FREQUENTLY ASKED QUESTIONS (FAQs)
SO WHAT IS A QUATSTAR?
HOW DO YOU THINK A QUATSTAR CAME TO EXIST?
HOW CAN A QUATSTAR BE SO STABLE?
There's a property 'Jean's Mass' named after British physicist Sir James Jeans.
It occurs when the internal gas pressure of a body is not strong enough to
prevent gravitational collapse of a region filled with matter.
He considered the process of gravitational collapse within a gaseous cloud and
was able to show that, under appropriate conditions, a cloud, or part of one (note I am extrapolating this to a star) would become unstable and
begin to collapse when it lacked sufficient gaseous pressure support to balance the force of gravity.
So a mass of a cloud (or of a star) is stable for sufficiently small mass (at a given temperature and radius),
but once this critical mass is exceeded,
it will begin a process of runaway contraction until some other force can impede the collapse.
Likewise if the star's temperature and radius both were increased for a given star mass then the star itself can be more stable.
He derived a formula for calculating this critical mass as a function of its density and temperature.
So the greater the mass of the cloud (star), the smaller its size, and the colder its temperature,
the less stable it will be against gravitational collapse.
So in our case if a quasar's mass is held constant while star's temperature (surface and core) is made hotter and the star expands with a larger radius
then such a quasar could be more stable. Most stars in our own galaxy including our sun are now third generation stars (aka population 3).
Meanwhile the core of our galaxy has always existed there.
Clearly whatever's in the core is no ordinary object, for what could exist there for so long with a mass of at least 2 million suns? A supermassive blackhole.
Many astronomers now believe this supermassive blackhole at the core was once a quasar that blew away much of its gasses through its 2 jet lobes.
Over time it loses its brilliance and momentum so that eventually the galaxy evolves into
a whirlpool (like ours) with spiral arms guided by strong magnetic currents originating from the core.
In turn the core slowly retreats - sucking all the stars back into its supermassive blackhole.
So the core of all galaxies like ours has a supermassive blackhole that lives a very long time - longer than most stars. Eventually each may evaporate after feeding on its own galaxy of stars.
But I wonder for some rare giant galaxies - is there another similar scenario? What if there really is a visible star at its core?
In this case an enormous supermassive magnetar would be left over from the early universe - a Quatstar!
Such a star would have more mass (or comparable) than a typical quasar but also be far larger and hotter so that it can
remain stable and survive as a star living to be as old as the known universe.
Obviously like a blackhole, its mass can still increase by having a faster
rotation which causes it to suck in more mass from neighboring bodies and clouds.
But like a blackhole even though the quatstar is much larger than a quasar - it can still get
very tight for hot gasses to move about. And like all other stars, a quatstar can go
unstable. Massive hiccups/belches can occur where it emits powerful shockwaves streaming through
mainly its jet lobes. But these disturbances can be so great that it actually triggers the whole star to blow up as a massive ultranova.
It expels most of its layers leaving behind in its core - once again a supermassive blackhole.