First Release of High-Redshift Superluminous Supernovae from the Subaru HIgh-Z SUpernova CAmpaign (SHIZUCA). I. Photometric Properties-猫眼课题宝

DOI：

10.3847/1538-4365/ab07c5

发表时间：

2018-01

期刊：

The Astrophysical Journal Supplement Series

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

T. Moriya;Masaomi Tanaka;N. Yasuda;Jiachen Jiang;Chien-Hsiu Lee;K. Maeda;T. Morokuma;K. Nomoto;R. Quimby;N. Suzuki;I. Takahashi;Masayuki Tanaka;N. Tominaga;M. Yamaguchi;S. Bernard;J. Cooke;C. Curtin;L. Galbany;S. González-Gaitán;G. Pignata;T. Pritchard;Y. Komiyama;R. Lupton

我们报告了我们在 Subaru HIgh-Z sSupernova CAmpaign 中首次发现的高红移超新星，这是使用 Subaru/Hyper Suprime-Cam (HSC) 进行的瞬态巡天。我们报告发现了三颗经光谱证实红移为 2.399 (HSC16adga)、1.965 (HSC17auzg) 和 1.851 (HSC17dbpf) 的超新星，以及两颗宿主星系光度红移分别为 3.2 (HSC16apuo) 和 4.2 (HSC17dsid) 的超新星候选者。在本文中，我们介绍了它们的光度特性，并在随附的论文中介绍了已确认的高红移超新星的光谱特性。已确认红移 z ≃ 2 的超新星的剩余紫外峰值星等接近 -21 星等，它们很可能是超发光超新星。 z ≃ 2 处发现的三颗超新星大致相当于具有泊松误差的~900 ± 520 Gpc−3 yr−1 的近似事件率，这与根据宇宙恒星形成历史外推局部率估计的总超光度超新星率一致。添加未经证实的超发光超新星候选者会增加事件发生率。我们的红移约为 3 和 4 的超光度超新星候选表明，超光度超新星的近似率约为 ∼400 ± 400 Gpc−3 yr−1 (z ∼ 3) 和 ∼500 ± 500 Gpc−3 yr−1 (z ∼ 4)，具有泊松误差。我们的初步结果证明了 HSC 发现高红移超新星的出色能力。

We report our first discoveries of high-redshift supernovae from the Subaru HIgh-Z sUpernova CAmpaign, the transient survey using Subaru/Hyper Suprime-Cam (HSC). We report the discovery of three supernovae at the spectroscopically confirmed redshifts of 2.399 (HSC16adga), 1.965 (HSC17auzg), and 1.851 (HSC17dbpf), and two supernova candidates with the host galaxy photometric redshifts of 3.2 (HSC16apuo) and 4.2 (HSC17dsid), respectively. In this paper, we present their photometric properties, and the spectroscopic properties of the confirmed high-redshift supernovae are presented in the accompanying paper. The supernovae with the confirmed redshifts of z ≃ 2 have the rest-ultraviolet peak magnitudes close to −21 mag, and they are likely superluminous supernovae. The discovery of three supernovae at z ≃ 2 roughly corresponds to the approximate event rate of ∼900 ± 520 Gpc−3 yr−1 with Poisson error, which is consistent with the total superluminous supernova rate estimated by extrapolating the local rate based on the cosmic star formation history. Adding unconfirmed superluminous supernova candidates would increase the event rate. Our superluminous supernova candidates at the redshifts of around 3 and 4 indicate the approximate superluminous supernova rates of ∼400 ± 400 Gpc−3 yr−1 (z ∼ 3) and ∼500 ± 500 Gpc−3 yr−1 (z ∼ 4) with Poisson errors. Our initial results demonstrate the outstanding capability of HSC to discover high-redshift supernovae.

First Release of High-Redshift Superluminous Supernovae from the Subaru HIgh-Z SUpernova CAmpaign (SHIZUCA). I. Photometric Properties

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