PMAS Observing Campaign at Calar Alto 3.5m Telescope:Local host properties of nearby type Ia supernovae

Ia型超新星（SNe Ia）是当今最强的测量暗能量状态方程的技术，也是直接测量哈勃常数参数H0的关键工具。然而，它们的祖先尚未确定，这表明潜在的不受控制的宇宙学偏见。最近的研究已经强调了Ia超新星与其整体性质之间的相关性，这些性质的大小足以引起系统误差。在这种情况下，Rigault等人（2013年）证明，分析SN的封闭环境可以更好地理解这些偏倚。在这里，我们提出更进一步，进行第一次研究的恒星人口的直接环境中非常接近SNe Ia。这将大大提高我们对SN宇宙学环境偏差的控制。

Type Ia supernovae (SNe Ia) are today the strongest demonstrated technique for measuring the dark energy equation of state and a key tools in the direct measurement of the Hubble constant parameter H0. However, their progenitors are as yet undetermined, which suggests potential uncontrolled cosmological biases. Hosts studies have highlighted correlation between SNe Ia and global properties sufficient in size to induce systematic errors. In this context, Rigault et al. 2013 demonstrated that analyzing the close environment of the SN enabled better understanding of those biases. Here, we offer to go a step further by conducting the first study of the stellar populations in the direct environment of very nearby SNe Ia. This should significantly improve our control on SN-cosmological environmental biases.