A strong ultraviolet pulse from a newborn type Ia supernova
A strong ultraviolet pulse from a newborn type Ia supernova
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DOI：
10.1038/nature14440
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发表时间：
2015-05
期刊：
影响因子：
64.8
通讯作者：
Yi Cao;S. Kulkarni;D. Howell;D. Howell;A. Gal-yam;M. Kasliwal;S. Valenti;S. Valenti;J. Johansson;R. Amanullah;A. Goobar;J. Sollerman;F. Taddia;A. Horesh;I. Sagiv;S. Cenko;P. Nugent;P. Nugent;I. Arcavi;I. Arcavi;J. Surace;P. Wozniak;D. Moody;U. Rebbapragada;B. Bue;N. Gehrels
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文献类型：
--
作者：
Yi Cao;S. Kulkarni;D. Howell;D. Howell;A. Gal-yam;M. Kasliwal;S. Valenti;S. Valenti;J. Johansson;R. Amanullah;A. Goobar;J. Sollerman;F. Taddia;A. Horesh;I. Sagiv;S. Cenko;P. Nugent;P. Nugent;I. Arcavi;I. Arcavi;J. Surace;P. Wozniak;D. Moody;U. Rebbapragada;B. Bue;N. Gehrels
Ia 型超新星是碳氧白矮星的破坏性爆炸。尽管它们被凭经验用来测量宇宙距离，但它们的祖先的本质仍然是神秘的。主要的前身模型之一称为单简并通道，假设白矮星从伴星吸积物质，从而导致其中心压力和温度增加，引发热核爆炸。在这里，我们报告了使用雨燕太空望远镜对 Ia 型超新星爆炸后四天内强烈但减弱的紫外线发射的观测结果。这种发射与超新星喷射物质与伴星之间碰撞的理论预期一致，因此提供了某些 Ia 型超新星源自单一简并通道的证据。
Type Ia supernovae are destructive explosions of carbon-oxygen white dwarfs,. Although they are used empirically to measure cosmological distances,,, the nature of their progenitors remains mysterious. One of the leading progenitor models, called the single degenerate channel, hypothesizes that a white dwarf accretes matter from a companion star and the resulting increase in its central pressure and temperature ignites thermonuclear explosion,,. Here we report observations with the Swift Space Telescope of strong but declining ultraviolet emission from a type Ia supernova within four days of its explosion. This emission is consistent with theoretical expectations of collision between material ejected by the supernova and a companion star, and therefore provides evidence that some type Ia supernovae arise from the single degenerate channel.