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Samenvatting
We present a targeted search for continuous gravitational waves (GWs) from 236 pulsars using data from the third observing run of LIGO and Virgo (O3) combined with data from the second observing run (O2). Searches were for emission from the l = m = 2 mass quadrupole mode with a frequency at only twice the pulsar rotation frequency (single harmonic) and the l = 2, m = 1, 2 modes with a frequency of both once and twice the rotation frequency (dual harmonic). No evidence of GWs was found, so we present 95% credible upper limits on the strain amplitudes h _{0} for the singleharmonic search along with limits on the pulsars' mass quadrupole moments Q _{22} and ellipticities ε. Of the pulsars studied, 23 have strain amplitudes that are lower than the limits calculated from their electromagnetically measured spindown rates. These pulsars include the millisecond pulsars J04374715 and J07116830, which have spindown ratios of 0.87 and 0.57, respectively. For nine pulsars, their spindown limits have been surpassed for the first time. For the Crab and Vela pulsars, our limits are factors of ∼100 and ∼20 more constraining than their spindown limits, respectively. For the dualharmonic searches, new limits are placed on the strain amplitudes C _{21} and C _{22}. For 23 pulsars, we also present limits on the emission amplitude assuming dipole radiation as predicted by BransDicke theory.
Originele taal2  English 

Artikelnummer  1 
Aantal pagina's  29 
Tijdschrift  The Astrophysical Journal 
Volume  935 
Nummer van het tijdschrift  1 
DOI's  
Status  Published  1 aug 2022 
Bibliografische nota
37 pagesVingerafdruk
Duik in de onderzoeksthema's van 'Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGOVirgo Observing Runs'. Samen vormen ze een unieke vingerafdruk.
FWOIRI15: Essentiële Technologieën voor de Einstein Telescoop
Sevrin, A., Vervaeke, M. & Mariotti, A.
1/01/23 → 31/12/26
Project: Fundamenteel

SRP72: SRPOnderzoekszwaartepunt: Hoge energie fysica (HEP@VUB)
D'Hondt, J., Buitink, S., Craps, B., De Vries, K., Lowette, S. & Mariotti, A.
1/11/22 → 31/10/27
Project: Fundamenteel

iBOF/21/084: Verkenning van het donkere heelal met gravitatiegolven: van kwantum optica tot kwantum gravitatie
Mariotti, A., Hertog, T., Sana, H., Tavernier, F., van Remortel, N., Detavernier, C., Sevrin, A., Vervaeke, M. & Van Erps, J.
1/01/21 → 31/12/26
Project: Fundamenteel