SN 2009js at the Crossroads between Normal and Subluminous Type II P Supernovae : Optical and Mid-infrared Evolution
SN 2009js at the Crossroads between Normal and Subluminous Type II P Supernovae : Optical and Mid-infrared Evolution
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SN 2009js 处于普通 II P 型超新星和亚光度 II P 型超新星之间的十字路口：光学和中红外演化
DOI：
10.1088/0004-637x/767/2/166
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
R. Itoh
中科院分区：
文献类型：
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作者：
P. Gandhi;M. Yamanaka;M. Tanaka;T. Nozawa;K. S. Kawabata;I. Saviane;K. Maeda;T. J. Moriya;T. Hattori;M. Sasada;R. Itoh
我们对NGC 918中的SN 2009js进行了研究。多波段金田光学测光覆盖的第一个120天显示的源是一个IIP型SN。变红主要是由于我们的银河系。爆炸后一年的测光与新技术望远镜和斯巴鲁光谱16天后发现都意味着一个很好的匹配与充分研究的亚发光SN 2005cs。SN 2009js的平台相光度和平台持续时间与中等光度的IIP SN 2008in更相似。因此，SN 2009js与次光度和中等光度超新星（SNe）都有相同的特徴。其放射性尾光度介于SN 2005cs和SN 2008in之间，而其准热光度从峰值到平台（用新定义的参数Δlog量化）逐渐下降
We present a study of SN 2009js in NGC 918. Multi-band Kanata optical photometry covering the first∼ 120 days shows the source to be a Type IIP SN. Reddening is dominated by that due to our Galaxy. One-year-post-explosion photometry with the New Technology Telescope and a Subaru optical spectrum 16 days post-discovery both imply a good match with the well-studied subluminous SN 2005cs. The plateau-phase luminosity of SN 2009js and its plateau duration are more similar to the intermediate luminosity IIP SN 2008in. Thus, SN 2009js shares characteristics with both subluminous and intermediate luminosity supernovae (SNe). Its radioactive tail luminosity lies between SN 2005cs and SN 2008in, whereas its quasi-bolometric luminosity decline from peak to plateau (quantified by a newly defined parameter Δlog