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arXiv 0903.3772astro-ph.SR
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超新星1993 J和2003 gd前身星的消失

The Disappearance of the Progenitors of Supernovae 1993J and 2003gd

Justyn R. Maund, Stephen J. Smartt

摘要:

使用哈勃太空望远镜(HST)和双子座望远镜的图像,我们确认了两个II型超新星(SNe)的祖先的消失,并评估了与它们相关的其他恒星的存在。我们发现SN 2003 gd的前身星M-超巨星在SN位置已经消失,并利用图像减影技术测定了它的内禀亮度。SN 1993 J的前身K-超巨星也不再存在,但它的B-超巨星双星伴星仍然被观测到。祖先的消失证实了这两颗超新星是由红超巨星产生的。

英文摘要:

Using images from the Hubble Space Telescope (HST) and the Gemini Telescope we confirm the disappearance of the progenitors of two Type II supernovae (SNe), and evaluate the presence of other stars associated with them. We find that the progenitor of SN 2003gd, an M-supergiant star, is no longer observed at the SN location, and determine its intrinsic brightness using image subtraction techniques. The progenitor of SN 1993J, a K-supergiant star, is also no longer present, but its B-supergiant binary companion is still observed. The disappearance of the progenitors confirms that these two SNe were produced by Red Supergiants.

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