中文
相关论文

相关论文: Meterwavelength Single-pulse Polarimetric Emission…

200 篇论文

We have used the 150 MHz radio continuum survey (TGSS ADR) from the Giant Metrewave Radio Telescope (GMRT) to search for phase-averaged emission toward all well-localized radio pulsars north of -53deg Declination. We detect emission toward…

高能天体物理现象 · 物理学 2016-10-05 D. A. Frail , P. Jagannathan , K. P. Mooley , H. T. Intema

The Parkes multibeam pulsar survey is a sensitive survey of a strip along the Galactic plane with |b|<5 deg and l=260 deg to l=50 deg. It uses a 13-beam receiver on the 64-m Parkes radio telescope, receiving two polarisations per beam over…

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…

高能天体物理现象 · 物理学 2026-05-01 Xiancong Wu , Hongguang Wang , Hao Tong , Rui Luo , Pengfei Wang , Chengbing Lyu , Hai Lei

Pulsars with periods more than 0.4 seconds in the declination range -9o < decj < 42o and in the right ascension range 0h < r.a.< 24h were searched in parallel with the program of interplanetary scintillations monitoring of a large number of…

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…

高能天体物理现象 · 物理学 2016-01-27 P. R. Brook , A. Karastergiou , S. Johnston , M. Kerr , R. M. Shannon , S. J. Roberts

We present the largest single survey to date of average profiles of radio pulsars, observed and processed using the same telescope and data reduction software. Specifically, we present measurements for 1170 pulsars, observed by the Thousand…

Individual radio pulses from a pulsar are directly linked to the underlying emission processes and the associated magnetic field geometry within its magnetosphere. Thus, single-pulse studies across frequencies can provide crucial insights…

高能天体物理现象 · 物理学 2026-01-27 Shyam S. Sharma , Tetsuya Hashimoto , Tomotsugu Goto , Sanjay Kudale , Sujin Eie , Simon C. -C. Ho

Using two observations obtained with the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we present a detailed single-pulse analysis of the high-nulling pulsar PSR J1820-0509. We measure an exceptionally high nulling fraction…

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…

太阳与恒星天体物理 · 物理学 2015-05-14 M. J. Keith , S. Johnston , M. Kramer , P. Weltevrede

The radio polarization properties of the pulsar population are only superficially captured by the conventional picture of pulsar radio emission. We study the broadband polarization of 271 young radio pulsars, focusing particularly on…

高能天体物理现象 · 物理学 2023-01-16 L. S. Oswald , S. Johnston , A. Karastergiou , S. Dai , M. Kerr , M. E. Lower , R. N. Manchester , R. M. Shannon , C. Sobey , P. Weltevrede

Time-scales of radio emission are studied in PSR J0437-4715 at 327 MHz using almost half a million periods of high quality data from Ooty Radio Telescope. The radio emission in this milli second pulsar occurs on a short (s) time-scale of…

天体物理学 · 物理学 2009-10-31 M. Vivekanand

Microstructure emission, involving short time scale, often quasi-periodic, intensity fluctuations in subpulse emission, is well known in normal period pulsars. In this letter, we present the first detections of quasi-periodic microstructure…

高能天体物理现象 · 物理学 2016-12-06 Kishalay De , Yashwant Gupta , Prateek Sharma

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.…

太阳与恒星天体物理 · 物理学 2009-03-25 J. L. Han , P. B. Demorest , W. van Straten , A. G. Lyne

Pulse profile stability in millisecond pulsars (MSPs) is a key factor in achieving high-precision timing essential for detecting nanohertz gravitational waves with Pulsar Timing Arrays (PTAs). In this work, we present a systematic analysis…

高能天体物理现象 · 物理学 2025-09-17 Ankita Ghosh , Bhaswati Bhattacharyya , Rahul Sharan , Patrick Weltevrede , Jayanta Roy , Sangita Kumari

We present initial pulsar results from the first station of the Long Wavelength Array (LWA1) obtained during the commissioning period of LWA1 and early science results. We present detections of periodic emission from 44 previously known…

天体物理仪器与方法 · 物理学 2015-08-06 K. Stovall , P. S. Ray , J. Blythe , J. Dowell , T. Eftekhari , A. Garcia , T. J. W. Lazio , M. McCrackan , F. K. Schinzel , G. B. Taylor

The understanding of pulsar radio emission demands a close look at all regions of the huge parameter space present for pulsar observations. In this review we concentrate on the space given by the range of observed pulse periods, spanning…

天体物理学 · 物理学 2007-05-23 M. Kramer

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…

星系天体物理 · 物理学 2015-06-05 K. Maciesiak , J. Gil , G. Melikidze

Recently a data set containing linear and circular polarisation information of a collection of six hundred pulsars has been released. The operative radio wavelength for the same was 21 cm. Pulsars radio emission process is modelled either…

高能物理 - 唯象学 · 物理学 2019-11-11 Karam Chand , Subhayan Mandal

[...] We present a singlepulse search method, improving on commonly used neural network classifiers thanks to the filtering of radio frequency interference based on its spectral variance and the magnetar's rotation. With this approach, we…

高能天体物理现象 · 物理学 2024-06-05 Marlon L. Bause , Wolfgang Herrmann , Laura G. Spitler