2009 Fiscal Year Final Research Report
Physical and chemical evolution of dust in the early universe and its effect on the observations and the star formation history
| Project/Area Number |
19740094
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | The University of Tokyo (2008-2009)
Hokkaido University (2007) |
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Principal Investigator |
NOZAWA Takaya The University of Tokyo, 数物連携宇宙研究機構, 特任研究員 (90435975)
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| Research Collaborator |
KOZASA Takashi 北海道大学, 大学院・理学研究院, 教授 (90263368)
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| Project Period (FY) |
2007 – 2009
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| Keywords | ダスト(星間塵) / 超新星爆発 / 超新星残骸 / 可視光赤外線観測 / 物質進化 |
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| Research Abstract |
We investigated the formation of dust in the ejecta of supernovae that are considered to be sources of interstellar dust in the early universe. Then we studied the evolution of the newly formed dust in the shocked gas within the supernova remnants and revealed the size distribution and mass of the dust injected into the interstellar medium. Based on the results of these calculations, we estimated UV-optical extinction curves expected in the early universe. We also demonstrated how the formation process of dust depends on the type of supernovae through the varying thickness of their outer envelopes.
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