Roger Chevalier 21/10/2009

University of Virginia, EE.UU.
Madrid, 21 de octubre de 2009 ll fraction of these particles probably energize the outer parts of the star, creating the explosion. These explosions have a variety of manifestations, primarily depending on the mass that is lost from the star in its evolution up to the explosion. A well studied example occurred in 1987; it was the only supernova visible to the naked eye in nearly 400 years. A small fraction of massive stars end their lives with bursts of high energy radiation from a jet that breaks out through the parent star. In these cases, rotation and magnetic fields are probably responsible for the explosion. The most distant object seen in the universe was of this type. The other major type of explosion involves the thermonuclear burning of a white dwarf star in a binary system. These explosions have played a crucial role in determining cosmological parameters.