Is the Universe Flatter Than We Thought?

[Chronos]

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 σ(ΩK) \simeq0.006 The GR+Λ case yields a value of σ(ΩK) \simeq0.0009 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.

 

[Drakkith]

So is the consensus that we are as flat as a pancake, flatter than a pancake, or a waffle?

 

[Chronos]

I was thinking crepe.