2009 Fiscal Year Final Research Report
Theoretical and observational study on supernova explosion mechanism and cosmological application.
| Project/Area Number |
20840007
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| Research Category |
Grant-in-Aid for Young Scientists (Start-up)
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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 |
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Principal Investigator |
MAEDA Keiichi The University of Tokyo, 数物連携宇宙研究機構, 特任助教 (00503880)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 宇宙物理 / 天文 / 宇宙論 / 超新星 / 輻射輸送 / 元素合成 |
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| Research Abstract |
Type Ia supernovae (SNe Ia) are thermonuclear explosions of a white dwarf. In this research, (1) I calculated nuclear reactions in SNe Ia and studied a role of type Ia as the origin of some elements in the Universe, and (2) provided an observational method to clarify how the thermonuclear sparks are ignited within a white dwarf. (3) Based on this prediction, I examined available observational data and showed that the ignition generally starts at an offset from the center of a white dwarf. (4) I further proved that this asymmetry is the origin of a mysterious diversity in SNe Ia. These results have various implications for the supernova cosmology. These provide breakthroughs in the related fields since these findings can solve several unresolved issues by a single, unified scenario.
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[Journal Article] Nucleosynthesis in two-dimensional delayed detonation models of type Ia supernova explosions2010
Author(s)
Maeda, K., Roepke, F. K., Fink, M., Hillebrandt, W., Travaglio, C., Thielemann, F.-K.
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Journal Title
The Astrophysical Journal 712
Pages: 624-638
Peer Reviewed
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