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Related papers: Timing and Evolution of PSR B0950+08

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The long-term rotational evolution of the old, isolated pulsar, PSR B0950+08 is intriguing in that its spin-down rate displays sinusoidal-like oscillations due to alternating variations, both in magnitude and sign, of the second time…

High Energy Astrophysical Phenomena · Physics 2022-12-15 Erbil Gügercinoğlu , Elif Köksal , Tolga Güver

We present an updated timing solution for the young, energetic pulsar PSR B1509-58 based on 21.3 years of radio timing data and 7.6 years of X-ray timing data. No glitches have occurred in this time span, in contrast to other well-studied…

We use the Bayesian approach to write the posterior probability density for the three-dimensional velocity of a pulsar and for its kinematic age. As a prior, we use the bimodal velocity distribution found in a recent article by Verbunt,…

High Energy Astrophysical Phenomena · Physics 2018-11-01 Andrei P. Igoshev

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

We present timing solutions and spin properties of the young pulsar PSR B0540-69 from analysis of 15.8 yr of data from the Rossi X-Ray Timing Explorer. We perform a partially phase-coherent timing analysis in order to mitigate the…

Solar and Stellar Astrophysics · Physics 2015-10-21 Robert D. Ferdman , Robert F. Archibald , Victoria M. Kaspi

We report on Keck and {\em Hubble Space Telescope} observations of the binary millisecond pulsar PSR B1855+09. We detect its white-dwarf companion and measure $\mv=25.90\pm0.12$ and $\mi=24.19\pm0.11$ (Vega system). From the…

Astrophysics · Physics 2009-10-31 M. H. van Kerkwijk , J. F. Bell , V. M. Kaspi , S. R. Kulkarni

Results of long time observations of the pulsar B0950+08 are given. These observations were carried out at the LPA radio telescope at the frequency of 111 MHz from January of 2016 to May of 2019 (450 days). A strong variability in emission…

High Energy Astrophysical Phenomena · Physics 2022-03-14 V. M. Malofeev , I. F. Malov , O. I. Malov , D. A. Teplykh

PSR B0540-69 has braking index measurement in its persistent state: n=2.129 \pm 0.012. Recently, it is reported to have spin-down state changes: a suddenly 36 % increase in the spin-down rate. Combining the persistent state braking index…

High Energy Astrophysical Phenomena · Physics 2016-05-25 F. F. Kou , Z. W. Ou , H. Tong

We present an updated phase-coherent timing solution for the young, energetic pulsar PSR B1509-58 for twenty years of data. Using a partially phase-coherent timing analysis, we show that the second frequency derivative is changing in time…

Astrophysics · Physics 2007-05-23 Margaret A. Livingstone , Victoria M. Kaspi , Richard N. Manchester

Recently, Parthsarathy et al. analysed long-term timing observations of 85 young radio pulsars. They found that 11 objects have braking indices ranging $\sim 10-100$, far from the classical value $n=3$. They also noted a mild correlation…

High Energy Astrophysical Phenomena · Physics 2020-10-14 A. P. Igoshev , S. B. Popov

We report the discovery and timing measurements of PSR J1208-6238, a young and highly magnetized gamma-ray pulsar, with a spin period of 440 ms. The pulsar was discovered in gamma-ray photon data from the Fermi Large Area Telescope (LAT)…

Measuring a pulsar's rotational evolution is crucial to understanding the nature of the pulsar. Here we provide updated timing models for the rotational evolution of six pulsars, five of which are rotation phase-connected using primarily…

Pulse timing of the isolated pulsar PSR B1882-11 shows strong Fourier power at periods ~1000, 500 and 250 d, correlated with changes in the pulse profile (Stairs, Lyne & Shemar 2000). We study the extent to which these data can be explained…

Astrophysics · Physics 2016-08-30 Bennett Link , Richard I. Epstein

We present the timing and spectral analyses of theXMM-newton data on the 17-Myr-old, nearby radio pulsar B0950+08. This observation revealed pulsations of the X-ray flux of the pulsar at its radio period. The pulse shape and pulsed fraction…

Astrophysics · Physics 2009-11-10 V. E. Zavlin , G. G. Pavlov

The radio millisecond pulsar PSR J1023+0038 exhibits complex timing and eclipse behavior. Here we analyze four years' worth of radio monitoring observations of this object. We obtain a long-term timing solution, albeit with large residual…

High Energy Astrophysical Phenomena · Physics 2013-11-21 Anne M. Archibald , Victoria M. Kaspi , Jason W. T. Hessels , Ben Stappers , Gemma Janssen , Andrew Lyne

We report on a Hubble Space Telescope detection of the nearby, old pulsar B0950+08 ($d\simeq 262$ pc, spin-down age 17.5 Myr) in two far-ultraviolet (FUV) bands. We measured the mean flux densities $\bar{f}_\nu = 109\pm 6$ nJy and $83\pm…

High Energy Astrophysical Phenomena · Physics 2017-12-06 G. G. Pavlov , B. Rangelov , O. Kargaltsev , A. Reisenegger , S. Guillot , C. Reyes

It has long been thought that the pulsed X-ray properties of rotation-powered pulsars are stable on long time scales. However, long-term, systematic studies of individual sources have been lacking. Furthermore, dramatic X-ray variability…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Margaret A. Livingstone , Victoria M. Kaspi

We model the evolution of the spin frequency's second derivative $\ddot\nu$ and the braking index $n$ of radio pulsars with simulations within the phenomenological model of their surface magnetic field evolution, which contains a long-term…

High Energy Astrophysical Phenomena · Physics 2015-10-23 Yi Xie , Shuang-Nan Zhang , Jin-Yuan Liao

We report on the X-ray properties of four rotation-powered pulsars with characteristic ages in the range 0.3-5 Myr, derived from the analysis of XMM-Newton archival observations. We found convincing evidence of thermal emission only in the…

High Energy Astrophysical Phenomena · Physics 2018-07-18 Michela Rigoselli , Sandro Mereghetti

Based on recent Hubble Space Telescope (HST) observations in far-UV and groundbased observations in optical bands, Pavlov and colleagues have revealed a thermal component in the spectrum of the old pulsar B0950+08 (spin-down age 17.5 Myr)…

High Energy Astrophysical Phenomena · Physics 2022-01-26 Vadim Abramkin , George G. Pavlov , Yuriy Shibanov , Oleg Kargaltsev
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