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Eclipses of radio emission have been reported for ~ 58 spider millisecond pulsars (MSP), of which only around 19% have been extensively studied. Such studies at low frequencies are crucial for probing the properties of the eclipse medium,…

High Energy Astrophysical Phenomena · Physics 2024-11-27 Sangita Kumari , Bhaswati Bhattacharyya , Devojyoti Kansabanik , Rahul Sharan , Ankita Ghosh , Jayanta Roy

This study presents an orbital phase-dependent analysis of three black widow spider millisecond pulsars (BW MSPs), aiming to investigate the magnetic field within the eclipse environment. The ultra-wide-bandwidth low-frequency receiver…

We present results from a long-term monitoring of frequency dependent eclipses of the radio emission from PSR J1544+4937 which is a ``black widow spider'' millisecond pulsar (MSP) in a compact binary system. The majority of such systems…

High Energy Astrophysical Phenomena · Physics 2023-11-06 Sangita Kumari , Bhaswati Bhattacharyya , Rahul Sharan , Devojyoti Kansabanik , Benjamin Stappers , Jayanta Roy

We present a comparative study of the low-frequency eclipses of spider (compact, irradiating binary) PSRs B1957+20 and J1816+4510. Combining these data with those of three other eclipsing systems we study the frequency dependence of the…

High Energy Astrophysical Phenomena · Physics 2020-03-11 E. J. Polzin , R. P. Breton , B. Bhattacharyya , D. Scholte , C. Sobey , B. W. Stappers

The frequency dependent eclipses of the radio emission from millisecond pulsars (MSPs) in compact binary systems provide an opportunity to understand the eclipse mechanism and to determine the nature of the eclipsing medium. We combine…

High Energy Astrophysical Phenomena · Physics 2021-10-15 Devojyoti Kansabanik , Bhaswati Bhattacharyya , Jayanta Roy , Benjamin Stappers

Spider pulsars are systems in which a millisecond pulsar (MSP) tightly orbits (Pb $\lesssim$ 1 day) a low mass (mc $\lesssim$ 0.5 M$_\odot$) semi-degenerate star. Spider often display eclipses around superior conjunction. This eclipse…

High Energy Astrophysical Phenomena · Physics 2025-06-18 Clara Blanchard , Lucas Guillemot , Guillaume Voisin , Ismaël Cognard , Gilles Theureau

The radio millisecond pulsar PSR J1023+0038 exhibits complex timing and eclipse behavior. Here we analyze four years' worth of radio monitoring observations of this object. We obtain a long-term timing solution, albeit with large residual…

High Energy Astrophysical Phenomena · Physics 2013-11-21 Anne M. Archibald , Victoria M. Kaspi , Jason W. T. Hessels , Ben Stappers , Gemma Janssen , Andrew Lyne

We present the discovery of PSR J1728-4608, a new redback spider pulsar identified in images from the Australian SKA Pathfinder telescope. PSR J1728-4608 is a millisecond pulsar with a spin period of 2.86 ms, in a 5.05 hr orbit with a…

High Energy Astrophysical Phenomena · Physics 2025-12-11 F. Petrou , Y. Wang , N. Hurley-Walker , S. McSweeney , L. Zhang , R. G. Key , J. Freeburn , B. W. Meyers , David L. Kaplan , A. Zic , Tara Murphy , D. Dobie , Y. Maan

We have observed and analysed the eclipses of the black widow pulsar J1810+1744 at low radio frequencies. Using LOw-Frequency ARray (LOFAR) and Westerbork Synthesis Radio Telescope observations between 2011--2015 we have measured variations…

In this paper we report on $\sim10$ years of observations of PSR J2051$-$0827, at radio frequencies in the range 110--4032 MHz. We investigate the eclipse phenomena of this black widow pulsar using model fits of increased dispersion and…

High Energy Astrophysical Phenomena · Physics 2019-09-16 E. J. Polzin , R. P. Breton , B. W. Stappers , B. Bhattacharyya , G. H. Janssen , S. Osłowski , M. S. E. Roberts , C. Sobey

(Abridged) In the binary radio pulsar system J0737-3039, the faster pulsar A is eclipsed once per orbit. We construct a simple geometric model which successfully reproduces the eclipse light curves, based on the idea that the radio pulses…

Astrophysics · Physics 2009-11-10 Maxim Lyutikov , Christopher Thompson

Using LOFAR, we have performed a very-low-frequency (115-155 MHz) radio survey for millisecond pulsars (MSPs). The survey targeted 52 unidentified Fermi $\gamma$-ray sources. Employing a combination of coherent and incoherent dedispersion,…

We argue that eclipses of radio emission from the millisecond pulsar A in the double pulsar system J0737-3039 are due to synchrotron absorption by plasma in the closed field line region of the magnetosphere of its normal pulsar companion B.…

Astrophysics · Physics 2009-11-10 Roman R. Rafikov , Peter Goldreich

The double pulsar PSR J0737-3039A/B displays short, 30 s eclipses that arise around conjunction when the radio waves emitted by pulsar A are absorbed as they propagate through the magnetosphere of its companion pulsar B. These eclipses…

Binary radio pulsar system J0737-3039 provides an exceptional opportunity to study innermost structure of pulsar magnetospheres due to very tight orbit, favorable directions of pulsars' rotation and magnetic axes and extremely fortuitous…

Astrophysics · Physics 2016-08-30 Maxim Lyutikov

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…

High Energy Astrophysical Phenomena · Physics 2021-11-24 S. Q. Wang , J. B. Wang , N. Wang , J. M. Yao , G. Hobbs , S. Dai , F. F. Kou , C. C. Miao , D. Li , Y. Feng , S. J. Dang , D. H. Wang , P. Wang , J. P. Yuan , C. M. Zhang , L. Zhang , S. B. Zhang , W. W. Zhu

The eclipses seen in the radio emission of some pulsars can be invaluable to study the properties of the material from the companion stripped away by the pulsar. We present a study of six consecutive eclipses of PSR J0024-7204O in the…

High Energy Astrophysical Phenomena · Physics 2024-07-23 F. Abbate , A. Possenti , A. Ridolfi , S. Buchner , M. Geyer , M. Kramer , L. Zhang , A. Corongiu , F. Camilo , M. Bailes

We present the timing solution for the 5.31-ms spider millisecond pulsar (MSP) J1242-4712, discovered with the GMRT. PSR J1242-4712 orbits a companion of minimum mass 0.08 M$_{\odot}$ with an orbital period of 7.7 hrs and occupies a…

We present the first X-ray observations of three recently discovered millisecond pulsars (MSPs) with interesting characteristics: PSR J0337+1715, PSR J0636+5129, and PSR J0645+5158. PSR J0337+1715 is a fast-spinning, bright, and so-far…

We report on the latest six pulsars discovered through our standard pipeline in the intermediate-latitude region (|b| < 15 deg) of the Parkes High Time Resolution Universe Survey (HTRU). We also present timing solutions for the new…

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