“The NANOGrav 11 Year Data Set: Pulsar-timing constraints on the Stochastic Gravitational-wave Background” (2024), by Zaven Arzoumanian et al. Physics and Astronomy research paper. Original abstract below, unchanged. No free PDF was found.

The NANOGrav 11 Year Data Set: Pulsar-timing constraints on the Stochastic Gravitational-wave Background

Zaven Arzoumanian, P. T. Baker, Adam Brazier et al. · January 1, 2024 · Physics and Astronomy

Abstract

We search for an isotropic stochastic gravitational-wave background (GWB) in the newly released 11 year data set from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). While we find no evidence for a GWB, we place constraints on a population of inspiraling supermassive black hole (SMBH) binaries, a network of decaying cosmic strings, and a primordial GWB. For the first time, we find that the GWB constraints are sensitive to the solar system ephemeris (SSE) model used and that SSE errors can mimic a GWB signal. We developed an approach that bridges systematic SSE differences, producing the first pulsar-timing array (PTA) constraints that are robust against SSE errors. We thus place a 95% upper limit on the GW-strain amplitude of A GWB

Source page DOI: 10.25916/sut.26295832.v1