论文标题
使用超小超新星的第一个哈勃图和宇宙学约束
The first Hubble diagram and cosmological constraints using superluminous supernova
论文作者
论文摘要
我们将超浮肿超新星（SLSNE）的第一个哈勃图呈现到两个的红移，以及对物质密度的约束，$ω_ {\ rm m m} $和dark-energy-n-State参数，$ W（\ equiv P/ρ）$。我们基于光曲线和光谱质量削减，建立了20个具有宇宙学有用的SLSNE〜I样本。我们与以前的工作相比，我们证实了峰值下降SLSN〜I标准化关系的鲁棒性，并改进了拟合技术。然后，我们通过上述标准化来解决SLSN模型，通过从协方差矩阵计算的$χ^2 $最小化，该矩阵包括统计和系统的不确定性。对于空间平面$λ$ CDM宇宙学模型，我们发现$ω_ {\ rm m} = 0.38^{+0.24} _ { - 0.19} $，RMS为0.27 mag，用于距离Moduli的残差。对于$ W_0W_A $ CDM宇宙学模型，将Slsne〜i添加到由Planck温度和IA Supernovae型组成的“基线”测量中，导致$ W_0 $和$ W_A $ 4 \％的约束的限制很小。我们对未来调查进行了868和492 SLSNE I（取决于所使用的配置）的模拟，并表明该样本可以在均具有相同精确度（仅考虑统计不确定性的统一$λ$ CDM模型）中提供宇宙学的限制，这与当前使用类型的ia supernovae相同，同时提供2-3个元素的改进，以供2-3个元素进行分解。 $ W_0 $和$ W_A $。本文代表了超小型超新星宇宙学的概念验证，并证明它们可以在高红移（$ z> 1 $）宇宙中提供独立的宇宙学测试。
We present the first Hubble diagram of superluminous supernovae (SLSNe) out to a redshift of two, together with constraints on the matter density, $Ω_{\rm M}$, and the dark energy equation-of-state parameter, $w(\equiv p/ρ)$. We build a sample of 20 cosmologically useful SLSNe~I based on light curve and spectroscopy quality cuts. We confirm the robustness of the peak decline SLSN~I standardization relation with a larger dataset and improved fitting techniques than previous works. We then solve the SLSN model based on the above standardisation via minimisation of the $χ^2$ computed from a covariance matrix which includes statistical and systematic uncertainties. For a spatially flat $Λ$CDM cosmological model, we find $Ω_{\rm M}=0.38^{+0.24}_{-0.19}$, with a rms of 0.27 mag for the residuals of the distance moduli. For a $w_0w_a$CDM cosmological model, the addition of SLSNe~I to a `baseline' measurement consisting of Planck temperature together with type Ia supernovae, results in a small improvement in the constraints of $w_0$ and $w_a$ of 4\%. We present simulations of future surveys with 868 and 492 SLSNe I (depending on the configuration used) and show that such a sample can deliver cosmological constraints in a flat $Λ$CDM model with the same precision (considering only statistical uncertainties) as current surveys that use type Ia supernovae, while providing a factor 2-3 improvement in the precision of the constraints on the time variation of dark energy, $w_0$ and $w_a$. This paper represents the proof-of-concept for superluminous supernova cosmology, and demonstrates they can provide an independent test of cosmology in the high-redshift ($z>1$) universe.
