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| Yousuf Khan... |
 Posted: Fri Nov 06, 2009 4:45 pm |
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Astronomers Find New Type of Supernova - It involves helium and a white
dwarf - Softpedia
"Supernovae are the huge explosions that accompany the end of a massive
star's burning cycle. When the detonations occur, the outer layers over
the former core are violently thrown away, and the core itself may
collapse into a black hole, or into a neutron star, or simply a small,
helium-based star, known as a white dwarf. In precisely this type of
celestial bodies, long thought to be essentially uninteresting,
astronomers have recently discovered a new type of supernova. In this
instance, they explain, the helium on the surface of the white dwarf
simply detonates, Space reports. "
http://news.softpedia.com/news/Astronomers-Find-New-Type-of-Supernova-126260.shtml |
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| YKhan... |
| Posted: Sat Nov 07, 2009 6:42 am |
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On Nov 6, 4:45 pm, Yousuf Khan <bbb... at (no spam) spammenot.yahoo.com> wrote:
[quote]Astronomers Find New Type of Supernova - It involves helium and a white
dwarf - Softpedia
"Supernovae are the huge explosions that accompany the end of a massive
star's burning cycle. When the detonations occur, the outer layers over
the former core are violently thrown away, and the core itself may
collapse into a black hole, or into a neutron star, or simply a small,
helium-based star, known as a white dwarf. In precisely this type of
celestial bodies, long thought to be essentially uninteresting,
astronomers have recently discovered a new type of supernova. In this
instance, they explain, the helium on the surface of the white dwarf
simply detonates, Space reports. "http://news.softpedia.com/news/Astronomers-Find-New-Type-of-Supernova...
[/quote]
A different source of the story makes the implications more clear.
They've discovered a stage half-way between a Nova and a Type Ia
Supernova. In this case, a white dwarf isn't accumulating mass from a
companion red giant star, but from a companion smaller white dwarf.
Since it's harder to take away mass from another tightly-packed white
dwarf than it is to take it from a loose ball of gas like a red giant,
the primary white dwarf doesn't gather enough mass to completely
explode to smithereens in a full Type Ia supernova. But it does gather
enough mass to be more than just a Nova.
Yousuf Khan
New Type of Supernova Discovered
"According to Bildsten, a Type .Ia blast requires two white dwarfs of
unequal masses circling each other.
The more massive star is made of carbon and oxygen, while its
companion consists mostly of helium.
Gravity from the larger white dwarf slowly pulls helium from the
surface of its neighbor, and the siphoned gas builds up into a shell
around the star.
After tens of millions of years, that shell reaches a critical mass
threshold, at which point it detonates in a luminous but short-lived
explosion.
Since only the helium shell explodes, both white dwarfs remain intact
after the blast, and the cycle could potentially repeat. "
http://news.nationalgeographic.com/news/2009/11/091106-new-supernova-type.html |
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| gb... |
| Posted: Wed Nov 11, 2009 3:44 am |
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On Nov 6, 10:45 pm, Yousuf Khan <bbb... at (no spam) spammenot.yahoo.com> wrote:
[quote]Astronomers Find New Type of Supernova - It involves helium and a white
dwarf - Softpedia
"Supernovae are the huge explosions that accompany the end of a massive
star's burning cycle. When the detonations occur, the outer layers over
the former core are violently thrown away, and the core itself may
collapse into a black hole, or into a neutron star, or simply a small,
helium-based star, known as a white dwarf. In precisely this type of
celestial bodies, long thought to be essentially uninteresting,
astronomers have recently discovered a new type of supernova. In this
instance, they explain, the helium on the surface of the white dwarf
simply detonates, Space reports. "http://news.softpedia.com/news/Astronomers-Find-New-Type-of-Supernova...
[/quote]
It doesn't simply detonates.
The ice skating balerina spins up as the star is shrinking and
shrinking once it begins collapsing, focusing its energies toward a
catastrophic spinup reaction. |
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| gb... |
| Posted: Wed Nov 11, 2009 3:52 am |
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Guest
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On Nov 11, 2:44 pm, gb <gb6... at (no spam) yahoo.com> wrote:
[quote]On Nov 6, 10:45 pm, Yousuf Khan <bbb... at (no spam) spammenot.yahoo.com> wrote:
Astronomers Find New Type of Supernova - It involves helium and a white
dwarf - Softpedia
"Supernovae are the huge explosions that accompany the end of a massive
star's burning cycle. When the detonations occur, the outer layers over
the former core are violently thrown away, and the core itself may
collapse into a black hole, or into a neutron star, or simply a small,
helium-based star, known as a white dwarf. In precisely this type of
celestial bodies, long thought to be essentially uninteresting,
astronomers have recently discovered a new type of supernova. In this
instance, they explain, the helium on the surface of the white dwarf
simply detonates, Space reports. "http://news.softpedia.com/news/Astronomers-Find-New-Type-of-Supernova...
It doesn't simply detonates.
The ice skating balerina spins up as the star is shrinking and
shrinking once it begins collapsing, focusing its energies toward a
catastrophic spinup reaction.
[/quote]
The universe's most powerful explosion. Only bigger are electron or
neutron stars which are much sturdier in structure and much rarer. The
big bang might be a result of a collapsing electron or neutron star,
very rare. Energies inflate as this is not an energy based explosion,
but a gravity-spin, or gravity spinoff. Electromagnet star or nuclear
star spinoff produces nature's nuclear bomb or big bang. |
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