Search for supermassive white dwarfs
| Project/Area Number |
26800113
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
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| Research Institution | Nagoya University (2015-2017)
Japan Aerospace Exploration Agency (2014) |
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Principal Investigator |
Hayashi Takayuki 名古屋大学, 理学研究科, 学振特別研究員(SPD) (20637748)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | 白色矮星 / 激変星 / 強磁場 / 連星系 / プラズマ / X線天文学 / 降着柱 / 反射X線 / X線スペクトル / 国際情報交換 / アメリカ合衆国 |
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| Outline of Final Research Achievements |
The purpose of this research is to verify the mass limit of white dwarfs by measuring masses and radii of white dwarfs. The absolute luminosity of any type Ia supernova is thought to be almost constant because the mass limit is believed to be constant for any white dwarfs. Therefore, type Ia supernovae are used to measure distance to distant galaxies.
To accomplish the purpose, I created an X-ray spectral model of white dwarfs. Especially, I note that I modeled spectrum of X-ray reflection from white dwarf surface by a detailed computer simulation in addition to thermal X-ray spectrum from plasma near the white dwarf surface. The purpose will be accomplished by application of my X-ray spectral model to observed data.
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Report
(5 results)
Research Products
(25 results)
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[Journal Article] Systematic surveys of non-thermal emission from white dwarfs with Suzaku2014
Author(s)
Terada, Yukikatsu; Asahina, Masato; Hayashi, Takayuki; Harayama, Atsushi; Dotani, Tadayasu; Ishida, Manabu; Bamba, Aya; Makishima, Kazuo; Mukai, Koji; Urata, Yuji; Nitta, Atsuko; de Jager, Okkie; Chadwick, Paula; Wagner, Stefan; Buckley, David
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Journal Title
Proceedings of Suzaku-MAXI 2014
Volume: 1
Pages: 248-249
Related Report
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