The first and second generations of population III supernovae and their nucleosynthesis

2014 Fiscal Year Final Research Report

• Project/Area Number: 23540262
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: NOMOTO Ken'ichi 東京大学, カブリ数物連携宇宙研究機構, 特任教授 (90110676)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Tomoharu 中部大学, 工学部, 准教授 (20280935)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 超新星 / 金属欠乏星 / 元素合成 / 初代星 / 矮小銀河

Outline of Final Research Achievements

The First Stars in the Universe, which contain no heavy elements and are called Population III stars, have been predicted to consist of Pop III.1 and III.2 depending on their masses. In the present study, we succeeded to provide the observational indications for Pop III.1 and III.2 stars. Namely, the elemental abundance patterns of extremely metal-poor stars indicate that most of the first generation supernovae belong to Pop III.2, although the clarification of the origin of Ca is necessary. Superluminous supernovae may have two kinds, i.e., magnetar-powerd supernovae are Pop III.2, while Pop III.1 supernovae are powered by collision or radioactive decays.

Free Research Field

天文学