Lower limits on the Hubble constant from models of type Ia supernovae
Lower limits on the Hubble constant from models of type Ia supernovae
复制标题
DOI：
10.1051/0004-6361:20041630
复制
发表时间：
2004-10
影响因子：
6.5
通讯作者：
M. Stritzinger;B. Leibundgut
中科院分区：
文献类型：
--
作者：
M. Stritzinger;B. Leibundgut
通过将Ia型超新星的观测结果与现有最佳数值模型的结果相结合，我们独立于任何外部校准器来约束哈勃常数。我们发现H 0的绝对下限大于50 km s −1 Mpc −1。此外，我们还利用哈勃流中12颗Ia型超新星的紫外光变曲线绘制了哈勃图，并采用由一维和三维爆燃模拟得到的56 Ni的最可能值，分别得到H 0 ≥ 66 ± 8和≥78 ± 9 k m s-1 Mpc-1。我们的结果可能很难与最近文献中的讨论相一致，因为爱因斯坦-德西特宇宙似乎需要H 0·46 km s −1 Mpc −1才能符合宇宙微波背景的温度功率谱，并保持最古老恒星的年龄限制。
By coupling observations of type Ia supernovae with results obtained from the best available numerical mod- els we constrain the Hubble constant, independently of any external calibrators. We find an absolute lower limit of H0 > 50 km s −1 Mpc −1 . In addition, we construct a Hubble diagram with UVOIR light curves of 12 type Ia supernovae located in the Hubble flow, and when adopting the most likely values (obtained from 1-D and 3-D deflagration simulations) of the amount of 56 Ni produced in a typical event, we find values of H0 ≥ 66 ± 8a nd≥78 ± 9k m s −1 Mpc −1 , respectively. Our result may be difficult to reconcile with recent discussions in the literature as it seems that an Einstein-de Sitter universe requires H0 � 46 km s −1 Mpc −1 in order to fit the temperature power spectrum of the cosmic microwave background and maintain the age constraints of the oldest stars.