Le 03/01/2017 =E0 23:55, Phillip Helbig (undress to reply) a =E9crit :
Not sure what you mean about the antimatter.

For instance this:
(http://astronomynow.com/news/n1001/06essence/)
quote
As part of the ESSENCE supernova search, astronomers have discovered a
distant star that exploded when its centre became so hot that matter and
anti-matter particle pairs were created.

The star, known as Y-155, was once a magnificent 200 times the mass of
our Sun, but around seven billion years ago it became unstable, forcing
a runaway thermonuclear reaction that ended in a cataclysmic explosion
visible halfway across the Universe.
end quote

[[Mod. note -- While some antimatter was created during the star's
destruction, that does NOT say that the creation of that antimatter
*caused* the destruction. In fact, it didn't -- as the passage you
quoted says, a runaway thermonuclear reaction is what destroyed the
star. The (small amounts of) antimatter was "just" a byproduct.
-- jt]]