2017 Fiscal Year Final Research Report
The third revolution in cosmological hydrodynamic simulations: first galaxy formation and reionization
| Project/Area Number |
26247022
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Osaka University |
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Principal Investigator |
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| Research Collaborator |
YAJIMA Hidenobu 東北大学
SHIMIZU Ikko 大阪大学
AOYAMA Shohei 大阪大学
HIRASHITA Hiroyuki
Hou Kuan-Chou
Chen Li-Hsin
Zhu Qirong Penn State Univ.
Sadegh Khochfar
Claudio Dalla Vecchia
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| Project Period (FY) |
2014-06-27 – 2018-03-31
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| Keywords | 宇宙論 / 構造形成 / 銀河形成 / 星形成 / 超新星爆発 / フィードバック |
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| Outline of Final Research Achievements |
Using the cosmological SPH code GADGET-3, we have acquired a more unified view of galaxy formation from the early Universe to the present time. We implemented a new supernova feedback model and a model for dust formation and destruction into our simulation code, and succeeded in following the temporal and spatial distribution of dust and metals. We also computed the luminosity and mass functions of galaxies, as well as the spatial variation of galactic extinction. Furthermore, using cosmological zoom simulations, we examined the mass accretion and star formation histories of dwarf galaxies at high redshift. As a result, we found that the gas is blown out of the galaxy due to strong feedback, and that the galaxy evolved into a more disturbed morphology at high redshift.
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| Free Research Field |
宇宙物理学
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