论文标题
IA型超新星的环境在光谱中具有不同的Si II相对宽度的不同
The environments of Type Ia supernovae with different relative equivalent width of Si II feature in their spectra
论文作者
论文摘要
尽管IA型超新星在许多天体物理领域非常重要，例如在宇宙学中，它们的爆炸机制和祖细胞系统尚不清楚。在物理学中，SI II 635.5 nm吸收特征的相对等效宽度（REW）反映了超新星喷射中硅的速度间隔，然后可能会对SNE IA的爆炸机制提供约束。在本文中，我们根据其基于SI II II 635.5 nm吸收线的REW将SNE IA分为宽线（BL）和正常线（NL）子样本，并发现BL SNE IA的亮度比NL的亮度比NL具有淡淡的亮度，这可能是由于其不同的金属性而产生的。但是，基于对两个子样本环境的像素统计研究，我们没有发现BL和NL SNE IA之间的环境有任何显着的潜在差异，这意味着SNE IA的爆炸机制可以独立于其祖先种群。
Although type Ia supernovae are so important in many astrophysical field, e.g. in cosmology, their explosion mechanism and progenitor system are still unclear. In physics, the relative equivalent width (REW) of the Si II 635.5 nm absorption feature reflects the velocity interval of silicon in the supernova ejecta and then may provide constraints on the explosion mechanism of SNe Ia. In this paper, we divide the SNe Ia into broad line (BL) and normal line (NL) subsamples based on their REW of Si II 635.5 nm absorption lines around maximum light, and find that the BL SNe Ia have a dimmer mean brightness than NL ones, which possibly results from their different metallicities. However, based on the pixel statistics study on the environments of two subsamples, we do not find any significant potential difference on the environments between BL and NL SNe Ia, which implies that the explosion mechanism of SNe Ia could be independent of their progenitor populations.
