Search for Gravitational Waves from a Long-lived Remnant of the Binary Neutron Star Merger GW170817

Document Type

Article

Publication Date

2019

Keywords

General Relativity and Quantum Cosmology, High Energy Astrophysical Phenomena

Abstract

One unanswered question about the binary neutron star coalescence GW170817 is the nature of its post-merger remnant. A previous search for post-merger gravitational waves targeted high-frequency signals from a possible neutron star remnant with a maximum signal duration of 500 s. Here we revisit the neutron star remnant scenario with a focus on longer signal durations up until the end of the Second Advanced LIGO-Virgo Observing run, 8.5 days after the coalescence of GW170817. The main physical scenario for such emission is the power-law spindown of a massive magnetar-like remnant. We use four independent search algorithms with varying degrees of restrictiveness on the signal waveformand different ways of dealing with noise artefacts. In agreement with theoretical estimates, we find no significant signal candidates. Through simulated signals, we quantify that with the current detector sensitivity, nowhere in the studied parameter space are we sensitive to a signal from more than 1 Mpc away, compared to the actual distance of 40 Mpc. This study however serves as a prototype for post-merger analyses in future observing runs with expected higher sensitivity.

Journal Title

Astrophysical Journal

Volume

875

Issue

2

First Page

2581

DOI

https://doi.org/10.3847/1538-4357/ab0f3d

First Department

Physics

This document is currently not available here.

Share

COinS