24–26 Sept 2020
Europe/Warsaw timezone

Cosmic String Interpretation of NANOGrav Pulsar Timing Data

25 Sept 2020, 16:15
30m
invited talk Cosmology

Speaker

Marek Lewicki (King's College London)

Description

The NANOGrav Collaboration has recently reported strong evidence for a stochastic common-spectrum process, which we interpret as a SGWB in the framework of cosmic strings. The possible NANOGrav signal would correspond to a string tension Gμ∈(4×10^{−11},10^{−10}) at the 68% confidence level, with a different frequency dependence from supermassive black hole mergers. The SGWB produced by cosmic strings with such values of Gμ would be beyond the reach of LIGO, but could be measured by other planned and proposed detectors such as SKA, LISA, TianQin, AION-1km, AEDGE, Einstein Telescope and Cosmic Explorer.

Primary author

Marek Lewicki (King's College London)

Presentation materials