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Thread: hypervelocity binary star: interesting puzzle

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    Default hypervelocity binary star: interesting puzzle



    the article has some hype and inaccuracy... for instance the term acceleration is used in an odd and obscure way

    Astronomers have discovered a super-fast star system that breaks current physics models - ScienceAlert

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    Default Re: hypervelocity binary star: interesting puzzle

    here is an account without hype and fuzzy language

    A Speeding Binary in the Galactic Halo

    and a link to an interesting abstract of the article
    http://iopscience.iop.org/article/10...F375141FCAE.c3

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    Default Re: hypervelocity binary star: interesting puzzle

    My vote is for multiple slingshot events from previous close encounters with other massive stars that add up to the current vector. The original slingshot could have been the MW's smbh but later encounters mask the original trajectory.

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    Default Re: hypervelocity binary star: interesting puzzle

    Quote Originally Posted by Seeker725 View Post
    My vote is for multiple slingshot events from previous close encounters with other massive stars that add up to the current vector. The original slingshot could have been the MW's smbh but later encounters mask the original trajectory.
    Reasonable.
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    Default Re: hypervelocity binary star: interesting puzzle

    Ok, really wild, off the wall thought - and *nothing* more:

    Dark Energy at work?

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    Default Re: hypervelocity binary star: interesting puzzle

    Quote Originally Posted by ThinkerX View Post
    Ok, really wild, off the wall thought - and *nothing* more:

    Dark Energy at work?
    Why specific to this star? Since dark energy seems to not be localized what mechanism would cause it to "pick on" this object?
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    Default Re: hypervelocity binary star: interesting puzzle

    Quote Originally Posted by not_Fritz_Argelander View Post
    Why specific to this star? Since dark energy seems to not be localized what mechanism would cause it to "pick on" this object?
    Even wilder thought, which I should have included with my first post:

    Dark Energy is not uniform, but for unknown reasons can exhibit far greater strength in some localized areas than 'normal.'

    Do note the 'wild speculation' bit.

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    Default Re: hypervelocity binary star: interesting puzzle

    Quote Originally Posted by ThinkerX View Post
    Even wilder thought, which I should have included with my first post:

    Dark Energy is not uniform, but for unknown reasons can exhibit far greater strength in some localized areas than 'normal.'

    Do note the 'wild speculation' bit.
    Noted. None of the models of dark energy deviate from uniformity. There is no reason to appeal to nonuniform dark energy when slingshots (plural) would do. Hence the wildness and speculative nature of your suggestion.

    Certainly if dark energy is modeled as a cosmological constant term in the field equations of GR it is uniform. So you have a contradiction on your hands and need evidence in support.
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