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Related papers: Polarization and the Age of Pulsars

200 papers

We have conducted observations of 22 pulsars at frequencies of 0.7, 1.4 and 3.1 GHz and present their polarization profiles. The observations were carried out for two main purposes. First we compare the orientation of the spin and velocity…

Astrophysics · Physics 2009-11-13 Simon Johnston , M. Kramer , A. Karastergiou , G. Hobbs , S. Ord , J. Wallman

In this paper we study a set of twelve pulsars that previously had not been characterized. Our timing shows that eleven of them are "normal" isolated pulsars, with rotation periods between 0.22 and 2.65 s, characteristic ages between 0.25…

High Energy Astrophysical Phenomena · Physics 2017-12-27 Casey Brinkman , Paulo Freire , Joanna Rankin , Kevin Stovall

We report on polarimetric observations of 100 pulsars centered on 774 MHz, made using the Green Bank Telescope, presenting their polarization profiles and polarized flux densities and comparing them with previous observations when possible.…

Solar and Stellar Astrophysics · Physics 2009-03-25 J. L. Han , P. B. Demorest , W. van Straten , A. G. Lyne

Modern pulsar surveys produce many millions of candidate pulsars, far more than can be individually inspected. Traditional methods for filtering these candidates, based upon the signal-to-noise ratio of the detection, cannot easily…

Solar and Stellar Astrophysics · Physics 2009-11-13 M. J. Keith , R. P. Eatough , A. G. Lyne , M. Kramer , A. Possenti , F. Camilo , R. N. Manchester

This review describes the observational properties of radio pulsars, fast rotating neutron stars, emitting radio waves. After the introduction we give a list of milestones in pulsar research. The following chapters concentrate on pulsar…

High Energy Physics - Phenomenology · Physics 2009-09-29 John H. Seiradakis , Richard Wielebinski

Two entwined problems have remained unresolved since pulsars were discovered nearly 50 years ago: the orientation of their polarized emission relative to the emitting magnetic field and the direction of putative supernova ``kicks' relative…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Joanna M. Rankin

A large sample of about two hundred pulsars have been observed to study their subpulse modulation at an observing wavelength of (when achievable) both 21 and 92 cm using the Westerbork Synthesis Radio Telescope. For 57 pulsars drifting…

Astrophysics · Physics 2009-11-13 Patrick Weltevrede , Ben Stappers , R. T. Edwards

Using the first station of the Long Wavelength Array (LWA1), we examine polarized pulsar emission between 25 and 88 MHz. Polarized light from pulsars undergoes Faraday rotation as it passes through the magnetized interstellar medium.…

High Energy Astrophysical Phenomena · Physics 2020-07-01 V. Dike , G. B. Taylor , J. Dowell , K. Stovall

A large sample of pulsars has been observed to study their subpulse modulation at an observing wavelength (when achievable) of both 21 and 92 cm using the Westerbork Synthesis Radio Telescope. In this paper we present the 92-cm data and a…

Astrophysics · Physics 2009-11-13 P. Weltevrede , B. W. Stappers , R. T. Edwards

We describe a sensitive targeted search campaign at Parkes to find faint young radio pulsars using the center beam of the 20-cm multibeam receiver. The high frequency of the receiver mitigates scattering effects which can dominate profiles…

Astrophysics · Physics 2007-05-23 F. Crawford , M. J. Pivovaroff , V. M. Kaspi , R. N. Manchester

Using the Very Large Array, we have measured the proper motions of twenty-eight radio pulsars. On average, the pulsars studied are fainter and more distant than those studied in earlier work, reducing the selection biases inherent in…

Astrophysics · Physics 2009-11-10 W. F. Brisken , A. S. Fruchter , W. M. Goss , R. S. Herrnstein , S. E. Thorsett

We report the discovery and follow-up timing observations of the 63 ms radio pulsar, PSR J1105-6107. The pulsar is young, having a characteristic age of only 63 kyr and, from its dispersion measure, is estimated to be at a distance of ~7…

Astrophysics · Physics 2009-10-30 V. M. Kaspi , M. Bailes , R. N. Manchester , B. W. Stappers , J. S. Sandhu , J. Navarro , N. D'Amico

Detecting a pulsar associated with a supernova remnant (SNR) and/or pulsar wind nebula (PWN) is crucial for unraveling its formation history and pulsar wind dynamics, yet the association with a radio pulsar is observed only in a small…

High Energy Astrophysical Phenomena · Physics 2024-12-17 A. Ahmad , S. Dai , S. Lazarević , M. D. Filipović , S. Johnston , M. Kerr , D. Li , C. Maitra , R. N. Manchester

Using pulsewidth data for 872 isolated radio pulsars we test the hypothesis that pulsars evolve through a progressive narrowing of the emission cone combined with progressive alignment of the spin and magnetic axes. The new data provide…

High Energy Astrophysical Phenomena · Physics 2015-05-14 Matthew D. T. Young , Lee S. Chan , Ron R. Burman , David G. Blair

This paper presents a detailed investigation of the dependence of pulsar spin-velocity alignment, which has been observed for a sample of 58 pulsars, on pulsar age. At first, our study considers only pulsar characteristic ages, resulting in…

Astrophysics of Galaxies · Physics 2015-06-12 Aristeidis Noutsos , Dominic Schnitzeler , Evan Keane , Michael Kramer , Simon Johnston

The age of a supernova remnant (SNR) is, though undoubtedly one of the most important properties for study of its evolution, difficult to estimate reliably in most cases. In this study, we compare the dynamical and plasma ages of the SNRs…

High Energy Astrophysical Phenomena · Physics 2021-06-30 Hiromasa Suzuki , Aya Bamba , Shinpei Shibata

Mean pulse profiles and polarization properties are presented for nine southern pulsars. The observations were made using the Parkes radio telescope at frequencies near 1330 MHz; three of the nine pulsars were also observed at 660 MHz. A…

Astrophysics · Physics 2009-11-10 R N Manchester , J L Han

We present polarisation observations of five pulsars whose profiles exhibit two distinct emission regions separated by close to 180 degrees of longitude. We fitted the position angle of the linear polarisation using the rotating vector…

Solar and Stellar Astrophysics · Physics 2015-05-14 M. J. Keith , S. Johnston , M. Kramer , P. Weltevrede

We present the results of a systematic, unbiased search for subpulse modulation of 187 pulsars performed with the Westerbork Synthesis Radio Telescope (WSRT) in the Netherlands at an observing wavelength of 21 cm. Using new observations and…

Astrophysics · Physics 2009-11-11 P. Weltevrede , R. T. Edwards , B. W. Stappers

Most neutron stars are expected to be born in supernovae, but only about half of supernova remnants (SNRs) are associated with a compact object. In many cases, a supernova progenitor may have resulted in a black hole. However, there are…

High Energy Astrophysical Phenomena · Physics 2021-04-02 S. Sett , R. P. Breton , C. J. Clark , M. H. Kerkwijk , D. L. Kaplan