Here is a better article:
http://physicsworld.com/cws/article/news/31801
It explains how such a star might have formed.
Quote:
|
While Woosley and colleagues have explained how such a bright supernova could occur, the question of how such a massive star could form in the first place has been addressed by Simon Portegies Zwart and Edward van den Heuvel of the University of Amsterdam in the Netherlands.
|
It also gives some idea of the time interval between the first two explosions.
Quote:
|
Woosley and colleagues tested their hypothesis by doing a computer simulation of the death of a star that began life at 110 solar masses, which suggested that such a star would explode twice in about 5.4 years and then collapse into a neutron star or black hole about 15 years after the first explosion.
|