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Thread: the core of the Milky Way was formed by

  1. #1
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    Exclamation the core of the Milky Way was formed by



    eating globular clusters!

    How Did Our Galactic Nucleus Form?

    this is important to sort out but i don't see how it falsifies the gas collapse model. old stars become RR Lyrae variables. they don't need to remember that they were made in a globular cluster or as a field star in the core. you'd have to do more than this and show that the core had an age homogenous H-R diagram to clinch the point i think in favor of gas collapse and NOT globular cluster stripping.
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  3. #2
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    Default Re: the core of the Milky Way was formed by

    Ya, but where globular clusters came from?
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    Default Re: the core of the Milky Way was formed by

    Quote Originally Posted by Bigzmey View Post
    Ya, but where globular clusters came from?
    At the time of structure formation the temperature of the universe at the time gives the natural mass for gravitational collapse as globular cluster size. The Jeans mass for gravitational collapse at that epoch and the statistics of density fluctuations favors globular. You need dark matter to make galaxies but globular clusters need only normal baryonic matter.
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    Default Re: the core of the Milky Way was formed by

    Quote Originally Posted by not_Fritz_Argelander View Post
    At the time of structure formation the temperature of the universe at the time gives the natural mass for gravitational collapse as globular cluster size. The Jeans mass for gravitational collapse at that epoch and the statistics of density fluctuations favors globular. You need dark matter to make galaxies but globular clusters need only normal baryonic matter.
    This is actually a hugely important point. Some folks insist that the lack of evidence of DM in globulars should count against the DM idea even so far as to falsifying it. It shouldn't. Claiming it should is simply a technical mistake.

    The absence of DM in globs and the necessity of DM to make galaxies is a natural consequence of cold dark matter cosmology.
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    Default Re: the core of the Milky Way was formed by

    Quote Originally Posted by not_Fritz_Argelander View Post
    eating globular clusters!

    How Did Our Galactic Nucleus Form?

    this is important to sort out but i don't see how it falsifies the gas collapse model. old stars become RR Lyrae variables. they don't need to remember that they were made in a globular cluster or as a field star in the core. you'd have to do more than this and show that the core had an age homogenous H-R diagram to clinch the point i think in favor of gas collapse and NOT globular cluster stripping.
    I guess if they want to run with GC stripping, what is their explanation for starless galaxies? But I guess we should not mention the clear evidence of star production still going on near the core either
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    Default Re: the core of the Milky Way was formed by

    Quote Originally Posted by MG1692 View Post
    I guess if they want to run with GC stripping, what is their explanation for starless galaxies? But I guess we should not mention the clear evidence of star production still going on near the core either
    it's an important issue all right.

    the starless galaxies.... i'm ok with DM does that well. you're right about the new stars or ore recent stars being formed here.

    so yeah, issue important, logic of the research is importantly flawed.....
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    Default Re: the core of the Milky Way was formed by

    Quote Originally Posted by not_Fritz_Argelander View Post
    eating globular clusters!

    How Did Our Galactic Nucleus Form?

    this is important to sort out but i don't see how it falsifies the gas collapse model. old stars become RR Lyrae variables. they don't need to remember that they were made in a globular cluster or as a field star in the core. you'd have to do more than this and show that the core had an age homogenous H-R diagram to clinch the point i think in favor of gas collapse and NOT globular cluster stripping.
    I hope our Milky Way doesn't get indigestion.
    Jim

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    Default Re: the core of the Milky Way was formed by

    But really. Excellent data. Thanx!
    Jim

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