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Pulsar glitches are rapid spin-up events that occur in the rotation of neutron stars, providing a valuable probe into the physics of the interiors of these objects. Long-term monitoring of a large number of pulsars facilitates the detection…

We describe PSR J1926-0652, a pulsar recently discovered with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Using sensitive single-pulse detections from FAST and long-term timing observations from the Parkes 64-m radio…

A typical young pulsar slows down at an imperceptible rate, its spin period increasing by less than 10 microseconds over the course of a year. However, the inertia of a pulsar is so extreme that to effect this tiny change in rotation rate,…

Astrophysics · Physics 2017-08-23 Bryan M. Gaensler

The study of pulsar glitch phenomena serves as a valuable probe into the dynamic properties of matter under extreme high-density conditions, offering insights into the physics within neutron stars. Providing theoretical explanations for the…

High Energy Astrophysical Phenomena · Physics 2025-01-07 Pei-Xin Zhu , Xiao-Ping Zheng

Timing observations of 40 mostly young pulsars using the ATNF Parkes radio telescope between 1990 January and 1998 December are reported. In total, 20 previously unreported glitches and ten other glitches were detected in 11 pulsars. These…

Astrophysics · Physics 2009-10-31 N. Wang , R. N. Manchester , R. T. Pace , M. Bailes , V. M. Kaspi , B. W. Stappers , A. G. Lyne

Seven years of pulse time-of-arrival measurements have been collected from observations of the young pulsar PSR B2334+61 using the Nanshan radio telescope of Urumqi Observatory. A phase-connected solution has been obtained over the whole…

High Energy Astrophysical Phenomena · Physics 2015-05-19 J. P. Yuan , R. N. Manchester , N. Wang , Xia Zhou , Z. Y. Liu , Z. F. Gao

PSR J0537$-$6910 is the most active glitching pulsar with a glitch rate $\sim0.3$ yr $^{-1}$. We have reanalysed 45 glitches of PSR J0537$-$6910 published in the literature and have done post-glitch timing fits within the vortex creep…

High Energy Astrophysical Phenomena · Physics 2021-06-08 Onur Akbal , Erbil Gügercinoğlu , M. Ali Alpar

While pulsars possess exceptional rotational stability, large scale timing studies have revealed at least two distinct types of irregularities in their rotation: red timing noise and glitches. Using modern Bayesian techniques, we…

We present a new phase-coherent timing analysis for the young, energetic pulsar PSR B0540-69 using 7.6 yr of data from the Rossi X-Ray Timing Explorer. We measure the braking index, n=2.140+/-0.009, and discuss our measurement in the…

Astrophysics · Physics 2009-11-13 Margaret A. Livingstone , Victoria M. Kaspi , Fotis P. Gavriil

The presence of superfluid phases in the interior of a neutron star affects its dynamics, as neutrons can flow relative to the non-superfluid (normal) components of the star with little or no viscosity. A probe of superfluidity comes from…

High Energy Astrophysical Phenomena · Physics 2023-12-14 Marco Antonelli , Alessandro Montoli , Pierre Pizzochero

Giant pulsar frequency glitches as detected in the emblematic Vela pulsar have long been thought to be the manifestation of a neutron superfluid permeating the inner crust of a neutron star. However, this superfluid has been recently found…

High Energy Astrophysical Phenomena · Physics 2016-07-27 T. Delsate , N. Chamel , N. Gürlebeck , A. F. Fantina , J. M. Pearson , C. Ducoin

Since its discovery as a pulsar in 2000, the central compact object (CCO) 1E 1207.4-5209 in the supernova remnant PKS 1209-51/52 had been a stable 0.424 s rotator with an extremely small spin-down rate and weak (Bs ~ 9E10 G) surface dipole…

High Energy Astrophysical Phenomena · Physics 2018-10-31 E. V. Gotthelf , J. P. Halpern

Pulsars are known to manifest complex phenomena, such as nulling, sub-pulse drifting, and periodicity. Within the purview of this investigation, we have harnessed the wavelet analysis technique to scrutinize the multifaceted periodicities…

High Energy Astrophysical Phenomena · Physics 2024-03-19 Peng-Fu Tian , Ping Zhang , Wen Yang , Wei Wang , Pei Wang

Rotational glitches in some rotation-powered pulsars display power-law size and exponential waiting time distributions. These statistics are consistent with a state-dependent Poisson process, where the glitch rate is an increasing function…

High Energy Astrophysical Phenomena · Physics 2020-01-08 A. Melatos , L. V. Drummond

During the spin-up phase of a large pulsar glitch - a sudden decrease of the rotational period of a neutron star - the angular velocity of the star may overshoot, namely reach values greater than that observed for the new post-glitch…

High Energy Astrophysical Phenomena · Physics 2020-04-29 Pierre Pizzochero , Alessandro Montoli , Marco Antonelli

We investigate the small, quasi-periodic modulations seen in the gravity-mode period spacings of pulsating stars. These ``wiggles'' are produced by buoyancy glitches -- sharp features in the buoyancy frequency ($N$) caused by composition…

Solar and Stellar Astrophysics · Physics 2026-03-04 Zhao Guo

A striking feature of the Vela pulsar (PSR J0835$-$4510) is that it undergoes sudden increases in its spin frequency, known as glitches, with a fractional amplitude on the order of $10^{-6}$ approximately every 900 days. Glitches of smaller…

High Energy Astrophysical Phenomena · Physics 2023-05-17 L. Dunn , A. Melatos , C. M. Espinoza , D. Antonopoulou , R. Dodson

With the aim of constraining the structural properties of neutron stars and the equation of state of dense matter, we study sudden spin-ups, glitches, occurring in the Vela pulsar and in six other pulsars. We present evidence that glitches…

Astrophysics · Physics 2016-08-30 B. Link , R. I. Epstein , J. M. Lattimer

Pulsar glitches are attributed to the sudden re-coupling of very weakly coupled large scale superfluid components in the neutron star interior. This process leads to rapid exchange of angular momentum and an increase in spin frequency. The…

High Energy Astrophysical Phenomena · Physics 2020-12-22 Brynmor Haskell , Vadym Khomenko , Marco Antonelli , Danai Antonopoulou

Pulsar glitches are sudden increase in their spin frequency, in most cases followed by the long timescale recovery process. As of this writing, about 546 glitches have been reported in 188 pulsars, the Crab pulsar is a special one with…

High Energy Astrophysical Phenomena · Physics 2019-08-09 Weihua Wang , Xiaoping Zheng
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