Some of the most powerful explosions in the universe has become more diversified.
Astronomers have supernova are divided into two categories: the first category La supernova was hypothesized to be completely collapse from a white dwarf star; second, LB and LC supernovae are thought to occur superstar Center collapse when the explosion.
Now, astronomers say, was initially thought to be an unusual type la supernova in exploding stars form, is actually a different type of supernova. This stellar explosion called the lax supernova, the energy released is about La supernova 1%~50%.
Moreover, there are signs that, in many cases, some of the stars of the remaining part of the initial outbreak will survive in the. Like the La supernova (but different and smaller, known as the star of ordinary exploding stars), the presence of hydrogen did not show lax in stellar spectra.
The 25 stars are most shared more than 25 different characteristics -- the stars may not only look the same, but also similar in physical properties.
The researchers in the journal astrophysics forthcoming "" (The Astrophysical Journal) and its online edition reported the results of this study.
Lax supernova were probably formed in a binary system -- the white dwarf a dense, rich in carbon and oxygen (figure left center position) take resources from its rich helium partner there, culminating in the surface area of poly enough quality and caused the explosion. Astronomers may rarely lax supernova found only, this is due to their weak signal, and not because of less number: team reasoned that, every 100 La supernova, of which about 31 is lax supernova.