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Abraham, S.; Affeldt, C.; Agathos, M.; Baker, P. T.; Barnum, S.; Berry, C. P. L.; Bertolini, A.; Bhandare, R.; Biscans, S.; Boetzel, Y.; Booth, C. D.; Brady, P. R.; Briggs, J. H.; Buy, C.; Cabero, M.; Cao, J.; Carullo, G.; Chiummo, A.; Christensen, N.; Clearwater, P.; Cornish, N.; Coulon, J.-P.; Coyne, D. C.; Creighton, J. D. E.; Dent, T.; Palma, I. Di; Favata, M.; Fejer, M. M.; Fishbach, M.; Forsyth, P. W. F.; Gaebel, S. M.; Goetz, E.; Gossan, S. E.; Green, A. C.; Groot, P.; Hinderer, T.; Horst, C.; Jadhav, S. J.; Kim, J. C.; Kim, K.; Kim, W.; Kinley-Hanlon, M.; Klika, J. H.; Korth, W. Z.; Lanza, R. K.; Lee, K.; Levin, Y.; Liu, J.; London, L. T.; Loriette, V.; Magaña-Sandoval, F.; Mantovani, M.; Mason, K.; Masso-Reid, M.; McWilliams, S. T.; Mehta, A. K.; Mereni, L.; Merzougui, M.; Mow-Lowry, C. M.; Muratore, M.; Murray, P. G.; Neilson, J.; Ng, S.; Obergaulinger, M.; O'Dea, G. D.; Oh, J. J.; Oram, Richard J.; Pang, B.; Pearlstone, B. L.; Phelps, M.; Pirello, M.; Privitera, S.; Rakhmanov, M.; Sadecki, T.; Schulte, B. W.; Setyawati, Y.; Shink, R.; Sigg, D.; Smith, R. J. E.; Strigin, S. E.; Talukder, D.; Thomas, M.; Töyrä, D.; Trovato, A.; Tsukada, L.; Ueno, K.; Vecchio, A.; Vo, T.; Wang, H.; Wang, W. H.; Wang, Y. F.; Was, M.; Weaver, B.; Weiss, R.; Winkler, W.; Wipf, C. C.; Wofford, J. K.; Yap, M. J.; Yu, Hang; Zhang, J.
Astrophysical journal/The Astrophysical journal, 07/2019, Letnik: 879, Številka: 1Journal Article, Web Resource
We present a search for gravitational waves from 222 pulsars with rotation frequencies 10 Hz. We use advanced LIGO data from its first and second observing runs spanning 2015-2017, which provides the highest-sensitivity gravitational-wave data so far obtained. In this search we target emission from both the l = m = 2 mass quadrupole mode, with a frequency at twice that of the pulsar's rotation, and the l = 2, m = 1 mode, with a frequency at the pulsar rotation frequency. The search finds no evidence for gravitational-wave emission from any pulsar at either frequency. For the l = m = 2 mode search, we provide updated upper limits on the gravitational-wave amplitude, mass quadrupole moment, and fiducial ellipticity for 167 pulsars, and the first such limits for a further 55. For 20 young pulsars these results give limits that are below those inferred from the pulsars' spin-down. For the Crab and Vela pulsars our results constrain gravitational-wave emission to account for less than 0.017% and 0.18% of the spin-down luminosity, respectively. For the recycled millisecond pulsar J0711−6830 our limits are only a factor of 1.3 above the spin-down limit, assuming the canonical value of 1038 kg m2 for the star's moment of inertia, and imply a gravitational-wave-derived upper limit on the star's ellipticity of 1.2 × 10−8. We also place new limits on the emission amplitude at the rotation frequency of the pulsars.
