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We detail the emission behaviors of three long-period pulsars detected using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during the CRAFTS survey. Their rotational periods range from 1.83 s to 4.75 s, and the null…

高能天体物理现象 · 物理学 2025-02-07 H. M. Tedila , D. Li , P. Wang , R. Yuen , J. P. Yuan , N. Wang , Z. G. Wen , S. J. Dang , A. G. Tegegne , R. Rejep , C. C. Miao , FAST Collaboration

PSR B0919+06 generally radiates radio pulses in a normal phase range. It has been known for its occasional perplexing abnormal emission events wherein individual pulses come to an earlier phase range for a few tens of periods and then…

高能天体物理现象 · 物理学 2016-01-13 Jun Han , J. L. Han , Ling-Xiang Peng , De-Yu Tang , Jun Wang , Jun-Qiang Li , Chen Wang , Ye-Zhao Yu , Bin Dong

We present a detailed single-pulse study of the long-period pulsar PSR J2129+4119 using high-sensitivity FAST observations. Despite locating well below the traditional death line, the pulsar exhibits sustained and multi-modal emission…

Pulsar nulling is a phenomenon of sudden cessation of pulse emission for a number of periods. The nulling fraction was often used to characterize the phenomenon. We propose a new method to analyse pulsar nulling phenomenon, by involving two…

高能天体物理现象 · 物理学 2014-07-29 A. Y. Yang , J. L. Han , N. Wang

Pulse nulling is one of many single pulse phenomena exhibited by radio pulsars. The broadband nature of this phenomena remained unexplained due to lack of coordinated observations. We are reporting broadband nulling behaviour of a well…

太阳与恒星天体物理 · 物理学 2012-09-05 Vishal Gajjar , B. C. Joshi , M. Kramer

Single pulse observations, characterizing in detail, the nulling behaviour of PSR B1706$-$16 are being reported for the first time in this paper. Our regular long duration monitoring of this pulsar reveals long nulls of 2 to 5 hours with an…

高能天体物理现象 · 物理学 2018-02-14 Arun Naidu , Bhal Chandra Joshi , P. K Manoharan , M. A Krishnakumar

We present an analysis of the emission behaviour of PSR J1107-5907, a source known to exhibit separate modes of emission, using observations obtained over approximately 10 yr. We find that the object exhibits two distinct modes of emission;…

高能天体物理现象 · 物理学 2015-06-19 N. J. Young , P. Weltevrede , B. W. Stappers , A. G. Lyne , M. Kramer

It has recently been shown that there is a close correlation between the slowdown rates and the pulse shapes of six pulsars, and between the slowdown rates and the flux density of three others. This indicates that these phenomena are…

高能天体物理现象 · 物理学 2015-06-12 Andrew Lyne

We performed simultaneous observations at 326.5 MHz with the Ooty Radio Telescope and at 326, 610 and 1308 MHz with the Giant Meterwave Radio Telescope for a sample of 12 pulsars, where frequency dependent single pulse behaviour was…

高能天体物理现象 · 物理学 2017-08-02 Arun Naidu , Bhal Chandra Joshi , P. K Manoharan , M. A Krishnakumar

We report a detailed observational study of the single pulses from the pulsar J1822$-$2256. The pulsar shows the presence of subpulse drifting, nulling as well as multiple emission modes. During these observations the pulsar existed…

高能天体物理现象 · 物理学 2018-02-21 Rahul Basu , Dipanjan Mitra

We report on the pulse-to-pulse energy distributions and phase-resolved modulation properties for catalogued pulsars in the southern High Time Resolution Universe intermediate-latitude survey. We selected the 315 pulsars detected in a…

The bright pulsar PSR B0329+54 was previously known for many years to have two emission modes. Sensitive observations of individual pulses reveal that the central component of pulse profile, which is called core component, is found to be…

高能天体物理现象 · 物理学 2023-03-29 Tao Wang , J. L. Han , C. Wang , P. F. Wang , D. J. Zhou

In this study, we report on a detailed single pulse polarimetric analysis of the radio emission from the pulsar J2321+6024 (B2319+60) observed with the Giant Metrewave Radio Telescope, over wide frequencies ranging between 300 to 500 MHz…

高能天体物理现象 · 物理学 2022-08-15 Sk. Minhajur Rahaman , Rahul Basu , Dipanjan Mitra , George I. Melikidze

We report detailed investigation of nulling and drifting behavior of two pulsars PSRs J1741-0840 and J1840-0840 observed from the Giant Meterwave Radio Telescope at 625 MHz. PSR J1741-840 was found to show nulling fraction (NF) of around…

高能天体物理现象 · 物理学 2017-10-27 Gajjar Vishal , J. P. Yuan , R. Yuen , Z. G. Wen , Z. Y. Liu , N. Wang

We report on a detailed analysis of the radio emission during the different modes of the pulsar J0826+2637 (B0823+26), observed using the Giant Meterwave Radio Telescope at 306-339 MHz observing frequencies. The pulsar profile has a…

高能天体物理现象 · 物理学 2019-06-19 Rahul Basu , Dipanjan Mitra

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…

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

We report on the discovery of three new pulsars in the first blind survey of the north Galactic plane (45 degrees < l < 135 degrees; |b| < 1 degrees with the Giant Meterwave Radio telescope (GMRT) at an intermediate frequency of 610 MHz.…

How pulsars radiate is a long-standing problem. Detailed polarization measurements of individual pulses shed light on currently unknown emission processes. Recently, based on supersensitive observations, dwarf pulses have been recognized as…

高能天体物理现象 · 物理学 2024-03-19 Yi Yan , J. L. Han , D. J. Zhou , L. Xie , F. F. Kou , P. F. Wang , C. Wang , T. Wang

In this paper, we investigate the emission properties of PSR J1727-2739, whose mean pulse profile has two main components, by analysing five single-pulse observations made using the Parkes 64-m radio telescope with a central frequency of…

高能天体物理现象 · 物理学 2021-10-22 Rukiye Rejep , N. Wang , W. M. Yan , Z. G. Wen