Hypervelocity Supermassive Black Hole

[swansont]

29 minutes ago, Airbrush said:

Then that means about 0.1% of the mass, or one million solar masses, was converted into gravitational energy in a single pulse, like a cannon.  During the merger, it was NOT like a balloon rocketing around a room, changing directions as the air blasts out.

It means a lot more was converted, but any symmetrical emission would not impart a net impulse.

You are correct that it would not act like a balloon; there would be no air currents to make it behave so erratically. It would be more like discharging a fire extinguisher while sitting on an office chair (one with casters).

[Airbrush]

Would anyone like to calculate the number of megatons the blast would be from one million solar masses converted totally into energy?

Here are some numbers I found:  one megaton comes from 47 grams, so 21 megatons comes out of one kg, the sun's mass is about 2 x 10^30, so the explosion of the sun being totally converted into energy is (21 megatons) X 2 X 10^30 = 42 x 10^30 megatons.  The energy from exploding one million solar masses would be about 1,000,000 X 42 X 10^30 megatons = 42 X 10^36 megatons.  Did I get something wrong?  The number I found for 10^36 is "undecillion."  The directional impulse from the merger of quasar 3c186 was about 42 undecillion megatons.  That is how you fire a cannon ball weighing one billion solar masses to a speed of 4 million mph.

Edited February 20, 2019 by Airbrush

[MigL]

There is no 'explosion' or 'blast' involved.
( unless there is a third, non-BH member, involved in the merger, to cause EMR )
Just a seamless transition from mass-energy to momentum and gravitational radiation.

[Airbrush]

12 hours ago, MigL said:

There is no 'explosion' or 'blast' involved.
( unless there is a third, non-BH member, involved in the merger, to cause EMR )
Just a seamless transition from mass-energy to momentum and gravitational radiation.

So there would be no fire ball?  When one million solar masses are converted into energy of momentum and gravitational radiation, would the new black hole gobble up much of the energy released, except for a directional impulse from gravity waves?  So the gravity waves act like a rocket pushing from one side the huge mass to 4 million mph?  How much speed would the momentum contribute?  Would the momentum come from spin?  Suppose 2 tops are spinning on the floor, when they contact they violently bounce off each other.

Edited February 21, 2019 by Airbrush

[swansont]

48 minutes ago, Airbrush said:

So there would be no fire ball?  When one million solar masses are converted into energy of momentum and gravitational radiation, would the new black hole gobble up much of the energy released, except for a directional impulse from gravity waves?  So the gravity waves act like a rocket pushing from one side the huge mass to 4 million mph?  How much speed would the momentum contribute?

All of it. p = mv, after all

48 minutes ago, Airbrush said:

  Would the momentum come from spin?  Suppose 2 tops are spinning on the floor, when they contact they violently bounce off each other.

That's a conversion of rotational KE into translational KE. The momentum of the system would be unchanged.

[Strange]

1 hour ago, Airbrush said:

So there would be no fire ball? 

There is no matter to generate any electromagnetic radiation (apart from any small amount of gas and dust surrounding the back holes).

[Airbrush]

“We estimate that it took the equivalent energy of 100 million supernovae exploding simultaneously to jettison the black hole,” study co-author Stefano Bianchi, from Roma Tre University in Italy, said in a statement."

https://www.scientificamerican.com/article/gravitational-waves-send-supermassive-black-hole-flying/

Is 100 million supernovae exploding at once equivalent to converting one million solar masses to energy?  My guess would be that only a fraction of the energy was a directional impulse.  Much energy escaped in all directions, right?  How much of that energy was consumed by the black hole?

According to the paper provided by Mordred, the new quasar has the mass of about 3 billion solar masses.

 

[swansont]

2 hours ago, Airbrush said:

“We estimate that it took the equivalent energy of 100 million supernovae exploding simultaneously to jettison the black hole,” study co-author Stefano Bianchi, from Roma Tre University in Italy, said in a statement."

https://www.scientificamerican.com/article/gravitational-waves-send-supermassive-black-hole-flying/

Is 100 million supernovae exploding at once equivalent to converting one million solar masses to energy?  My guess would be that only a fraction of the energy was a directional impulse.  Much energy escaped in all directions, right?  How much of that energy was consumed by the black hole?

 According to wikipedia, energy released in a type 1a supernova is 1-2 x 10^44 J, which (dividing by c^2, which is about 10^17 m^2/s^2) would be around 2 x 10^27 kg, or the equivalent of 0.0005 - 0.001 solar masses. Meaning they are saying it's ~100k-200k solar masses, which is a factor of 5-10 smaller than my rough estimate. We're in the same ballpark.

This is energy shed by the black hole, along with all the other, symmetric gravitational radiation. There is no net consumption. This is a belch, not a swallow.