The peculiar type Ia SN 1991T : detonation of a white dwarf ?

摘要: SN 1991T was a peculiar object whose premaximum optical spectrum did not resemble that of any known supernova; it appears to have been dominated by lines iron-group elements. Near maximum brightness, however, intermediate-mass elements slowly appeared, and the began Type Ia supernovae (SNs Ia). With time, spectral similarity classical SNs grew progressively stronger. Two months after explosion, once again appeared almost identical typical