Evidence for two distinct populations of type Ia supernovae  

出　　处：《Science Foundation in China》2013年第2期39-39,共1页中国科学基金（英文版）

摘　　要：Type Ia supernovae(SNe Ia)have been used as'standard candle'to measure extragalactic distance and have led to the discovery of accelerating expansion of the universe which was awarded the 2011 Nobel Prize in Physics.However,it is embarrassing that their physics and progenitor systems remain elusive till today.SNe Ia are believed to be the results of thermonuclear explosions of white dwarf stars close to the critical Chandrasekhar mass limit.Theoretically,the exploding white dwarf can reach that mass limitType Ia supernovae（SNe Ia）have been used as＂standard candle＂to measure extragalactic distance and have led to the discovery of accelerating expansion of the universe which was awarded the 2011 Nobel Prize in Physics.However,it is embarrassing that their physics and progenitor systems remain elusive till today.SNe Ia are believed to be the results of thermonuclear explosions of white dwarf stars close to the critical Chandrasekhar mass limit.Theoretically,

关 键 词：IA型超新星 诺贝尔物理学奖 IA超新星 证据 群体 钱德拉塞卡 河外星系 加速膨胀 

分 类 号：P145.3[天文地球—天体物理] O4-09[天文地球—天文学]