Switched Magnetospheric Regulation of Pulsar Spin-Down

Lyne, A. G.; Hobbs, G.; Krämer, M.; Stairs, I. H.; Stappers, B. W.

doi:10.1126/science.1186683

Cited by 511 publications

(761 citation statements)

References 30 publications

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“…Recently, new observations have shed some light on emission physics. Lyne et al (2010) reported a correlation between the spin-down rate and pulse profile changes in a sample of mode changing pulsars. They concluded that the magnetosphere switched between multiple quasi-stable states of emission.…”

Section: Quasi-stable Magnetosphere?mentioning

confidence: 99%

Simultaneous radio and X-ray observations of PSR B0611+22

Rajwade

Seymour²,

Lorimer

et al. 2016

Mon. Not. R. Astron. Soc.

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We report results from simultaneous radio and X-ray observations of PSR B0611+22 which is known to exhibit bursting in its single-pulse emission. The pulse phase of the bursts vary with radio frequency. The bursts are correlated in 327/150 MHz datasets while they are anti-correlated, with bursts at one frequency associated with normal emission at the other, in 820/150 MHz datasets. Also, the flux density of this pulsar is lower than expected at 327 MHz assuming a power law. We attribute this unusual behaviour to the pulsar itself rather than absorption by external astrophysical sources. Using this dataset over an extensive frequency range, we show that the bursting phenomenon in this pulsar exhibits temporal variance over a span of few hours. We also show that the bursting is quasi-periodic over the observed band. The anti-correlation in the phase offset of the burst mode at different frequencies suggests that the mechanisms responsible for phase offset and flux enhancement have different dependencies on the frequency. We did not detect the pulsar with XMM-Newton and place a 99% confidence upper limit on the X-ray efficiency of 10 −5 .

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Section: Quasi-stable Magnetosphere?mentioning

confidence: 99%

Simultaneous radio and X-ray observations of PSR B0611+22

Rajwade

Seymour²,

Lorimer

et al. 2016

Mon. Not. R. Astron. Soc.

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“…A wide variety of behavior is observed, however. This includes abrupt changes in the average pulse profile between a small number of modes that may be accompanied by changes in the spin-down rate of the pulsar and are tied to global magnetospheric reconfigurations (Lyne et al 2010). Pulsar emission may also be variable on a variety of timescales: so-called nulling pulsars may cease radio emission in as short as one rotation, remain in a quiescent state for many rotations, and then switch back on just as suddenly.…”

Section: Introductionmentioning

confidence: 99%

The Green Bank North Celestial Cap Pulsar Survey. III. 45 New Pulsar Timing Solutions

Lynch

Swiggum

Kondratiev

et al. 2018

ApJ

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We provide timing solutions for 45 radio pulsars discovered by the Robert C. Byrd Green Bank Telescope. These pulsars were found in the Green Bank North Celestial Cap pulsar survey, an all-GBT-sky survey being carried out at a frequency of 350 MHz. We include pulsar timing data from the Green Bank Telescope and Low Frequency Array. Our sample includes five fully recycled millisecond pulsars (MSPs, three of which are in a binary system), a new relativistic double neutron star system, an intermediate-mass binary pulsar, a mode-changing pulsar, a 138 ms pulsar with a very low magnetic field, and several nulling pulsars. We have measured two post-Keplerian parameters and thus the masses of both objects in the double neutron star system. We also report a tentative companion mass measurement via Shapiro delay in a binary MSP. Two of the MSPs can be timed with high precision and have been included in pulsar timing arrays being used to search for low-frequency gravitational waves, while a third MSP is a member of the black widow class of binaries. Proper motion is measurable in five pulsars, and we provide an estimate of their space velocity. We report on an optical counterpart to a new black widow system and provide constraints on the optical counterparts to other binary MSPs. We also present a preliminary analysis of nulling pulsars in our sample. These results demonstrate the scientific return of long timing campaigns on pulsars of all types.

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“…These profile variations will undoubtedly have an impact on the timing study of this pulsar (van Leeuwen et al, in prep. ) beyond the usual timing noise in young pulsars (Lyne et al 2010).…”

Section: Modeling Of Relativistic Spin Precessionmentioning

confidence: 96%

“…The large value of the misalignment angle explains our quick detection of the precession effects. Its large uncertainty can be justified by the fact that the impact parameter did not have a sign reversal as it happened for PSR J1141−6545 (Manchester et al 2010).…”

Section: Modeling Of Relativistic Spin Precessionmentioning

confidence: 99%

“…The height of the gaussians are normalized using flux density measurements. When producing the beam map for PSR J1141−6545, Manchester et al (2010) aligned the pulse profiles using the edges. In this work, the profiles are aligned with respect to the magnetic poles based on the individual measurements of φ 0 given by the simple RVM fits, hence making no assumption on the beam shape.…”

Section: Modeling Of Relativistic Spin Precessionmentioning

confidence: 99%

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PSR J1906+0746: From relativistic spin-precession to beam modeling

Desvignes

Krämer

Cognard³

et al. 2012

Proc. IAU

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Abstract. Shortly after the discovery of PSR J1906+0746, some hints of profile variations were already interpreted as first signs of relativistic spin-precession occuring. Using observations from the Nançay, Arecibo and Green Bank Radio Observatories, we report here the measurement of pulse profile and polarimetric variations. Using the Rotating Vector Model, we show that PSR J1906+0746 is likely to be an orthogonal rotator (α 80 • ). Fitting our polarimetric data to a precession model, we determined the geometry of the pulsar and found a wide misalignment angle (δ = 89 + 85 −44 deg, 95% C.L.), although the uncertainty is large. Assuming this geometry, we constructed the beam maps of both magnetic poles.

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Switched Magnetospheric Regulation of Pulsar Spin-Down

Cited by 511 publications

References 30 publications

Simultaneous radio and X-ray observations of PSR B0611+22

Simultaneous radio and X-ray observations of PSR B0611+22

The Green Bank North Celestial Cap Pulsar Survey. III. 45 New Pulsar Timing Solutions

PSR J1906+0746: From relativistic spin-precession to beam modeling

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