First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
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DOI：
10.3847/2041-8213/ab04fa
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发表时间：
2019-02-20
影响因子：
7.9
通讯作者：
Zhang, Y.
中科院分区：
文献类型：
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作者：
Abbott, T. M. C.;Allam, S.;Zhang, Y.
我们利用暗能量调查超新星计划（DES-SN）对Ia型超新星（SNe Ia）的测量，提出了第一个宇宙学参数约束。分析使用了207个经光谱确认的SNe的子样本。DES-SN前三年的Ia，结合文献中122个SNe的低红移样本。我们的“DES-SN3YR”是由这329个SNe产生的。Ia是基于SN的一系列配套分析和改进。在发现，光谱选择，光度测定，校准，距离偏差校正，和评估系统的不确定度。对于平坦Lambda CDM模型，我们发现物质密度Omega(m) = 0.331 +/- 0.038。对于平面wCDM模型，并结合我们的SN。在宇宙微波背景（CMB）的约束下，我们发现了一个暗能量状态方程w = -0.978 +/- 0.059, Omega(m) = 0.321 +/- 0.018。对于平面w(0)w(a)CDM模型，并结合SN探头。在Ia、CMB和重子声学振荡中，我们发现w(0) = -0.885 +/- 0.114, w(a) = -0.387 +/- 0.430。这些结果与宇宙常数和先前使用SNe的约束是一致的。Ia（万神殿，JLA）。
We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207 spectroscopically confirmed SNe. Ia from the first three years of DES-SN, combined with a low-redshift sample of 122 SNe from the literature. Our "DES-SN3YR" result from these 329 SNe. Ia is based on a series of companion analyses and improvements covering SN. Ia discovery, spectroscopic selection, photometry, calibration, distance bias corrections, and evaluation of systematic uncertainties. For a flat Lambda CDM model we find a matter density Omega(m) = 0.331 +/- 0.038. For a flat wCDM model, and combining our SN. Ia constraints with those from the cosmic microwave background (CMB), we find a dark energy equation of state w = -0.978 +/- 0.059, and Omega(m) = 0.321 +/- 0.018. For a flat w(0)w(a)CDM model, and combining probes from SN. Ia, CMB and baryon acoustic oscillations, we find w(0) = -0.885 +/- 0.114 and w(a) = -0.387 +/- 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe. Ia (Pantheon, JLA).