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Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars


Abbott, R and Abbott, TD and Abraham, S and Acernese, F and Ackley, K and Palfreyman, JL, 𝘦𝘵 𝘢𝘭, Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars, Astrophysical Journal Letters, 902, (1) Article L21. ISSN 2041-8205 (2020) [Refereed Article]

Copyright Statement

© 2020. The American Astronomical Society. All rights reserved.

DOI: doi:10.3847/2041-8213/abb655


We present a search for continuous gravitational waves from five radio pulsars, comprising three recycled pulsars (PSR J0437−4715, PSR J0711−6830, and PSR J0737−3039A) and two young pulsars: the Crab pulsar (J0534+2200) and the Vela pulsar (J0835−4510). We use data from the third observing run of Advanced LIGO and Virgo combined with data from their first and second observing runs. For the first time, we are able to match (for PSR J0437−4715) or surpass (for PSR J0711−6830) the indirect limits on gravitational-wave emission from recycled pulsars inferred from their observed spin-downs, and constrain their equatorial ellipticities to be less than 10−8. For each of the five pulsars, we perform targeted searches that assume a tight coupling between the gravitational-wave and electromagnetic signal phase evolution. We also present constraints on PSR J0711−6830, the Crab pulsar, and the Vela pulsar from a search that relaxes this assumption, allowing the gravitational-wave signal to vary from the electromagnetic expectation within a narrow band of frequencies and frequency derivatives.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Palfreyman, JL (Dr Jim Palfreyman)
ID Code:147441
Year Published:2020
Web of Science® Times Cited:41
Deposited By:Physics
Deposited On:2021-11-01
Last Modified:2021-12-22

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