2020 Fiscal Year Final Research Report
Observational study of the progenitor and circumstellar environment of Type Ia supernovae
Project/Area Number |
19K23461
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Multi-year Fund |
Review Section |
0204:Astronomy, earth and planetary science, and related fields
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Research Institution | Kyoto University |
Principal Investigator |
Kawabata Miho 京都大学, 理学研究科, 研究員 (10847750)
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Project Period (FY) |
2019-08-30 – 2021-03-31
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Keywords | 超新星爆発 / Ia型超新星 / 親星 / 光赤外線観測 |
Outline of Final Research Achievements |
I performed an observational study of Type Ia supernovae in the early phase to place restrictions on their progenitor star and the explosion mechanism. Optical and near-infrared observations of Type Ia supernovae appearing in nearby galaxies were carried out with the 3.8m Seimei telescope at Okayama Observatory of Kyoto University and the 1.5m Kanata telescope at Hiroshima University. I estimated the radius of the progenitor stars by comparing the initial luminosity variations with explosion models. I determined the subclasses of each Type Ia supernova from the observational features. Since there are only a few examples of observations of these objects immediately after the explosion, this study has provided a good data sample.
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Free Research Field |
超新星爆発
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Academic Significance and Societal Importance of the Research Achievements |
本研究によって、爆発直後のIa型超新星の多バンドでの良い観測例を得ることができた。これまで観測例が限られている様々なサブクラスに属するサンプルを増やすことで、Ia型超新星全体について 未解決問題の解決の手がかりを得る。
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