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2022 Fiscal Year Final Research Report

Multi-dimensional radiation-hydrodynamic simulations of luminous supernovae

Research Project

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Project/Area Number 19K14770
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 16010:Astronomy-related
Research InstitutionThe University of Tokyo (2022)
National Astronomical Observatory of Japan (2019-2021)

Principal Investigator

Suzuki Akihiro  東京大学, 大学院理学系研究科(理学部), 特任助教 (50647659)

Project Period (FY) 2019-04-01 – 2023-03-31
Keywords超新星 / ガンマ線バースト / 放射輸送 / 流体力学 / 大規模シミュレーション / 突発天体
Outline of Final Research Achievements

In this study, we focus on exceptionally luminous classes of optical transients and developed radiation-hydrodynamic models based on numerical simulations. So-called superluminous supernovae are among the brightest optical astronomical transients arising from the gravitational collapse of massive stars. Despite their interesting nature, the origin of the bright thermal emission and their progenitor system are still unclear.
In this study, we conducted series of multi-dimensional radiation-hydrodynamic simulations based on some proposed scenarios of superluminous supernovae. We succeeded in establishing the multi-dimensional picture of bright transient powered by the collision of the ejecta material with surrounding massive media and by the central compact power source such as a blackhole or neutron star.

Free Research Field

天体物理学

Academic Significance and Societal Importance of the Research Achievements

宇宙に輝く天体の中には、突発天体と呼ばれる一時的に明るく輝き暗くなっていく種族が存在する。例えば重力崩壊型超新星は太陽の8-10倍以上の質量を持って生まれた星(大質量星)が進化の最終段階に爆発する現象である。重力崩壊型超新星の中でも近年注目されているのは、その明るさが通常の超新星の10-100倍にも達する超高輝度超新星で、その起源はまだ明らかでない。本研究では、スーパーコンピュータ上で多次元放射流体力学シミュレーションを実施することで、超高輝度超新星がどのように光るかを調べ、その多次元的な描像を明らかにした。

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Published: 2024-01-30  

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