Probing the Emission States of PSR J1107−5907

Wang, Jingbo; Hobbs, G.; Kerr, M.; Shannon, R. M.; Dai, Shi; Ravi, Vikram; Cameron, Andrew D.; Kaczmarek, Jane; Hollow, Robert; Li, Di; Zhang, Lei; Miao, Chenchen; Yuan, Mao; Wang, Shen; Zhang, Songbo; Xu, Heng; Xu, R. X.

doi:10.3847/1538-4357/ab5d38

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…PSR J1107-5907, which was discovered in the Parkes 20 cm multibeam pulsar survey of the Galactic plane (Lorimer et al 2006), is also classified as an aged pulsar with a characteristic age of 4.45 × 10 8 yr. It exhibits three distinct emission states: an off state characterized by no detectable emission, a weak state, and a strong state (O'Brien et al 2006;Wang et al 2020). Young et al (2014) proposed that the off state may represent an extreme manifestation of the weak state.…”

Section: Introductionmentioning

confidence: 99%

Wide-bandwidth Observations of PSR J0941–39 and PSR J1107–5907

Sun,

Wang,

Yan

et al. 2023

ApJ

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We present a polarization analysis of PSR J0941–39 and PSR J1107–5907, which exhibit transitions between being pulsars and rotating radio transients (RRATs), using the ultrawide-bandwidth low-frequency receiver on Murriyang, the Parkes 64 m radio telescope. The spectral index of each pulsar was measured, revealing distinct variations among different states. By using the rotating vector model, we determined that the geometry of the magnetosphere remains consistent between the RRAT state and the pulsar state for PSR J0941–39, with emissions originating from the same height in the magnetosphere. The occurrence of the RRAT state could be attributed to variations in currents within the pulsar’s magnetosphere. Our results suggest that the emission mechanism of an RRAT may share similarities with that of a typical pulsar.

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Section: Introductionmentioning

confidence: 99%

Wide-bandwidth Observations of PSR J0941–39 and PSR J1107–5907

Sun,

Wang,

Yan

et al. 2023

ApJ

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Rapid modification of neutron star surface magnetic field: a proposed mechanism for explaining radio emission state changes in pulsars

Geppert

Basu

Mitra

et al. 2021

Monthly Notices of the Royal Astronomical Society

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The radio emission in many pulsars shows sudden changes, usually within a period, that cannot be related to the steady state processes within the inner acceleration region (IAR) above the polar cap. These changes are often quasi-periodic in nature, where regular transitions between two or more stable emission states are seen. The durations of these states show a wide variety ranging from several seconds to hours at a time. There are strong, small-scale magnetic field structures and huge temperature gradients present at the polar cap surface. We have considered several processes that can cause temporal modifications of the local magnetic field structure and strength at the surface of the polar cap. Using different magnetic field strengths and scales, and also assuming realistic scales of the temperature gradients, the evolutionary time-scales of different phenomena affecting the surface magnetic field were estimated. We find that the Hall drift results in faster changes in comparison to both Ohmic decay and thermoelectric effects. A mechanism based on the partially screened gap (PSG) model of the IAR has been proposed, where the Hall and thermoelectric oscillations perturb the polar cap magnetic field to alter the sparking process in the PSG. This is likely to affect the observed radio emission resulting in the observed state changes.

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Probing the Emission States of PSR J1107−5907

Cited by 2 publications

References 28 publications

Wide-bandwidth Observations of PSR J0941–39 and PSR J1107–5907

Wide-bandwidth Observations of PSR J0941–39 and PSR J1107–5907

Rapid modification of neutron star surface magnetic field: a proposed mechanism for explaining radio emission state changes in pulsars

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