University of Tasmania
Browse
- No file added yet -

Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run

Download (1.26 MB)
journal contribution
posted on 2023-05-21, 03:38 authored by Abbott, BP, Abbott, R, Abbott, TD, Abraham, S, Acernese, F, Ackley, K, Jim PalfreymanJim Palfreyman
Isolated spinning neutron stars, asymmetric with respect to their rotation axis, are expected to be sources of continuous gravitational waves. The most sensitive searches for these sources are based on accurate matched filtering techniques that assume the continuous wave to be phase locked with the pulsar beamed emission. While matched filtering maximizes the search sensitivity, a significant signal-to-noise ratio loss will happen in the case of a mismatch between the assumed and the true signal phase evolution. Narrow-band algorithms allow for a small mismatch in the frequency and spin-down values of the pulsar while coherently integrating the entire dataset. In this paper, we describe a narrow-band search using LIGO O2 data for the continuous wave emission of 33 pulsars. No evidence of a continuous wave signal is found, and upper limits on the gravitational wave amplitude over the analyzed frequency and spin-down ranges are computed for each of the targets. In this search, we surpass the spin-down limit, namely, the maximum rotational energy loss due to gravitational waves emission for some of the pulsars already present in the LIGO O1 narrow-band search, such as J1400-6325, J1813-1246, J1833-1034, J1952+3252, and for new targets such as J0940-5428 and J1747-2809. For J1400-6325, J1833-1034, and J1747-2809, this is the first time the spin-down limit is surpassed.

History

Publication title

Physical Review D

Volume

99

Issue

12

Article number

122002

Number

122002

Pagination

1-20

ISSN

2470-0010

Department/School

School of Natural Sciences

Publisher

American Physical Society

Place of publication

United States

Rights statement

© 2019 American Physical Society

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