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Thread: Super massive black hole formation - mechanism?

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    Default Super massive black hole formation - mechanism?



    Their explanation ranks as BLHM (borderline headache material) for me.

    "Recent discoveries of these super-massive black holes located 13 billion light years away, corresponding to when the universe was just five per cent of its present age, pose a serious challenge to the theory of black hole formation and evolution. The physical mechanisms that form black holes and drive their growth are poorly understood."

    https://phys.org/news/2017-09-supers...-left-big.html
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    Default Re: Super massive black hole formation - mechanism?

    I think the article is unclear. I'll avoid headaches and read the paper later.
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    Default Re: Super massive black hole formation - mechanism?

    Quote Originally Posted by not_Fritz_Argelander View Post
    I think the article is unclear. I'll avoid headaches and read the paper later.
    No soap. Pawned article and no arXiv preprint.

    I think though looking at the abstract that it sheds light on what the simulation purports....

    The origin of super-massive black holes in the early universe remains poorly understood. Gravitational collapse of a massive primordial gas cloud is a promising initial process, but theoretical studies have difficulty growing the black hole fast enough. We report numerical simulations of early black hole formation starting from realistic cosmological conditions. Supersonic gas motions left over from the Big Bang prevent early gas cloud formation until rapid gas condensation is triggered in a protogalactic halo. A protostar is formed in the dense, turbulent gas cloud, and it grows by sporadic mass accretion until it acquires 34,000 solar masses. The massive star ends its life with a catastrophic collapse to leave a black hole—a promising seed for the formation of a monstrous black hole.
    Essentially the humongous protostar is force fed mass by supersonic streams of matter that overcome the Eddington limit. (The Eddington limit says that stars more than 100-300 solar masses (depending on composition) are unstable to mass loss driven by radiation pressure.) So the supersonic flow can overcome Eddington is how I would describe the result. The other amusing bit is that the center of mass of DM is different from that of baryonic matter.

    Speculation: the dark versus normal matter offset might be a good explanation for how DM galaxies like Dragonfly 44 get made.

    MONDophiles repent! The hour of reckoning has been at hand for many years!
    Sorry. Just could not apply discipline here....

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    Default Re: Super massive black hole formation - mechanism?

    Quote Originally Posted by not_Fritz_Argelander View Post
    No soap. Pawned article and no arXiv preprint.
    Should read

    No soap. Paywalled article and no arXiv preprinT.
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    Default Re: Super massive black hole formation - mechanism?

    n_FA, I can sometimes get around a sundry paywall with my work desktop at the U. I will try to make a pdf.
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    Default Re: Super massive black hole formation - mechanism?

    Quote Originally Posted by kanadalainen View Post
    n_FA, I can sometimes get around a sundry paywall with my work desktop at the U. I will try to make a pdf.
    Thanks.

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    Default Re: Super massive black hole formation - mechanism?

    Long-distance life rafting | Science

    If you look at the bottom of this collage, there is a short summary of this topic.

    I receive Science, and will scan it when snail mail delivers it.
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    Default Re: Super massive black hole formation - mechanism?

    Here's something to chew on in the meantime:

    Sloshing, supersonic gas may have built the baby universe
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    Default Re: Super massive black hole formation - mechanism?

    Wow. So 14 billion years ago, something huge ate Taco Bell...
    Bryan

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    Default Re: Super massive black hole formation - mechanism?

    Quote Originally Posted by bladekeeper View Post
    Wow. So 14 billion years ago, something huge ate Taco Bell...
    Are you making a suggestion that the supersonic flows resulted from flatulence?

    Is it time to tell a story involving a popular chicken sandwich chain and a withering case of norovirus? It's quite colorful projectiles? Maybe not.....

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