Building a supermassive black hole in under a billion years

Building a supermassive black hole in under a billion years

http://arstechnica.com/science/2012/...billion-years/

"At the high end, these ultra-heavyweights did not have the sort of life
cycle we associate with stars in the current Universe. Modern stars find
a balance between the inward force of gravity and the outward pressure
driven by fusion, and can burn for billions of years. In these early
stars, gravity is so large that fusion never has a chance—they simply
collapse directly into a black hole that weighs in at around 200 times
the mass of the Sun. If enough of these formed in the heart of early
galaxies, mergers and a rapid accumulation of gas might be sufficient to
grow them rapidly".

On 03/08/2012 10:41 AM, Sam Wormley wrote:

Building a supermassive black hole in under a billion years

http://arstechnica.com/science/2012/...billion-years/


"At the high end, these ultra-heavyweights did not have the sort of life
cycle we associate with stars in the current Universe. Modern stars find
a balance between the inward force of gravity and the outward pressure
driven by fusion, and can burn for billions of years. In these early
stars, gravity is so large that fusion never has a chance—they simply
collapse directly into a black hole that weighs in at around 200 times
the mass of the Sun. If enough of these formed in the heart of early
galaxies, mergers and a rapid accumulation of gas might be sufficient to
grow them rapidly".



This is more than an article about just one possible mechanism for early
formation of supermassive blackholes. It suggests 3 possible mechanisms
for it. First mechanism is several 100+ solar mass stars in the early
universe collapsing to blackholes without going supernova, which would
probably preserve the majority of the mass of the progenitor stars,
these blackholes would then merge in the centers of these early
galaxies. Creating several 100 SM blackholes.

The second mechanism, is several 100+ solar mass stars still in the main
sequence, which merge while still on fire. These then merge into 1000 SM
blackholes.

Third mechanism, is a massive gas cloud immediately collapses into a
blackhole of millions of SM, without undergoing any fusion in the first
place. I think this is likely the most plausible mechanism. Or some
combinations of all of these mechanisms too.

Yousuf Khan

On Aug 3, 7:41*am, Sam Wormley wrote:
Building a supermassive black hole in under a billion years

http://arstechnica.com/science/2012/...massive-black-...

"At the high end, these ultra-heavyweights did not have the sort of life
cycle we associate with stars in the current Universe. Modern stars find
a balance between the inward force of gravity and the outward pressure
driven by fusion, and can burn for billions of years. In these early
stars, gravity is so large that fusion never has a chance they simply
collapse directly into a black hole that weighs in at around 200 times
the mass of the Sun. If enough of these formed in the heart of early
galaxies, mergers and a rapid accumulation of gas might be sufficient to
grow them rapidly".

Under ideal conditions, how fast can a planet like Earth or Venus be
constructed?

On 8/5/12 11:33 PM, Brad Guth wrote:
On Aug 3, 7:41 am, Sam Wormley wrote:
Building a supermassive black hole in under a billion years

http://arstechnica.com/science/2012/...massive-black-...

"At the high end, these ultra-heavyweights did not have the sort of life
cycle we associate with stars in the current Universe. Modern stars find
a balance between the inward force of gravity and the outward pressure
driven by fusion, and can burn for billions of years. In these early
stars, gravity is so large that fusion never has a chance they simply
collapse directly into a black hole that weighs in at around 200 times
the mass of the Sun. If enough of these formed in the heart of early
galaxies, mergers and a rapid accumulation of gas might be sufficient to
grow them rapidly".

Under ideal conditions, how fast can a planet like Earth or Venus be
constructed?


Planets of our solar system formed in 100 million years or less. You
can look this up on the web.


--
-Sam Wormley

On Aug 5, 9:53*pm, Sam Wormley wrote:
On 8/5/12 11:33 PM, Brad Guth wrote:









On Aug 3, 7:41 am, Sam Wormley wrote:
Building a supermassive black hole in under a billion years

http://arstechnica.com/science/2012/...massive-black-....

"At the high end, these ultra-heavyweights did not have the sort of life
cycle we associate with stars in the current Universe. Modern stars find
a balance between the inward force of gravity and the outward pressure
driven by fusion, and can burn for billions of years. In these early
stars, gravity is so large that fusion never has a chance they simply
collapse directly into a black hole that weighs in at around 200 times
the mass of the Sun. If enough of these formed in the heart of early
galaxies, mergers and a rapid accumulation of gas might be sufficient to
grow them rapidly".

Under ideal conditions, how fast can a planet like Earth or Venus be
constructed?

* *Planets of our solar system formed in 100 million years or less. You
* *can look this up on the web.

--
-Sam Wormley

Under ideal conditions, how fast can a planet like Earth or Venus be
constructed?

On 8/6/12 11:23 PM, Brad Guth wrote:
how fast can a planet like Earth or Venus be
constructed?

See:
http://scientopia.org/blogs/galactic...anets-to-form/


--
-Sam Wormley