not_Fritz_Argelander

  1. A new approach to quantum gravity that is interesting

    by , 04-13-2018 at 03:30 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    https://arxiv.org/abs/1804.03846

    Aw heck. I'll include the abstract even though it's mostly techie talk:

    Starting from a parameterisation of the quantum effective action for gravity we calculate correlation functions for observable quantities. The resulting templates allow to reverse-engineer the couplings describing the effective dynamics from the correlation functions. Applying this new formalism to the autocorrelation function of spatial volume fluctuations measured
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  2. reanalysis suggests that DM may be 3-5% neutrinos

    by , 04-09-2018 at 03:11 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
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  3. Why alternative gravity is a bad bet to solve the Dark Matter problem.

    by , 04-08-2018 at 05:54 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    It is too complicated to make it work to fit the observations is the answer. "Human proposes, Nature disposes" of the theories that are bad. Nature is providing abundant hints that alternative gravity as a solution to DM is not a good idea. Here is a spreadsheet in which I track 16 different tests of DM versus alternative gravity attempts to sweep it aside.

    Dark Matter Status.xls
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  4. The Horsehead Nebula (finally!) and Dim Galaxies near Castor

    by , 03-17-2018 at 08:12 PM
    Quote Originally Posted by j.gardavsky View Post
    Thanks not_Fritz for asking.

    I wanted to put some write&read on the Forum, but did not find time.
    So, here are the links without my comments:
    1. On the Minimum Detection Magnification (MDM) Clarkvision.com: Appendix E to Visual Astronomy of the Deep Sky
    2. Optimum Magnified Visual Angle for the details in the galaxies etc ClarkVision: Visual Astronomy: M51 and magnification
    3. Carlin's interpretation of Blackwell's data Another interpretation of the data from Blackwell, H R (1946): Contrast Thresholds of the Human Eye
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  5. Dr H is skeptical of DM contribution to the structure formation problem

    by , 02-22-2018 at 04:21 PM
    Quote Originally Posted by not_Fritz_Argelander View Post
    This is long because the link in the OP is so very very wrong. Most quotes are from that link. Other quotes are immediately following a link.

    https://backreaction.blogspot.com/20....html?spref=tw
    “We know dark matter is out there because we see its gravitational pull. Without dark matter, Einstein’s theory of general relativity does not predict a universe that looks like what we see; neither galaxies, nor galaxy clusters, nor galactic
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