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

Ia型超新星是目前被证明是测量暗能量状态方程的最强技术，也是直接测量哈勃常数H0的关键工具。然而，它们的祖先尚未确定，这暗示着潜在的不受控制的宇宙学偏见。宿主研究强调了SNE Ia与全球特性之间的相关性，这些特性的大小足以引起系统误差。在此背景下，Rigault等人。2013年的情况表明，通过分析SN的封闭环境，可以更好地理解这些偏见。在这里，我们提出了更进一步的建议，对非常近的SNE Ia的直接环境中的恒星种群进行了第一次研究。这应该会显著改善我们对SN-宇宙环境偏差的控制。

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.