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pnjabiloafer
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i was just wondering, what would happen when two GIGANTIC black holes collide (Andromeda and mIlky Way) I mean, which one would suck which one? If they do collide and become one, how will that be possible?
pnjabiloafer said:i was just wondering, what would happen when two GIGANTIC black holes collide (Andromeda and mIlky Way) I mean, which one would suck which one? If they do collide and become one, how will that be possible?
pnjabiloafer said:another point i wanted to get cleared was, if stars are just balls of gas, then that would mean, when two galaxies collide, there isn't much explosion, just all the stars merging with each other i suppose. right?
chroot said:When two black holes collide, they simply merge into one.
If the galaxies have significant gas (and dust) clouds, then a collision/merger will produce spectacular fireworks - while the stars will simply pass each other by (with an exception of ~1 in a million), the gas clouds will collide, creating monster shock waves in the gas. In turn, this will trigger an intense burst of new star formation (as Phobos said), with quite a few massive stars that will die quickly and produce supernovae ... further heating and compressing the gas, and triggering yet more fireworks.pnjabiloafer said:another point i wanted to get cleared was, if stars are just balls of gas, then that would mean, when two galaxies collide, there isn't much explosion, just all the stars merging with each other i suppose. right?
chroot said:And no, a quasar is just an active galaxy -- a juvenile galaxy whose primordial black hole is still swallowing lots of matter in the core. As the galaxy gets older it quiets down.
- Warren
Perhaps you're thinking of pulsars?pnjabiloafer said:i always thought that quasars were HUGE stars, spinning at great speeds. And isn't it quasars which seems to "blink" many times in a second? I am surprised to know, galaxies "blink" and turn that fast. Well, i guess that is what this forum is for, learning new things.
chroot said:Nothing says black holes have to be moving at near light speed to merge; in fact, they're normally be moving much less than light speed. The resulting black hole is actually less massive than the sum of its parts.
And no, a quasar is just an active galaxy -- a juvenile galaxy whose primordial black hole is still swallowing lots of matter in the core. As the galaxy gets older it quiets down.
- Warren
No. Matter does not have be traveling at light speed to cross the event horizon. Imagine you had a rocket that was capable of producing enough thrust to counter the force of gravity from a nearby black hole. Imagine that the rocket is initially stationary with respect to the black hole, its engines firing to counter the black hole's gravitational force. If you shut the engine off for a few minutes, you'll gain a few meters/second downward velocity. If you then turn the engine back up to full thrust, you won't accelerate anymore (since again the net force will be zero). You'll slowly fall into the black hole, maintaining that few meters/second the whole way down.ray b said:I thought the gravity of a BH would accellerate infalling matter to near light speed, at such speed the mass increases, so the impact energy is much higher then the rest mass also time is streached by the high speeds
Several million solar masses of material fall into it.if no mass increase effect how do they get a multi million solar mass BH to start with
You might be surprised that two magnets weigh less when stuck together than when pulled apart. When you pull the magnets apart, you add energy to the system, which manifests itself as mass. Similarly, four hydrogen nuclei weigh more than the helium nucleus formed by their fusion.and how could mass be less then the two starting masses as stuff cannot excape a black hole
You are incorrect. This is not the situation in many galaxies at all. Most galaxies have only a single black hole at their centers.on QUASARs my guess is they are TWO or more black holes moving very fast
inside each others dust disks eating huge amounts of matter at a very high rate in the final dance before the collision and after impact the show is over
chroot said:No. Matter does not have be traveling at light speed to cross the event horizon. Imagine you had a rocket that was capable of producing enough thrust to counter the force of gravity from a nearby black hole. Imagine that the rocket is initially stationary with respect to the black hole, its engines firing to counter the black hole's gravitational force. If you shut the engine off for a few minutes, you'll gain a few meters/second downward velocity. If you then turn the engine back up to full thrust, you won't accelerate anymore (since again the net force will be zero). You'll slowly fall into the black hole, maintaining that few meters/second the whole way down.
chroot said:You are incorrect. This is not the situation in many galaxies at all. Most galaxies have only a single black hole at their centers.
- Warren
quite so, if the falling object had - relative to the BH - exactly zero transverse speed to start with. Since that's extremely rare, nothing will fall straight into a BH, rather spiral in. On its way it will likely encounter all manner of things to slow it down - other matter spiralling in, photons, debris from collisions, ...ray b said:yes BUT nothing falls slowly into the Earth in a much much smaller gravity well and I am unaware of any brakes on a BH esp one falling into a multi-million solar mass BH
a few meter /per second may be true for a rest mass at an event horizon for the first second, over a few minutes no as seconds add up BUT the pair of black holes willnot be at rest or slow at that point
what is the ratio of excape V to infalling V for a BH
if a few solar mass BH has a excape V of greater than light speed does not a bigger one have a higher excape speed and a higher accelleration do to G tooo
If you have any observational results showing that quasars are, in fact, binary SMBH, please share them with us.you have been in a quasar resently?? yes many galaxies have quite centers and a single black hole at their centers, now, BUT they are NOT QUASARs, now,
some strange event causes the quazar and then it ends
a pair or more of BHs coming together is my BEST GUESS
and once they go inside the EH the show is over
There are plenty of 'small quasars', they're called (variously) BL Lac objects, Seyfert galaxies, and AGN galaxies.if simple dust falling into a BH could power a quasar then there should be more smaller quasars
A Gigantic Black Hole Collision occurs when two supermassive black holes at the center of galaxies merge together, resulting in an even larger black hole. This phenomenon is a rare and spectacular event in the universe.
Scientists use data from telescopes and other instruments to track the movement of galaxies in the universe. By studying the gravitational pull and trajectories of galaxies, they can predict when and how galaxies, such as the Andromeda and Milky Way, will collide.
During the collision, the black holes will release a massive amount of energy and radiation, which could disrupt the orbits of planets and other bodies in our solar system. However, it is unlikely that the collision will directly affect Earth or our sun.
The merger process between Andromeda and Milky Way is estimated to take around 4 billion years. This is a relatively long timescale compared to the lifespan of the universe.
The Gigantic Black Hole Collision between Andromeda and Milky Way will provide scientists with valuable insights into the behavior of supermassive black holes, the structure and evolution of galaxies, and the overall structure and fate of the universe. It will also help us understand the role of black holes in shaping our universe.