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We present analysis of the timing noise in PSR J1733-3716, which combines data from Parkes 64-m radio telescope and nearly 15 years of timing data obtained from the Nanshan 25-m radio telescope. The variations in the spin frequency and…

高能天体物理现象 · 物理学 2020-11-06 Yue Hu , Lin li , J. P Yuan , S. J Dang , S. Q Wang , Z. J Wang , R. Yuen

Polarization behaviour shows a transition in the pulsar population, where energetic sources with higher spin-down energy loss, $\dot{E} > 10^{34}$ erg~s$^{-1}$, often have fractional linear polarisation ($L/I$) close to 100\%, while below…

高能天体物理现象 · 物理学 2025-05-20 Dipanjan Mitra , Rahul Basu , George I. Melikidze

We report on an {unusually} bright observation of PSR J1720$-$0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that {was discovered by the Commensal Radio Astronomy FAST…

Bright single pulses of many radio pulsars show rapid intensity fluctuations (called microstructure) when observed with time resolutions of tens of microseconds. Here, we report an analysis of Arecibo 59.5 $\mu$sec-resolution polarimetric…

高能天体物理现象 · 物理学 2015-02-25 Dipanjan Mitra , Mihir Arjunwadkar , Joanna M. Rankin

In this paper we analyze high time resolution single pulse data of PSR B0809+74 at 820 MHz. We compare the subpulse phase behavior, undocumented at 820 MHz, with previously published results. The subpulse period changes over time and we…

太阳与恒星天体物理 · 物理学 2015-05-20 R. Rosen , P. Demorest

Neutron stars in close binary systems have the potential to spin up to millisecond periods due to the accretion of matter and angular momentum from their low-mass companions. In later stages of this process, they sometimes start to swing…

高能天体物理现象 · 物理学 2026-05-22 S. V. Karpov , Artyom S. Tanashkin , G. M. Beskin , V. L. Plokhotnichenko , Y. A. Shibanov , D. A. Zyuzin

We have carried out high frequency radio observations of the high magnetic field pulsar PSR J1119-6127 following its recent X-ray outburst. While initial observations showed no evidence of significant radio emission, subsequent observations…

The carousel model of pulsar emission attributes the phenomenon of subpulse drifting to a set of discrete sparks located very near the stellar surface rotating around the magnetic axis. Here, we investigate the subpulse drifting behaviour…

高能天体物理现象 · 物理学 2019-09-25 S. J. McSweeney , N. D. R. Bhat , G. Wright , S. E. Tremblay , S. Kudale

Rotating Radio Transients (RRATs) are a relatively new subclass of pulsars that emit detectable radio bursts sporadically. We conducted an analysis of 10 RRATs observed using the Parkes telescope, with 8 of these observed via the…

高能天体物理现象 · 物理学 2024-02-29 Xinhui Ren , Jingbo Wang , Wenming Yan , Jintao Xie , Shuangqiang Wang , Yirong Wen , Yong Xia

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…

天体物理学 · 物理学 2009-11-13 P. Weltevrede , B. W. Stappers , R. T. Edwards

We report on radio observations of four magnetars SGR 0501+4516, Swift 1834.9-0846, 1E 1841-045, SGR 1900+14 and a magnetar-like pulsar PSR J1846-0258 with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at 1250 MHz.…

高能天体物理现象 · 物理学 2024-12-31 Juntao Bai , Na Wang , Shi Dai , Shuangqiang Wang , Jianping Yuan , Wenming Yan , Lunhua Shang , Xin Xu , Shijun Dang , Zhen Zhang

PSR B1931+24 (J1933+2421) behaves as an ordinary isolated radio pulsar during active phases that are 5-10 days long. However, the radio emission switches off in less than 10 seconds and remains undetectable for the next 25-35 days, then it…

天体物理学 · 物理学 2009-04-13 M. Kramer , A. G. Lyne , J. T. O'Brien , C. A. Jordan , D. R. Lorimer

Timing analysis of PSR J1705$-$1906 using data from Nanshan 25-m and Parkes 64-m radio telescopes, which span over fourteen years, shows that the pulsar exhibits significant proper motion, and rotation instability. We updated the astrometry…

高能天体物理现象 · 物理学 2018-10-23 Y. L. Liu , J. P. Yuan , J. B. Wang , X. W. Liu , N. Wang , R. Yuen

Polarization profiles are presented for 20 millisecond pulsars that are being observed as part of the Parkes Pulsar Timing Array project. The observations used the Parkes multibeam receiver with a central frequency of 1369 MHz and the…

We have studied the variability of PSR J0529-6652, a radio pulsar in the LMC, using observations conducted at 1390 MHz with the Parkes 64-m telescope. PSR J0529-6652 is detectable as a single pulse emitter, with amplitudes that classify the…

太阳与恒星天体物理 · 物理学 2015-06-12 Fronefield Crawford , Dean Altemose , Hannan Li , Duncan R. Lorimer

PSR B0031-07 is well known to exhibit three different modes of drifting sub-pulses (mode A, B and C). It has recently been shown that in a multifrequency observation, consisting of 2700 pulses, all driftmodes were visible at low…

天体物理学 · 物理学 2009-11-13 J. M. Smits , D. Mitra , B. W. Stappers , J. Kuijpers , P. Weltevrede , A. Jessner , Y. Gupta

We have investigated the radio emission from the anomalous X-ray pulsar 1E 1547.0-5408 (PSR J1550-5418) using the Parkes telescope and the Australia Telescope Compact Array. The flux density of the pulsar is roughly the same between 1.4 and…

天体物理学 · 物理学 2009-11-13 F. Camilo , J. Reynolds , S. Johnston , J. P. Halpern , S. M. Ransom

A large sample of pulsars was observed as part of the Meterwavelength Single-pulse Polarimetric Emission Survey. We carried out a detailed fluctuation spectral analysis which revealed periodic features in 46% pulsars including 22 pulsars…

高能天体物理现象 · 物理学 2016-12-14 Rahul Basu , Dipanjan Mitra , George I. Melikidze , Krzysztof Maciesiak , Anna Skrzypczak , Andrzej Szary

The PSR J1023+0038 binary system hosts a neutron star and a low-mass, main-sequence-like star. It switches on year timescales between states as an eclipsing radio millisecond pulsar and a low-mass X-ray binary. We present a multi-wavelength…

We present the flux density measurements of the pulsars observed in the Meterwavelength single-pulse polarimetric emission survey. The average flux densities were estimated in 113 pulsars at two frequencies of 325 and 610 MHz using…

高能天体物理现象 · 物理学 2021-08-25 Rahul Basu , Dipanjan Mitra , George I. Melikidze