Nomoto K, Iwamoto K, Kishimoto N
Department of Astronomy, University of Tokyo, Japan.
Science. 1997 May 30;276(5317):1378-82. doi: 10.1126/science.276.5317.1378.
Spectroscopic and photometric evidence indicates that Type Ia supernovae (SNe Ia) are the thermonuclear explosions of accreting white dwarfs. However, the progenitor binary systems and hydrodynamical models for SNe Ia are still controversial. The relatively uniform light curves and spectral evolution of SNe Ia have led to their use as a standard candle for determining cosmological parameters, such as the Hubble constant, the density parameter, and the cosmological constant. Recent progress includes the calibration of the absolute maximum brightness of SNe Ia with the Hubble Space Telescope, the reduction of the dispersion in the Hubble diagram through the use of the relation between the light curve shape and the maximum brightness of SNe Ia, and the discovery of many SNe Ia with high red shifts.
光谱和光度学证据表明，Ia型超新星（SNe Ia）是吸积白矮星的热核爆炸。然而，SNe Ia的前身双星系统和流体动力学模型仍存在争议。SNe Ia相对均匀的光变曲线和光谱演化使其被用作确定宇宙学参数（如哈勃常数、密度参数和宇宙常数）的标准烛光。最近的进展包括用哈勃空间望远镜校准SNe Ia的绝对最大亮度，通过利用SNe Ia光变曲线形状与最大亮度之间的关系减少哈勃图中的弥散，以及发现许多高红移的SNe Ia。
