Searches for Continuous Gravitational Waves from Young Supernova Remnants in the Early Third Observing Run of Advanced LIGO and Virgo

R. Abbott*, T.D. Abbott*, S. Abraham, F. Acernese, K. Ackley, A. Adams, C. Adams, R.X. Adhikari, V.B. Adya, C. Affeldt, D. Agarwal, M. Agathos, K. Agatsuma, N. Aggarwal, O.D. Aguiar, L. Aiello, A. Ain, P. Ajith, T. Akutsu, K.M. AlemanG. Allen, A. Allocca, P.A. Altin, A. Amato, S. Anand, A. Ananyeva, S.B. Anderson, W.G. Anderson, M. Ando, S.V. Angelova, S. Ansoldi, J.M. Antelis, S. Antier, S. Appert, K. Arai, Y. Arai, S. Araki, A. Araya, M.C. Araya, J.S. Areeda, M. Arene, N. Aritomi, N. Arnaud, S.M. Aronson, K.G. Arun, H. Asada, Y. Asali, G. Ashton, Y. Aso, Stefan Hild, Stefan Danilishin, Jessica Steinlechner, Sebastian Steinlechner, Margot Hennig, Jan-Simon Hennig, Andrei Utina, Viola Spagnuolo, Johannes van den Brand

*Corresponding author for this work

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We present results of three wide-band directed searches for continuous gravitational waves from 15 young supernova remnants in the first half of the third Advanced LIGO and Virgo observing run. We use three search pipelines with distinct signal models and methods of identifying noise artifacts. Without ephemerides of these sources, the searches are conducted over a fRequency band spanning from 10 to 2 kHz. We find no evidence of continuous gravitational radiation from these sources. We set upper limits on the intrinsic signal strain at 95% confidence level in sample subbands, estimate the sensitivity in the full band, and derive the corresponding constraints on the fiducial neutron star ellipticity and r-mode amplitude. The best 95% confidence constraints placed on the signal strain are 7.7 x 10(-26) and 7.8 x 10(-26) near 200 Hz for the supernova remnants G39.2-0.3 and G65.7+1.2, respectively. The most stringent constraints on the ellipticity and r-mode amplitude reach less than or similar to 10(-7) and less than or similar to 10(-5), respectively, at frequencies above similar to 400 Hz for the closest supernova remnant G266.2-1.2/Vela Jr.
Original languageEnglish
Article number80
Number of pages29
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 1 Nov 2021


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