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Asteroids might spark supernovas

机译:小行星可能会激发超新星

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A few well-aimed asteroids might be all it takes to make a star explode. Rocky debris in the atmosphere of a white dwarf, the core of a long dead star, could trigger an explosion known as a type la supernova. The proposal, reported online February 1 at arXiv.org, suggests a new way to create this type of supernova, whose origins are debated. While the mechanism that might destroy the white dwarf isn't clear, "the idea isn't pure speculation," says lead author Rosanne Di Stefano of the Harvard- Smithsonian Center for Astrophysics. The atmospheres of many of these stars are laced with elements such as carbon and silicon that should have sunk deep into the star. Since researchers can see these atoms, there must be a steady supply of material, most likely from asteroids that wander too close.
机译:要使一颗恒星爆炸,可能只需要一些瞄准良好的小行星。白矮星大气中的岩石碎片,是一颗长死恒星的核心,可能引发称为超新星型的爆炸。该提议于2月1日在线发布在arXiv.org上,提出了一种新的方式来制造这种类型的超新星,其起源尚有争议。哈佛-史密森尼大学天体物理学中心的主要作者罗桑·迪·史蒂芬诺说,虽然可能破坏白矮星的机制尚不清楚,但“这个想法并不是纯粹的推测”。其中许多恒星的大气中都充满了碳和硅等元素,这些元素本应沉入恒星的深处。由于研究人员可以看到这些原子,因此必须有稳定的物质供应,最有可能的原因是距离太近的小行星。

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