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We used the magneto-dipole radiation mechanism for the braking of radio pulsars to calculate the new values of magnetic inductions at the surfaces of neutron stars. For this aim we estimated the angles ? between the rotation axis and the…

General Physics · Physics 2017-07-26 E. B. Nikitina , I. F. Malov

With the ever-increasing sensitivity and timing baselines of modern radio telescopes, a growing number of pulsars are being shown to exhibit transitions in their rotational and radio emission properties. In many of these cases, the two are…

High Energy Astrophysical Phenomena · Physics 2022-05-11 B. Shaw , B. W. Stappers , P. Weltevrede , P. R. Brook , A. Karastergiou , C. A. Jordan , M. J. Keith , M. Kramer , A. G. Lyne

Observations of proper motions and their statistical analyses show that the predominant number of pulsars have velocities of the order of 200-250 km/sec. The pulsar population exhibits "asymmetric drift" in the Galaxy. Though there are…

Astrophysics · Physics 2007-05-23 R. Ramachandran

The Large Area Telescope aboard the Fermi spacecraft has detected more than 200 $\gamma$-ray pulsars since its launch in 2008. By concurrently fitting standard geometric model light curves onto Fermi and radio data, researchers have…

High Energy Astrophysical Phenomena · Physics 2018-08-30 M. C. Bezuidenhout , C. Venter , A. S. Seyffert , A. K. Harding

Radio polarization measurements of pulsed emission from pulsars offer a valuable insight into the basic geometry of the neutron star: inclination angle between the magnetic and rotation axis and inclination of the line of sight. So far, all…

High Energy Astrophysical Phenomena · Physics 2017-01-11 J. Pétri

The computation of theoretical pulsar populations has been a major component of pulsar studies since the 1970s. However, the majority of pulsar population synthesis has only regarded isolated pulsar evolution. Those that have examined…

Astrophysics · Physics 2009-11-13 Paul Kiel , Jarrod Hurley , Matthew Bailes , James Murray

We present analytic calculations of the electromagnetic torques acting on a magnetic neutron star rotating in vacuum, including near-zone torques associated with the inertia of dipole and quadrupole magnetic fields. We incorporate these…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. J. Zanazzi , Dong Lai

Our previous paper outlined the general aspects of the theory of radio light curve and polarization formation for pulsars. We predicted the one-to-one correspondence between the tilt of the linear polarization position angle of the and the…

High Energy Astrophysical Phenomena · Physics 2017-06-21 Hayk Hakobyan , Vasily Beskin , Alexander Philippov

Distance measurements are fundamental to radio pulsars' use as astrophysical probes of General Relativity and the interstellar medium. One of the primary methods for determining pulsar distances is HI kinematics, which leverages the radial…

High Energy Astrophysical Phenomena · Physics 2026-05-12 S. Romero-Ruiz , S. K. Ocker

We explain some phenomena existing generally in the timing residuals: amplitude and sign of the second derivative of a pulsar's spin-frequency ($\ddot\nu$), some sophisticated residual patterns, which also change with the time span of data…

High Energy Astrophysical Phenomena · Physics 2016-04-27 Xu-Dong Gao , Shuang-Nan Zhang , Shu-Xu Yi , Yi Xie , Jian-Ning Fu

The observational data (e.g., the timing data and magnetic tilt angles $\chi$) of young pulsars can be used to probe some critical issues about the internal physics of neutron stars (NSs), for instance, the number of precession cycles $\xi$…

High Energy Astrophysical Phenomena · Physics 2024-11-01 Yu-Long Yan , Quan Cheng , Xiao-Ping Zheng

The population of radio pulsars is observed to demonstrate certain polarization properties not explained by the conventional picture of pulsar polarization, namely frequency evolution of polarization, deviations of the linear polarization…

High Energy Astrophysical Phenomena · Physics 2023-08-02 Lucy Oswald , Aris Karastergiou , Simon Johnston

This work is a continuation of two previous papers of a series, in which we examined the pulse-width statistics of normal radio pulsars. In the first paper we compiled the largest ever database of pulsars with interpulses in their mean…

Astrophysics of Galaxies · Physics 2015-06-05 K. Maciesiak , J. Gil , G. Melikidze

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

We review current understanding of the underlying, as opposed to the observed, pulsar population. The observed sample is heavily biased by selection effects, so that surveys see less than 10% of all potentially observable pulsars. We…

Astrophysics · Physics 2007-05-23 D. R. Lorimer

We present here a direct comparison of the polarisation position angle (PA) profiles of 17 pulsars, observed at 1.4 and 3.1 GHz. Absolute PAs are obtained at each frequency, permitting a measurement of the difference in the profiles. By…

Astrophysics · Physics 2016-08-30 A. Karastergiou , S. Johnston

Pulsars are known to display short-term variability. Recently, examples of longer-term emission variability have emerged that are often correlated with changes in the rotational properties of the pulsar. To further illuminate this…

High Energy Astrophysical Phenomena · Physics 2016-01-27 P. R. Brook , A. Karastergiou , S. Johnston , M. Kerr , R. M. Shannon , S. J. Roberts

An isolated pulsar is a rotating neutron star possessing a high magnetic dipole moment that generally makes a finite angle with its rotation axis. As a consequence, the emission of magnetic dipole radiation (MDR) continuously takes away its…

High Energy Astrophysical Phenomena · Physics 2023-02-28 E. C. A. Araujo , V. A. De Lorenci , P. Peter , L. S. Ruiz

The evolutions of a neutron star's rotation and magnetic field (B-field) have remained unsolved puzzles for over half a century. We ascribe the rotational braking torques of pulsar to both components, the standard magnetic dipole radiation…

High Energy Astrophysical Phenomena · Physics 2022-12-12 Cheng-Min Zhang , Xiang-Han Cui , Di Li , De-Hua Wang , Shuang-Qiang Wang , Na Wang , Jian-Wei Zhang , Bo Peng , Wei-Wei Zhu , Yi-Yan Yang , Yuan-Yue Pan

The perturbations such as rotation and PC--current have been believed to be greatly affecting the pulsar radio emission and polarization. The two effects have not been considered simultaneously in the literature, however, each one of these…

High Energy Astrophysical Phenomena · Physics 2015-06-15 D. Kumar , R. T. Gangadhara
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