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

Citation

Abbott, BP and Abbott, R and Siellez, K and Zweizig, J, LIGO Scientific Collaboration and the Virgo Collaboration, Search for Gravitational Waves from a Long-lived Remnant of the Binary Neutron Star Merger GW170817, The Astrophysical Journal: An International Review of Astronomy and Astronomical Physics, 875, (2) Article 160. ISSN 0004-637X (2019) [Refereed Article]


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DOI: doi:10.3847/1538-4357/ab0f3d

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 and focus on longer signal durations, up until the end of the second Advanced LIGO-Virgo observing run, which was 8.5 days after the coalescence of GW170817. The main physical scenario for this 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 waveform and 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. However, this study serves as a prototype for post-merger analyses in future observing runs with expected higher sensitivity.

Item Details

Item Type:Refereed Article
Keywords:Gravitational waves, neutron stars, binary neutron star, long-lived star remnant
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:151940
Year Published:2019
Web of Science® Times Cited:57
Deposited By:Physics
Deposited On:2022-08-09
Last Modified:2022-08-09
Downloads:0

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