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We study the tidal evolution of a binary system consisting of a 1.4 Msun compact object in elliptic orbit about a 10 Msun uniformly rotating main sequence star for various values of the initial orbital parameters. We apply our previously…

Astrophysics · Physics 2007-05-23 M. G. Witte , G. J. Savonije

The extreme timing stability of radio millisecond pulsars (MSPs) combined with their exotic environment and evolutionary history makes them excellent laboratories to probe matter in extreme condition. Population studies indicate that we…

High Energy Astrophysical Phenomena · Physics 2022-04-06 Bhaswati Bhattacharyya , Jayanta Roy

We report the discovery of PSR J1906+0746, a young 144-ms pulsar in a highly relativistic 3.98-hr orbit with an eccentricity of 0.085 and expected gravitational wave coalescence time of 300 Myr. The new pulsar was found during precursor…

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

We report on the high-precision timing of 42 radio millisecond pulsars (MSPs) observed by the European Pulsar Timing Array (EPTA). This EPTA Data Release 1.0 extends up to mid-2014 and baselines range from 7-18 years. It forms the basis for…

We present timing and orbital phase-resolved polarimetry of the millisecond pulsar (MSP) J2101$-$4802, having a spin period of 9.48~ms and dispersion measure (DM) $25.05\ \mathrm{pc\ cm^{-3}}$ discovered with the Giant Meter Radio Telescope…

The standard formation theory of binary millisecond pulsars (BMSPs) predicts efficient orbital circularization due to tidal interaction during the previous mass transfer phase. Therefore, BMSPs are expected to have a circular orbit.…

High Energy Astrophysical Phenomena · Physics 2023-01-18 Wen-Shi Tang , Shi-Jie Gao , Xiang-Dong Li

We analyze 24 binary radio pulsars in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) nine-year data set. We make fourteen significant measurements of Shapiro delay, including new detections in four pulsar-binary…

We report the discovery of an eclipsing binary millisecond pulsar in the globular cluster M92 (NGC6341) with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). PSR J1717+4308A, or M92A, has a pulse frequency of 316.5~Hz…

The high stellar density in the central parsecs around the Galactic Centre makes it a seemingly favourable environment for finding relativistic binary pulsars. These include pulsars orbiting other neutron stars, stellar-mass black holes or…

High Energy Astrophysical Phenomena · Physics 2021-08-25 R. P. Eatough , P. Torne , G. Desvignes , M. Kramer , R. Karuppusamy , B. Klein , L. G. Spitler , K. J. Lee , D. J. Champion , K. Liu , R. S. Wharton , L. Rezzolla , H. Falcke

We present the results of one year of pulse timing observations of PSR J1740-5340, an eclipsing millisecond pulsar located in the globular cluster NGC 6397. We have obtained detailed orbital parameters and a precise position for the pulsar.…

Astrophysics · Physics 2009-11-07 N. D'Amico , A. Possenti , R. N. Manchester , J. Sarkissian , A. G. Lyne , F. Camilo

With recent advances in the sensitivity of radio surveys of the Galactic disk, the number of millisecond pulsars (MSPs) has increased substantially in recent years such that it is now possible to study their demographic properties in more…

High Energy Astrophysical Phenomena · Physics 2022-03-14 Kshitij Aggarwal , Duncan. R. Lorimer

This paper describes the new Globular Clusters GMRT Pulsar Search (GCGPS) survey. This survey aims to find MSPs in the globular clusters (GCs) of the Milky Way using uGMRT. The observations use the uGMRT's Band-4 (550$-$750 MHz) and Band-3…

Triple stars and compact objects are ubiquitously observed in nature. Their long-term evolution is complex; in particular, the von-Zeipel-Lidov-Kozai (ZLK) mechanism can potentially lead to highly eccentric encounters of the inner binary.…

Earth and Planetary Astrophysics · Physics 2022-08-03 Abhi Mangipudi , Evgeni Grishin , Alessandro A. Trani , Ilya Mandel

We present results and applications of high precision timing measurements of the millisecond pulsar J1012+5307. Combining our radio observations with results based on optical observations, we derive complete 3-D velocity information for…

Astrophysics · Physics 2009-11-06 Ch. Lange , F. Camilo , N. Wex , M. Kramer , D. C. Backer , A. G. Lyne , O. Doroshenko

The relativistic double neutron star binary PSR J0737-3039 shows clear evidence of orbital phase-dependent wind-companion interaction, both in radio and X-rays. In this paper we present the results of timing analysis of PSR J0737-3039…

High Energy Astrophysical Phenomena · Physics 2016-06-22 M. N. Iacolina , A. Pellizzoni , E. Egron , A. Possenti , R. Breton , M. Lyutikov , M. Kramer , M. Burgay , S. E. Motta , A. De Luca , A. Tiengo

Millisecond pulsars (MSPs) are mainly characterised by their spin periods, B-fields and masses - quantities which are largely affected by previous interactions with a companion star in a binary system. In this paper, we investigate the…

Solar and Stellar Astrophysics · Physics 2012-08-30 Thomas M. Tauris , Norbert Langer , Michael Kramer

In a search of the unidentified Fermi gamma-ray source 3FGL J1417.5-4402 with the Parkes radio telescope, we discovered PSR J1417-4402, a 2.66 ms pulsar having the same 5.4 day orbital period as the optical and X-ray binary identified by…

Solar and Stellar Astrophysics · Physics 2016-03-23 F. Camilo , J. E. Reynolds , S. M. Ransom , J. P. Halpern , S. Bogdanov , M. Kerr , P. S. Ray , J. M. Cordes , J. Sarkissian , E. D. Barr , E. C. Ferrara

Eclipsing pulsar binaries and binaries with a high mass companion are ideal systems for studying and understanding the properties of plasma in magneto-ionic environments. In this work, the first paper of a series, we present MeerKAT…

High Energy Astrophysical Phenomena · Physics 2026-04-03 Jaikhomba Singha , Dongzi Li , Marisa Geyer , Maciej Serylak , Federico Abbate , Senate Lekomola , Robert Main , Andrea Possenti , Amanda Weltman

In this paper we present the first observations of a large sample of millisecond pulsars at frequencies of 2.7 GHz and 4.9 GHz. Our new flux measurements extend the known spectra for millisecond pulsars to the highest frequencies to date.…

Astrophysics · Physics 2009-10-31 M. Kramer , C. Lange , D. R. Lorimer , D. C. Backer , K. M. Xilouris , A. Jessner , R. Wielebinski