An analysis of the timing irregularities for 366 pulsars

By G. Hobbs, Andrew G. Lyne, Michael Kramer. 2009

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We provide an analysis of timing irregularities observed for 366 pulsars. Observations were obtained using the 76-m Lovell radio telescope at the Jodrell Bank Observatory over the past 36 years. These data sets have allowed us to carry out the first large-scale analysis of pulsar timing noise over time-scales of > 10 yr, with multiple observing frequencies and for a large sample of pulsars. Our sample includes both normal and recycled pulsars. The timing residuals for the pulsars with the smallest characteristic ages are shown to be dominated by the recovery from glitch events, whereas the timing irregularities seen for older pulsars are quasi-periodic. We emphasize that previous models that explained timing residuals as a low-frequency noise process are not consistent with observation.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/845cf72eaed677a1ec791db2e2d104d801da6ae5

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Citations in the corpus

The Parkes Pulsar Timing Array Project (2006, background): “Although there is considerable overlap between the samples of the three main existing PTA projects, Hobbs et al. (2010b) list 37 pulsars that are regularly observed by at least one PTA.”
PRECISE γ-RAY TIMING AND RADIO OBSERVATIONS OF 17 FERMI γ-RAY PULSARS (2010, background): “The magnitude of the timing noise has been shown to correlate with frequency derivative (i.e. torque) (Cordes & Downs 1985; Arzoumanian et al. 1994a; Hobbs et al. 2010), but its nature remains poorly understood.”
ASSESSING THE ROLE OF SPIN NOISE IN THE PRECISION TIMING OF MILLISECOND PULSARS (2010, methodology): “In a study of 366 pulsars, Hobbs et al. (2010) and Lyne et al. (2010) identify a few pulsars (≈ 2% of their sample) that contain periodic or quasiperiodic components in residual time series and switches between distinct states of ν̇.”
The International Pulsar Timing Array: First Data Release (2016, methodology): “Combined, these three PTAs form the International PTA (or IPTA, as previously described by Hobbs et al. 2010a; Manchester & IPTA 2013) and presently observe 49 pulsars (see Table 2 for details) in the quest for the aforementioned correlated signals and for GWs in particular.”
Detection of 107 glitches in 36 southern pulsars (2012, background): “Hobbs et al. (2010) and Lyne et al. (2010) suggested that slow glitches are a manifestation of the “ν̇ switching” observed in some pulsars.”