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arXiv 1210.6909astro-ph.CO
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斯巴鲁深场中不寻常的长而明亮的光学瞬变

Unusual Long and Luminous Optical Transient in the Subaru Deep Field

Yuji Urata, Patrick P. Tsai, Kuiyun Huang, Tomoki Morokuma, Naoki Yasuda, Masaomi Tanaka, Kentaro Motohara, Masao Hayashi, Nobunari Kashikawa, Chun Ly, Matthew A. Malkan

摘要:

我们目前的观察SDF-05 M05,一个不寻常的光学瞬态发现在斯巴鲁深场(SDF)。在观测者坐标系中,瞬变的持续时间> ~800 d,观测期间的最大亮度在i'和z'波段达到约23 mag。暗宿主星系在深SDF图像的所有5个光学波段都被清楚地识别出来。主恒星的光度红移产生z~0.6,对应的最大绝对星等为~-20。这意味着这一事件在静止坐标系中以绝对星等亮于-19等约300 d的时间发光,这比典型的超新星和超亮超新星明显更长。我们观测期间的总辐射能量为1 × 10^51尔格。光变曲线和颜色演化与一些发光的IIn超新星勉强一致。我们认为,这一瞬变现象可能是一种独特的中等红移超新星。

英文摘要:

We present observations of SDF-05M05, an unusual optical transient discovered in the Subaru Deep Field (SDF). The duration of the transient is > ~800 d in the observer frame, and the maximum brightness during observation reached approximately 23 mag in the i' and z' bands. The faint host galaxy is clearly identified in all 5 optical bands of the deep SDF images. The photometric redshift of the host yields z~0.6 and the corresponding absolute magnitude at maximum is ~-20. This implies that this event shone with an absolute magnitude brighter than -19 mag for approximately 300 d in the rest frame, which is significantly longer than a typical supernova and ultra-luminous supernova. The total radiated energy during our observation was 1x10^51 erg. The light curves and color evolution are marginally consistent with some of luminous IIn supernova. We suggest that the transient may be a unique and peculiar supernova at intermediate redshift.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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