Size of Shell Universe in Light of Fermi GBM Transient Associated with GW150914

TL;DR

This paper explores how the timing of gamma-ray bursts and gravitational waves from GW150914 can constrain the size and curvature of a hypothetical shell universe in extra-dimensional models.

Contribution

It introduces a method to use joint gravitational wave and gamma-ray observations to set bounds on the size of a shell universe in multi-dimensional space-time.

Findings

Gamma-ray and gravitational wave timing constrains shell universe size.

Joint observations provide stringent bounds on spatial curvature.

Results support or limit extra-dimensional cosmological models.

Abstract

The possible gamma ray burst occurred in location and temporal consistence with gravitational wave event GW150914, as reported by Fermi Gamma-ray Burst Monitor (GBM), offers a new way of constraining models with extra dimensions. Using the time delay in arrival of the gamma ray transient observed by Fermi GBM relative to the gravitational waves event triggered by the LIGO detectors we investigate the size of the spherical brane-universe expanding in multi-dimensional space-time. It is shown that a joint observation of gravitational waves in association with gamma ray burst can provide a very stringent bound on the spatial curvature of the brain.