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arXiv 1409.4429astro-ph.SRastro-ph.COastro-ph.HE
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作为可测量的蜡烛和高红移距离探测器的超亮超新星

Super Luminous Supernovae as standardizable candles and high redshift distance probes

Cosimo Inserra, Stephen J. Smartt

备注：
The authors regret that in the published version (2014, APJ, 796, 87) there were calculation errors in many of the values in Table 1 and in particular the important values for M(400) and the decline rates. The two main conclusions of the paper are unchanged, but the quantitative rms values are larger than previously reported
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摘要：

我们调查使用Ic型超亮超新星作为可测量的蜡烛和距离指示器。它们作为宇宙学探测器的吸引力来自于它们非凡的峰值光度、热黑体温度和明亮的静止帧紫外线发射。我们提出了一个样本的16个已发表的SLSN，从红移0.1到1.2，并计算准确的K-校正，以确定统一的幅度在两个合成的静止框架过滤器的中心波长在400 nm和520 nm。在400 nm处，我们发现它们的未校正的原始平均幅度的低散射，对于16个物体的完整样本，M（400）=-21.70。我们研究了它们的下降率和峰值强度之间的相关性，发现较亮的事件似乎下降得更慢。我们定义了一个$ΔM(30)$衰减关系。这将峰值幅度和30天内的下降相关联，并可以将离散度降低到0.25。我们进一步表明，M（400）似乎有很强的颜色依赖性。使用这种颜色速率衰减关系，可以根据样本选择找到0.19和0.26之间的低散射。然而，我们要提醒的是，目前只有8到10个天体有足够的数据来测试这种色率下降关系。我们的结论是，SLSN Ic是有前途的距离指标，在高红移的制度超出了可能与SNe Ia。虽然经验关系是令人鼓舞的，未知的祖系统，以及它们如何可能与红移的演变是一些关注。两个主要的测量不确定性是测试这些关系的低红移物体的数量有限，以及宿主星系内部的尘埃消光。

英文摘要：

We investigate the use of type Ic Super Luminous Supernovae as standardizable candles and distance indicators. Their appeal as cosmological probes stems from their remarkable peak luminosities, hot blackbody temperatures and bright restframe ultraviolet emission. We present a sample of sixteen published SLSN, from redshifts 0.1 to 1.2 and calculate accurate K-corrections to determine uniform magnitudes in two synthetic rest-frame filters with central wavelengths at 400nm and 520nm. At 400nm, we find a low scatter in their uncorrected, raw mean magnitudes with M(400)=-21.70 for the full sample of sixteen objects. We investigate the correlation between their decline rates and peak magnitude and find that the brighter events appear to decline more slowly. We define a $ΔM(30)$ decay relation. This correlates peak magnitude and decline over 30 days and can reduce the scatter to 0.25. We further show that M(400) appears to have a strong colour dependence. Using this colour rate decay relation, a low scatter of between 0.19 and 0.26 can be found depending on sample selection. However we caution that only eight to ten objects currently have enough data to test this colour rate decline relation. We conclude that SLSN Ic are promising distance indicators at high redshift in regimes beyond those possible with SNe Ia. Although the empirical relationships are encouraging, the unknown progenitor systems and how they may evolve with redshift are of some concern. The two major measurement uncertainties are the limited numbers of low redshift objects to test these relationships and internal dust extinction in the host galaxies.

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