not_Fritz_Argelander

  1. LIGO induces mass refutation of dark energy theories

    by , 12-15-2017 at 11:43 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    https://www.forbes.com/sites/startsw.../#39d731a18ec3

    Death knells for alternative gravity theories inspired by MOND. Dark matter is the only way forward.

    Note the suggested experiment that massive right handed neutrinos are cold dark matter. All that is necessary is that right handed neutrinos be massive enough for neutrinoless double beta decay to be adequately rare.
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  2. LIGO induces mass refutation of dark energy theories

    by , 12-15-2017 at 11:42 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
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  3. Neutrinos closer to solving matter antimatter asymmetry

    by , 12-15-2017 at 11:42 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    https://www.quantamagazine.org/neutr...e-20171212/?=1

    This is big, this trend. Certainly neutrinos are sufficiently abundant early in the Big Bang that they could do the trick. Further consequence is that any need for a new CP violating particle like the axion would disappear. This is indirect evidence that DM isn't axions.
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  4. The O III filter does wonders on the Lagoon Nebula

    by , 08-02-2017 at 08:08 PM
    Quote Originally Posted by j.gardavsky View Post
    Quote Originally Posted by not_Fritz_Argelander View Post
    This is an extremely interesting suggestion that makes excellent sense on physics grounds!
    Hello not_Fritz,

    these are not only the blue Balmer Series lines, but also lots of other ionized gases, even if these other lines are weak,
    Spectroscopy of planetary nebulae

    Moreover, this filter passes also the OIII doublet, Teleskop-Express: Baader CCD-Filter Blau - 1,25" - Interferenzfilter

    Around 2012-13, there used to be a small group
    ...
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  5. a different kind of "fifth force"

    by , 05-28-2017 at 07:30 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    Let me give a hint of my thinking about why fifth, sixth, ... nth forces might be reasonable. It has to do with gauge fields and their internal dimensions.

    Electrodynamics is a gauge field described by a 1 dimensional gauge group, U(1). That U(1) just means that the internal symmetry multiplies the wave function by a phase factor. The U means it preserves the wave functions probability. It's a fancy way of saying that adding a constant to the electric potential makes no difference.
    ...
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