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  1. The recent simultaneous detection of gravitational waves and a gamma ray burst from a neutron star merger significantly shrank the space of viable scalar-tensor theories by demanding that the speed of gravity is equal to that of light. The survived theories belong to the class of degenerate higher order scalar-tensor theories. We study whether these theories are suitable as dark energy ...
    Author:Marco Crisostomi, Kazuya KoyamaPublished:2018
  2. The survived theories belong to the class of degenerate higher order scalar-tensor theories. We study whether these theories are suitable as dark energy candidates. We nd scaling solutions in the matter dominated universe that lead to de Sitter solutions at late times without the cosmological constant, realising self-acceleration.
  3. inspirehep.net

    The survived theories belong to the class of degenerate higher order scalar-tensor theories. We study whether these theories are suitable as dark energy candidates. We find scaling solutions in the matter dominated universe that lead to de Sitter solutions at late times without the cosmological constant, realizing self-acceleration.
  4. researchgate.net

    The fate of scalar-tensor theories howev er, does not need to coincide with that of Horndeski theory. It has been realised that it is indeed possible to go b eyond this theory and hav e higher ...
  5. semanticscholar.org

    Figure 1: The evolution of φ̇(t)H(t) and H(t). The scalar field solution is attracted to the matter scaling solution first, and then to the de Sitter scaling solution. We show the evolutions with three different initial conditions. We choose the following parameters: c2 = 3, c3 = 5, c4 = 1, β = −5.3 for this illustration. - "Self-accelerating universe in scalar-tensor theories after GW170817"
  6. link.aps.org

    The recent simultaneous detection of gravitational waves and a gamma-ray burst from a neutron star merger significantly shrank the space of viable scalar-tensor theories by demanding that the speed of gravity is equal to that of light. The survived theories belong to the class of degenerate higher order scalar-tensor theories. We study whether these theories are suitable as dark energy candidates.
  7. semanticscholar.org

    Figure 2: The comoving distance r(z) and the density perturbation divided by the scale factor (1+z)δ(z). For a comparison, the ΛCDM prediction Ωm = 0, 3 is also shown (blue, dashed). The parameters are the same as Fig. 1. - "Self-accelerating universe in scalar-tensor theories after GW170817"
  8. cosmostat.org

    The survived theories belong to the class of degenerate higher order scalar-tensor theories. We study whether these theories are suitable as dark energy candidates. We find scaling solutions in the matter dominated universe that lead to de Sitter solutions at late times without the cosmological constant, realising self-acceleration.
  9. researchportal.port.ac.uk

    Self-accelerating universe in scalar-tensor theories after GW170817. Marco Crisostomi, Kazuya Koyama. Institute of Cosmology & Gravitation; Research output: Contribution to journal › Article › peer-review. 115 Downloads (Pure) Overview; Fingerprint; Projects (1) Projects

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