Solving the Equations of General Relativity for Colliding Black Holes

Final Burst Of Binary Black Hole

Still from an animation of the inspiral of a binary black hole with a 128:1 mass ratio showing the beginning of the final burst of gravitational waves. Credit: Carlos Lousto, James Healy, RIT

6 Comments on "Solving the Equations of General Relativity for Colliding Black Holes"

  1. Kathleen Phillips | November 9, 2020 at 5:14 am | Reply

    In a socially distancing earthbound conversation, I can only pray colliding black holes are indicative of the returning King of kings, Jesus.

  2. … one more wrong approach, the calculus would not stop at the Plank’s.
    What modern physics doesn’t want to understand is that it is not possible to find mathematical formula for every function in the world. In another words, the world is out of mathematical reach. There are way more wrong stuff.
    So, next time you try to tell me your physics dogma, there is no time for that, because it should be at true story.
    Yes, the truth is out there and you don’t wanna play outside of your little bubbles, because the bubbles tend to burst…

    • Torbjörn Larsson | November 10, 2020 at 3:05 pm | Reply

      Of course the world is out of mathematical reach, science is based on empiricism and we can’t axiomatize it, c.f. how we can’t do that for quantum field theory.

      It is easy for physics to stop before Planck energies, that is precisely that happens in black hole physics – it’s innate to quantum field theory based on observations of Planck’s constant, and applies to gravity.

      Why do you reify math? It is just a useful tool for science (and technology), itself useful tool(s) for society. But you can also do math without observation, while observational methodology was that got science started – not math.

  3. Torbjörn Larsson | November 10, 2020 at 2:54 pm | Reply

    ““These merged black holes can have speeds much larger than previously known,” Lousto said. “They can travel at 5,000 kilometers per second. They kick out from a galaxy and wander around the universe. That’s another interesting prediction.””

    Maybe, but that seems to happen for small black holes at ~ 1/4 mass ratio [their eq. 3 and fig. 4]. It would be odd if galaxies lost super massive central black holes often as galaxies merge and eventually the black holes merge at the center – we don’t seem to see that.

  4. … a weak spot, yes I know what is wrong, and I won’t fix it, because I am not a physicist. Some people just can’t leave it be, as it is, you know.
    A good duck sauce! …

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