Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

New curvature constraints

  1. Aug 12, 2015 #1

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    This paper;http://arxiv.org/abs/1508.02469 ,Geometrical Constraint on Curvature with BAO experiments, suggests an improvement of curvature constraints on the geometry of the universe. On a purely geometric basis the authors' measurements suggest [tex] σ(ΩK) \simeq0.006 [/tex] The GR+Λ case yields a value of [tex] σ(ΩK) \simeq0.0009 [/tex] Pretty flat either way. The interesting thing about this approach is combining the radial and angular diameter distances allows them to constrain spatial curvature without employing much assumption about theory of structure formation other than the BAO scale such as galaxy bias nor any model of dark energy.
     
  2. jcsd
  3. Aug 13, 2015 #2

    Drakkith

    User Avatar

    Staff: Mentor

    So is the consensus that we are as flat as a pancake, flatter than a pancake, or a waffle?
     
  4. Aug 13, 2015 #3

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    I was thinking crepe.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: New curvature constraints
  1. Spacetime curvature (Replies: 14)

  2. Positive curvature (Replies: 2)

  3. Cosmological curvature (Replies: 27)

Loading...