We present a search for quasi-monochromatic gravitational-wave signals from the young, energetic X-ray pulsar PSR J0537-6910 using data from the second and third observing runs of LIGO and Virgo. The search is enabled by a contemporaneous timing ephemeris obtained using Neutron star Interior Composition Explorer (NICER) data. The NICER ephemeris has also been extended through 2020 October and includes three new glitches. PSR J0537-6910 has the largest spin-down luminosity of any pulsar and exhibits fRequent and strong glitches. Analyses of its long-term and interglitch braking indices provide intriguing evidence that its spin-down energy budget may include gravitational-wave emission from a time-varying mass quadrupole moment. Its 62 Hz rotation frequency also puts its possible gravitational-wave emission in the most sensitive band of the LIGO/Virgo detectors. Motivated by these considerations, we search for gravitational-wave emission at both once and twice the rotation frequency from PSR J0537-6910. We find no signal, however, and report upper limits. Assuming a rigidly rotating triaxial star, our constraints reach below the gravitational-wave spin-down limit for this star for the first time by more than a factor of 2 and limit gravitational waves from the l = m = 2 mode to account for less than 14% of the spin-down energy budget. The fiducial equatorial ellipticity is constrained to less than about 3 ×10-5, which is the third best constraint for any young pulsar.

Diving below the spin-down limit: Constraints on gravitational waves from the energetic young pulsar PSR J0537-6910 / Abbott, R., Abbott, T.D., Abraham, S., Acernese, F., Ackley, K., Adams, A., Adams, C., Adhikari, R.X., Adya, V.B., Affeldt, C., Agarwal, D., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O.D., Aiello, L., Ain, A., Ajith, P., Akutsu, T., Aleman, K.M., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 913:2(2021), p. L27. [10.3847/2041-8213/abffcd]

Diving below the spin-down limit: Constraints on gravitational waves from the energetic young pulsar PSR J0537-6910

Astone P.;Boldrini M.;Di Pace S.;Di Palma I.;Drago M.;Frasca S.;Giacoppo L.;Leaci P.;Majorana E.;Mangano V.;Muciaccia F.;Naticchioni L.;Palomba C.;Pannarale F.;Paolone A.;Piccinni O. J.;Pierini L.;Placidi E.;Rapagnani P.;Ricci F.;Salemi F.;
2021

Abstract

We present a search for quasi-monochromatic gravitational-wave signals from the young, energetic X-ray pulsar PSR J0537-6910 using data from the second and third observing runs of LIGO and Virgo. The search is enabled by a contemporaneous timing ephemeris obtained using Neutron star Interior Composition Explorer (NICER) data. The NICER ephemeris has also been extended through 2020 October and includes three new glitches. PSR J0537-6910 has the largest spin-down luminosity of any pulsar and exhibits fRequent and strong glitches. Analyses of its long-term and interglitch braking indices provide intriguing evidence that its spin-down energy budget may include gravitational-wave emission from a time-varying mass quadrupole moment. Its 62 Hz rotation frequency also puts its possible gravitational-wave emission in the most sensitive band of the LIGO/Virgo detectors. Motivated by these considerations, we search for gravitational-wave emission at both once and twice the rotation frequency from PSR J0537-6910. We find no signal, however, and report upper limits. Assuming a rigidly rotating triaxial star, our constraints reach below the gravitational-wave spin-down limit for this star for the first time by more than a factor of 2 and limit gravitational waves from the l = m = 2 mode to account for less than 14% of the spin-down energy budget. The fiducial equatorial ellipticity is constrained to less than about 3 ×10-5, which is the third best constraint for any young pulsar.
2021
Gravitational waves, neutron stars, pulsar
01 Pubblicazione su rivista::01a Articolo in rivista
Diving below the spin-down limit: Constraints on gravitational waves from the energetic young pulsar PSR J0537-6910 / Abbott, R., Abbott, T.D., Abraham, S., Acernese, F., Ackley, K., Adams, A., Adams, C., Adhikari, R.X., Adya, V.B., Affeldt, C., Agarwal, D., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O.D., Aiello, L., Ain, A., Ajith, P., Akutsu, T., Aleman, K.M., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 913:2(2021), p. L27. [10.3847/2041-8213/abffcd]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1585167
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