Saturday, March 23, 2013

New numerology for dark energy

At Physics Forums, a poster called "zeroace" has pointed out that, using the new values from the Planck satellite, the dark energy density is very close to 1 - 1/π.

8 comments:

  1. Incidentally, Louise Riofrio's value for the baryonic matter density fraction is 1 - 3/π, which would leave dark matter as 4/π - 1...

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  2. Interesting, and answers a question I recently asked of the new hmap data. I have always regarded the inverse of pi which I called inertial pi as a significant space value.

    L. Edgar Otto I wonder how Ms Riofrio will comment on this.

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    Replies
    1. You might appreciate the fact that this new dark-energy fraction is approximated not only by 1-1/π, but also by ln 2 (the latter was noticed by A. Garces Doz). So ln 2 + 1/π is approximately 1, and these quantities also approximately correspond to "dark energy' and "everything else".

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  3. The next thing I know, the answer to life, the universe and everything will be not 42, but Jenny's Constant.

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  4. I see that I failed to record my own favorite Planck-inspired (and Sheppeard-inspired) numerology, which is that that the density fractions for dark energy, dark matter, and baryonic matter, are approximately 2/3, 2/9, 2/27 (which are the Koide phases of s-c-b, e-mu-tau, and u-c-t respectively).

    But probably no version of these ideas makes sense, in anything like standard cosmology, because there, the density fractions evolve drastically with time.

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  5. Another approach would be to focus on the 9:3:1 ratio. Which is rather approximate, but then the estimated density fractions themselves are somewhat model-dependent.

    I can imagine a relatively mainstream model producing a ratio of the form x^2:x:1...

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  6. This was independently discovered by a Physics Stack Exchange user, "bonkers", around 8 April 2016, but the post has been deleted.

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