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    • Constraints from LIGO O3 Data on Gravitational-wave Emission Due to R-modes in the Glitching Pulsar PSR J0537–6910

    The Astrophysical Journal（2021）SCI 2区SCI 3区

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    Cited 45|Views102
    Abstract
    We present a search for continuous gravitational-wave emission due to r-modes in the pulsar PSR J0537–6910 using data from the LIGO–Virgo Collaboration observing run O3. PSR J0537–6910 is a young energetic X-ray pulsar and is the most frequent glitcher known. The inter-glitch braking index of the pulsar suggests that gravitational-wave emission due to r-mode oscillations may play an important role in the spin evolution of this pulsar. Theoretical models confirm this possibility and predict emission at a level that can be probed by ground-based detectors. In order to explore this scenario, we search for r-mode emission in the epochs between glitches by using a contemporaneous timing ephemeris obtained from NICER data. We do not detect any signals in the theoretically expected band of 86–97 Hz, and report upper limits on the amplitude of the gravitational waves. Our results improve on previous amplitude upper limits from r-modes in J0537-6910 by a factor of up to 3 and place stringent constraints on theoretical models for r-mode-driven spin-down in PSR J0537–6910, especially for higher frequencies at which our results reach below the spin-down limit defined by energy conservation.
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    Gravitational waves,Pulsars,Neutron stars
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    【要点】：本研究利用LIGO O3观测数据，对脉冲星PSR J0537-6910在 glitch 间期的连续引力波辐射进行了搜索，未检测到预期的86-97 Hz频段内的信号，从而对基于r模式振荡的引力波辐射的理论模型提出了严格的限制。
    

    【方法】：研究通过使用 NICER 数据获得的同期计时历书，在脉冲星glitch间期搜索r模式引力波辐射。
    

    【实验】：该实验使用了LIGO-Virgo Collaboration在O3观测运行期间收集的数据，未检测到引力波信号，并报告了引力波振幅的上限，相较于之前的结果提升了约3倍。
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