Does Betelgeuse supernova generate a black hole?

On Jun 17, 1:00*pm, David Spain wrote:
To answer your question, Betelgeuse is certainly close to the limit
currently believed to be on the order of 20 Solar masses.

But the exact process of how a black hole is formed is not well understood,
and therefore puts a limit on how accurately an outcome can be predicted.

I suspect a lot of what happens will be due to the fusion sequence it follows
along with the amount of mass shed vs imploded at supernova.

The 3rd reference in the wikipedia article you cite:

http://www.astro.illinois.edu/~jkale...etelgeuse.html

says:

/quote

Whatever the actual numbers, Betelgeuse is clearly a highly evolved star, one
whose central hydrogen fuel supply has run out. As a result, the core
contracted into a hot dense state, and the outer portions swelled outward.. We
do not really know the star's condition at the moment, but the odds are that
it is now in the process of fusing helium into carbon and oxygen in its
core. From theory, its initial mass should have fallen somewhere between 12
and about 17 times that of the Sun which suggests that the core will fuse
elements through neon, magnesium, sodium, and silicon all the way to iron.. It
will then collapse, and Betelgeuse will blow up as a supernova, most likely
leaving a compact neutron star about the size of a small town behind. If it
were to explode today, it would become as bright as a crescent Moon, would
cast strong shadows on the ground, and would be seen easily in full daylight.

/endquote

We should know the answer within 10 centuries, if you're planning on hanging
around that long.... :-)

Dave

It's losing diameter or perhaps volume at 1% per year, having lost 15%
thus far would ten to suggest that within 50 years there should be the
expected helium flashover unless it flares back up before once again
shrinking by 1%/year. This helium flashover could take place within
ten years, but I'm thinking 40+ years would represent a 55% shrinkage
that should indicate the last volume of its hydrogen is nearly spent.

~ BG