University of Tasmania
Browse
Siellez - Search for continuous gravitational waves from neutron stars.pdf (491.94 kB)

Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544

Download (491.94 kB)
journal contribution
posted on 2023-05-21, 11:28 authored by Abbott, BP, Abbott, R, Karelle SiellezKarelle Siellez, Zweizig, J, Sigurdsson, S
We describe a directed search for continuous gravitational waves in data from the sixth initial LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of ≈2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0 x 10−25 on intrinsic strain and 8.5 x 10−6 on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spindown ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method is used extensively in searches of Advanced LIGO and Virgo detector data.

History

Publication title

Physical Review D: covering particles, fields, gravitation, and cosmology

Volume

95

Issue

8

Article number

082005

Number

082005

Pagination

1-15

ISSN

2470-0010

Department/School

School of Natural Sciences

Publisher

American Physical Society

Place of publication

United States

Rights statement

© 2017 American Physical Society. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. Must link to published article.

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC