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SUPERNOVA 2003ie WAS LIKELY A FAINT TYPE IIP EVENT

机译:SUPERNOVA 2003ie很像是一次失败的IIP事件

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We present new photometric observations of supernova (SN) 2003ie starting one month before discovery, obtained serendipitously while observing its host galaxy. With only a weak upper limit derived on the mass of its progenitor (25 M ☉) from previous pre-explosion studies, this event could be a potential exception to the "red supergiant (RSG) problem" (the lack of high-mass RSGs exploding as Type?IIP SNe). However, this is true only if SN2003ie was a Type?IIP event, something which has never been determined. Using recently derived core-collapse SN light-curve templates, as well as by comparison to other known SNe, we find that SN2003ie was indeed a likely Type?IIP event. However, with a plateau magnitude of ~ – 15.5 mag, it is found to be a member of the faint Type?IIP class. Previous members of this class have been shown to arise from relatively low-mass progenitors (12 M ☉). It therefore seems unlikely that this SN had a massive RSG progenitor. The use of core-collapse SN light-curve templates is shown to be helpful in classifying SNe with sparse coverage. These templates are likely to become more robust as large homogeneous samples of core-collapse events are collected.
机译:我们提出超新星(SN)2003ie的新光度学观测,即发现前一个月开始,是偶然发现的,同时观察了其宿主星系。由于以前的爆炸前研究仅得出其祖先质量的弱上限(<25 M☉),因此该事件可能是“红色超巨星(RSG)问题”(缺乏高质量物质)的潜在例外。 RSG爆炸为Type?IIP SNe)。但是,仅当SN2003ie是Type?IIP事件时才成立,这从未确定。使用最近导出的核心崩溃SN光曲线模板,以及与其他已知的SNe进行比较,我们发现SN2003ie确实确实可能是Type?IIP事件。但是,它的高原幅度为〜– 15.5 mag,是微弱的Type?IIP类的成员。该类别的先前成员已显示出来自相对较低质量的祖细胞(<12 M☉)。因此,这个SN似乎不可能拥有庞大的RSG祖细胞。结果表明,使用核塌陷SN光曲线模板有助于以稀疏覆盖范围对SNe进行分类。当收集核心崩溃事件的大量同质样本时,这些模板可能会变得更强大。

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