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A Falsifications and constraints due to GW measurements

  1. Oct 22, 2017 #1
    This thread is to serve as
    - a collection of theories that have been falsified by and/or have had new constrained placed on them by the ongoing gravitational wave measurements.
    - a place to discuss the further constraining/falsifying of still existing models using GW data.

    I'll start by posting a few papers offering falsifications and/or new constraints:
    Boran et al. 2017, GW170817 Falsifies Dark Matter Emulators
    Baker et al. 2017, Strong constraints on cosmological gravity from GW170817 and GRB 170817A
    Di Valentino et al. 2017, Cosmological constraints combining Planck with the recent gravitational-wave standard siren measurement of the Hubble constant
    Margalit et al. 2017, Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
    Ezquiaga et al. 2017, Dark Energy after GW170817 (1)
    Sakstein et al. 2017, Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
    Creminelli at al. 2017, Dark Energy after GW170817 (2)
    Wang et al. 2017, GW170817/GRB 170817A/AT2017gfo association: some implications for physics and astrophysics
     
  2. jcsd
  3. Oct 27, 2017 #2

    mfb

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    2016 Award

    Staff: Mentor

    A nice collection.

    I wonder how constraints on GR alternatives will change with future observations. Improving the time correlation between GW and electromagnetic signal by a small factor shouldn't make a big difference. We can get more independent estimates of the Hubble constant, of course, but that is a different topic.
     
  4. Nov 8, 2017 #3
    If one could observe more of this sort of event, one could get some idea of the time from the G-wave signal to the gamma-ray one. One may then look for how it varies with distance, or more precisely, estimated Shapiro gravitational time delay from nearby galaxies. The error in the time-delay estimate will go as 1/sqrt(N) for N events, meaning that it may take a lot of events to improve very much on this result.

    Also, it's an interesting term for G-wave events: "standard siren". Presumably because "standard candle" is not a good fit.
     
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