Hypernovae and Gamma-Ray Bursts

被引：0
|
作者：
Ken’ichi Nomoto
Keiichi Maeda
Nozomu Tominaga
Takuya Ohkubo
Jinsong Deng
Paolo A. Mazzali
机构：
[1] University of Tokyo,Department of Astronomy, School of Science
[2] University of Tokyo,Research Center for the Early Universe, School of Science
[3] College of Arts and Sciences,Department of Earth Science and Astronomy
[4] University of Tokyo,undefined
[5] INAF-Osservatorio Astronomico,undefined
来源：
Astrophysics and Space Science | 2005年 / 298卷
关键词：
Gamma-Ray Bursts; supernovae; nucleosynthesis; extremely metal-poor stars;
D O I：
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中图分类号：
学科分类号：
摘要：
The nature of very energetic supernovae (hypernovae) is discussed. They are the explosive death of stars more massive than ~20–25M⊙, probably linked to the enigmatic Gamma-Ray Bursts. The optical properties of hypernovae indicate that they are significantly aspherical. Synthetic light curves and late-phase spectra of aspherical supernova/hypernova models are presented. These models can account for the optical observations of SNe 1998bw and 2002ap. The abundance patterns of hypernovae are characterized by large ratios (Zn, Co)/Fe and small ratios (Mn, Cr)/Fe, indicating a significant contribution of hypernovae to the early Galactic chemical evolution.
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页码：81 / 86
页数：5
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