Re: Hypernova

From: Rene Tschaggelar (none_at_none.net)
Date: 06/02/04 

Date: Wed, 02 Jun 2004 22:50:27 +0200

Ed Keane III wrote:

> "Sam Wormley" <swormley1@mchsi.com> wrote in message
> news:40BE0234.DB2CEDA6@mchsi.com...
>
>>Geech wrote:
>>
>>>In a galaxy not so far away - only 25 million light-years - astronomers
>
> have
>
>>>found what looks like are the remnants of strange celestial explosions
>>>called hypernovae. "Hypernovae are possibly the most powerful explosions
>
> [snip]
>
> According to theory hypernovae are created by Type I giant low metallicity
> stars that are so large that the interior collapses into a black hole before
> the rest of the star is effected. The nuclear winds that overcome the
> gravity
> of a large enough star are dependant on materials that are heavier than
> hydrogen and helium that had not been created when these first generation
> stars formed.
>
> Why are nuclear winds metallicity dependant? Do nuclear winds contain
> particles from heavier elements or are they radiation that has higher energy
> from heavier particles?

As I understood, metalls in stars lower the fusion temperature due to
massive self absorption by the many possible spectral lines.
Meaning the first stars with little to no metalls required temperatures
orders of magnitues higher to start fusion.

Rene 

-- 
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
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