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We have made observations of 98 low-Galactic-latitude pulsars to measure pulse broadening caused by multipath propagation through the interstellar medium. Data were collected with the 305-m Arecibo telescope at four radio frequencies…

Young pulsars deviate from a perfectly regular spin-down by two non-deterministic phenomena: impulsive glitches and timing noise. Both phenomena are interesting per se, and may provide insights into the superfluid properties of neutron…

High Energy Astrophysical Phenomena · Physics 2023-02-17 Marco Antonelli , Avishek Basu , Brynmor Haskell

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

We describe PSR J1926-0652, a pulsar recently discovered with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Using sensitive single-pulse detections from FAST and long-term timing observations from the Parkes 64-m radio…

We have analyzed 5.5 years of timing observations of 7 ``slowly'' rotating radio pulsars, made with the Westerbork Synthesis Radio Telescope. We present improved timing solutions and 30, mostly small new glitches. The most interesting…

Astrophysics · Physics 2007-05-23 G. H. Janssen , B. W. Stappers

This study presents a comprehensive analysis of the spectral properties of 886 pulsars across a wide frequency range from 20MHz to 343.5GHz, including a total of 86 millisecond pulsars. The majority of the pulsars exhibit power-law behavior…

High Energy Astrophysical Phenomena · Physics 2024-04-18 H. W. Xu , R. S. Zhao , Erbil Gugercinoglu , H. Liu , D. Li , P. Wang , C. H. Niu , C. Miao , X. Zhu , R. W. Tian , W. L. Li , S. D. Wang , Z. F. Tu , Q. J. Zhi , S. J. Dang , L. H. Shang , S. Xiao

We present high signal-to-noise, full polarization pulse profiles for 40 bright, 'slowly'-rotating (non-recycled) pulsars using the new Ultra-Wideband Low-frequency (UWL; 704-4032 MHz) receiver on the Parkes radio telescope. We obtain…

High Energy Astrophysical Phenomena · Physics 2021-03-26 C. Sobey , S. Johnston , S. Dai , M. Kerr , R. N. Manchester , L. S. Oswald , A. Parthasarathy , R. M. Shannon , P. Weltevrede

We report two phenomena detected in PSR J0344$-$0901 from two observations conducted at frequency centered at 1.25 GHz using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The first phenomenon manifests as shifting in the…

High Energy Astrophysical Phenomena · Physics 2024-02-26 H. M. Tedila , R. Yuen , N. Wang , D. Li , Z. G. Wen , W. M. Yan , J. P. Yuan , X. H. Han , P. Wang , W. W. Zhu , S. J. Dang , S. Q. Wang , J. T. Xie , Q. D. Wu , Sh. Khasanov , FAST Collaboration

Data are gathered from the Parkes pulsar data archive of twelve young radio pulsars, with the intervals of data for each pulsar ranged between 2.8 years and 6.8 years. 31 glitches are identified by using phase connection from "pulsar…

High Energy Astrophysical Phenomena · Physics 2018-06-15 S. Q. Zhou , J. P. Yuan , J. Zhang , M. Q. Liu , Z. W. Feng. S. J. Dang , X. D. Zhu

We use data from the MeerTime project on the MeerKAT telescope to ask whether the radio emission properties of millisecond pulsars (MSPs) and slowly rotating, younger pulsars (SPs) are similar or different. We show that the flux density…

High Energy Astrophysical Phenomena · Physics 2024-07-10 A. Karastergiou , S. Johnston , B. Posselt , L. S. Oswald , M. Kramer , P. Weltevrede

The long-standing assumption of symmetric radio emission beams from the two magnetic poles of pulsars is challenged by observational evidence of asymmetry and underfill. Direct testing of this symmetry remains difficult for most pulsars. As…

High Energy Astrophysical Phenomena · Physics 2026-05-01 Xiancong Wu , Hongguang Wang , Hao Tong , Rui Luo , Pengfei Wang , Chengbing Lyu , Hai Lei

An interpulse search was carried out in a sample of 96 pulsars observed on the Large Phased Array (LPA) radio telescope in the Pushchino Multibeams Pulsar Search (PUMPS). The pulsar sample is complete for pulsars having a signal-to-noise…

High Energy Astrophysical Phenomena · Physics 2025-03-25 M. O. Toropov , S. A. Tyul'bashev , V. S. Beskin

PSR B0818-41 is one of the few pulsars which show multiple drift regions having well defined phase relationship. In this paper we report new results from the multifrequency GMRT observations of this pulsar. Significant linear polarization…

Astrophysics · Physics 2015-05-13 Bhaswati Bhattacharyya , Yashwant Gupta , Janusz Gil

The usefulness and versatility of the PSRSALSA open-source pulsar data-analysis project is demonstrated through an analysis of the radio pulsar B1839-04. This study focuses on the phenomenon of bi-drifting, an effect where the drift…

High Energy Astrophysical Phenomena · Physics 2016-06-01 Patrick Weltevrede

With its relatively long observation time per pointing, the Parkes multibeam survey was effective in detecting nulling pulsars. We have made 2-hour observations of 23 pulsars which showed evidence for pulse nulling or mode changing in the…

Astrophysics · Physics 2008-11-26 N. Wang , R. N. Manchester , S. Johnston

The observed spectra of 9 pulsars for which multiwavelength data are available from radio to $X$- or $\gamma$-ray bands (Crab, Vela, Geminga, B0656+14, B1055-52, B1509-58, B1706-44, B1929+10, and B1951+32) are compared with the spectrum of…

Astrophysics of Galaxies · Physics 2009-08-11 H. Ardavan , A. Ardavan , J. Singleton , J. Fasel , W. Junor , J. Middleditch , M. R. Perez , A. Schmidt , P. Sengupta , P. Volegov

We introduce a model for pulsars in which non-radial oscillations of high spherical degree (l) aligned to the magnetic axis of a spinning neutron star reproduce the morphological features of pulsar beams. In our model, rotation of the…

Astrophysics · Physics 2009-11-10 J. Christopher Clemens , R. Rosen

We investigate circular polarization in pulsar radio emission through simultaneous observations of PSR B1133+16 at two frequencies. In particular, we investigate the association of the handedness of circular polarization with the orthogonal…

Astrophysics · Physics 2009-11-07 A. Karastergiou , S. Johnston , M. Kramer

It is now known that the emission from radio pulsars can vary over a wide range of timescales, from fractions of seconds to decades. However, it is not yet known if long- and short-term emission variability are caused by the same physical…

High Energy Astrophysical Phenomena · Physics 2019-08-28 Paul Brook , Aris Karastergiou , Simon Johnston

For about half a century the radio pulsar population was observed to spin in the ~0.002-12s range, with different pulsar classes having a spin-period evolution that differs substantially depending on their magnetic fields or past accretion…

High Energy Astrophysical Phenomena · Physics 2022-08-17 Michele Ronchi , Nanda Rea , Vanessa Graber , Natasha Hurley-Walker