps. Using this model, we simulate an isolated disc galaxy to study the impact of dust physical processes that shape the interstellar grain-size distribution. We demonstrate, for example, howdust shattering shifts the grain-size distribution to smaller sizes, resulting in a significant rise of radiation extinction from optical to nearultraviolet wavelengths. Our framework for simulating dust and gas mixtures can readily be extended to account for other dynamical processes relevant in galaxy formation, like magnetohydrodynamics, radiation pressure, and thermochemical processes. Keywords: methods: numerical, dust, extinction, galaxies: evolution, galaxies: ISM |
| first_indexed | 2024-09-23T16:24:42Z |
| format | Article |
| id | mit-1721.1/125691 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:24:42Z |
| publishDate | 2020 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1256912022-10-02T07:55:33Z Simulating galactic dust grain evolution on a moving mesh McKinnon, Ryan Vogelsberger, Mark Torrey, Paul Marinacci, Federico Kannan, Rahul Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Interstellar dust is an important component of the galactic ecosystem, playing a key role in multiple galaxy formation processes. We present a novel numerical framework for the dynamics and size evolution of dust grains implemented in the moving-mesh hydrodynamics code AREPO suited for cosmological galaxy formation simulations. We employ a particle-based method for dust subject to dynamical forces including drag and gravity. The drag force is implemented using a second-order semi-implicit integrator and validated using several dusthydrodynamical test problems. Each dust particle has a grain-size distribution, describing the local abundance of grains of different sizes. The grain-size distribution is discretized with a second-order piecewise linear method and evolves in time according to various dust physical processes, including accretion, sputtering, shattering, and coagulation. We present a novel scheme for stochastically forming dust during stellar evolution and new methods for sub-cycling of dust physics time-steps. Using this model, we simulate an isolated disc galaxy to study the impact of dust physical processes that shape the interstellar grain-size distribution. We demonstrate, for example, howdust shattering shifts the grain-size distribution to smaller sizes, resulting in a significant rise of radiation extinction from optical to nearultraviolet wavelengths. Our framework for simulating dust and gas mixtures can readily be extended to account for other dynamical processes relevant in galaxy formation, like magnetohydrodynamics, radiation pressure, and thermochemical processes. Keywords: methods: numerical, dust, extinction, galaxies: evolution, galaxies: ISM United States. Department of Energy (Grant DE-FG02-97ER25308) United State. National Aeronautics and Space Administration (Einstein Postdoctoral Fellowship Grant PF7-180163) United States. National Aeronautics and Space Administration (Hubble Fellowship Grant HST-HF2-51341.001-A) 2020-06-05T17:40:10Z 2020-06-05T17:40:10Z 2018-05 2018-03 2019-06-10T11:28:04Z Article http://purl.org/eprint/type/JournalArticle 0035-8711 1365-2966 https://hdl.handle.net/1721.1/125691 McKinnon, Ryan et al. “Simulating Galactic Dust Grain Evolution on a Moving Mesh.” Monthly Notices of the Royal Astronomical Society 478,3 (August 2018): 2851–86. © 2018 The Authors en http://dx.doi.org/10.1093/mnras/sty1248 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press (OUP) arXiv |
| spellingShingle | McKinnon, Ryan Vogelsberger, Mark Torrey, Paul Marinacci, Federico Kannan, Rahul Simulating galactic dust grain evolution on a moving mesh |
| title | Simulating galactic dust grain evolution on a moving mesh |
| title_full | Simulating galactic dust grain evolution on a moving mesh |
| title_fullStr | Simulating galactic dust grain evolution on a moving mesh |
| title_full_unstemmed | Simulating galactic dust grain evolution on a moving mesh |
| title_short | Simulating galactic dust grain evolution on a moving mesh |
| title_sort | simulating galactic dust grain evolution on a moving mesh |
| url | https://hdl.handle.net/1721.1/125691 |
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