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We report the discovery of the 20.7 ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope…

We consider the tidal excitation of modes in a binary system of arbitrary eccentricity. For a circular orbit, the modes generally undergo forced oscillation with a period equal to the orbital period ($T$). For an eccentric orbit, the…

Astrophysics · Physics 2016-08-30 Pawan Kumar , Chi On Ao , Eliot J. Quataert

We present results of a timing analysis of various isolated pulsars using ESA's \emph{XMM-Newton} observatory. Isolated pulsars are useful for calibration purposes because of their stable emission. We have analyzed six pulsars with…

Astrophysics · Physics 2007-12-11 A. Martin-Carrillo , M. Kirsch , E. Kendziorra , R. Staubert

Pulsar Timing constraints on scalar-tensor theories with conformal and disformal couplings to matter are discussed. Reducing the dynamics to the motion in the centre of mass frame and using the mean anomaly parametrisation, we find the…

General Relativity and Quantum Cosmology · Physics 2023-03-24 David Benisty , Philippe Brax , Anne-Christine Davis

At the highest levels of pulsar timing precision achieved to date, experiments are limited by noise intrinsic to the pulsar. This stochastic wideband impulse modulated self-noise (SWIMS) limits pulsar timing precision by randomly biasing…

Instrumentation and Methods for Astrophysics · Physics 2013-01-23 Stefan Osłowski , Willem van Straten , Paul Demorest , Matthew Bailes

We describe a new and efficient technique which we call sideband or phase-modulation searching that allows one to detect short period binary pulsars in observations longer than the orbital period. The orbital motion of the pulsar during…

Astrophysics · Physics 2009-11-07 Scott M. Ransom , James M. Cordes , Stephen S. Eikenberry

In certain pulsar timing experiments, where observations are scheduled approximately periodically (e.g. daily), timing models with significantly different frequencies (including but not limited to glitch models with different frequency…

High Energy Astrophysical Phenomena · Physics 2021-04-28 Liam Dunn , Marcus E. Lower , Andrew Melatos

We present an analysis of the apsidal motion and light curve parameters of 54 never-before-studied galactic Algol-type binaries. This is the first analysis of such a large sample of eccentric eclipsing binaries in our Galaxy, and has…

Solar and Stellar Astrophysics · Physics 2018-11-22 P. Zasche , M. Wolf , R. Uhlar , P. Cagas , J. Jurysek , M. Masek , K. Honkova , H. Kucakova , M. Lehky , L. Kotkova , G. J. White , D. Bewsher , M. Tylsar , M. Jelinek , A. Paschke

The influence of the low-frequency timing noise on the precision of measurements of the Keplerian and post-Keplerian orbital parameters in binary pulsars is studied. Fundamental limits on the accuracy of tests of alternative theories of…

Astrophysics · Physics 2007-05-23 Sergei M. Kopeikin , Vladimir A. Potapov

This paper reviews the rich corpus of observational evidence for tidal effects in short-period binaries. We review the evidence for ellipsoidal variability and for the observational manifestation of apsidal motion in eclipsing binaries.…

Astrophysics · Physics 2009-11-13 Tsevi Mazeh

We report the phase-connected timing ephemeris, polarization pulse profiles, Faraday rotation measurements, and Rotating-Vector-Model (RVM) fitting results of twelve millisecond pulsars (MSPs) discovered with the Five-hundred-meter Aperture…

We present a simple method for determination of the orbital parameters of binary pulsars, using data on the pulsar period at multiple observing epochs. This method uses the circular nature of the velocity space orbit of Keplerian motion and…

Astrophysics · Physics 2009-11-13 Bhaswati Bhattacharyya , Rajaram Nityananda

Pulsars are neutron stars that rotate rapidly. Most of the pulsars in binary systems tend to spin faster than those in isolation. According to binary evolution theory, radio pulsars in binary systems can have various types of companion…

High Energy Astrophysical Phenomena · Physics 2024-10-02 Shunyi Lan , Xiangcun Meng

We present a study of the gravitational time delay of arrival of signals from binary pulsar systems with rotating black hole companions. In particular, we investigate the strength of this effect (Shapiro delay) as a function of the…

Astrophysics · Physics 2009-10-30 Pablo Laguna , Alex Wolszczan

Compact binary sources that emit gravitational waves (GW) are expected to be both spinning and on eccentric orbits. No closed-form expression for the phasing of GWs are available to date that contain information from both spin and…

General Relativity and Quantum Cosmology · Physics 2025-07-22 Omkar Sridhar , Soham Bhattacharyya , Kaushik Paul , Chandra Kant Mishra

The aim of this paper is to study the time delay on electromagnetic signals propagating across a binary stellar system. We focus on the antisymmetric gravitomagnetic contribution due to the angular momentum of one of the stars of the pair.…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Angelo Tartaglia , Matteo Luca Ruggiero , Alessandro Nagar

(abridged) We report the results of a 10-year timing campaign on PSR J1738+0333, a 5.85-ms pulsar in a low-eccentricity 8.5-hour orbit with a low-mass white dwarf companion (...) The measurements of proper motion and parallax allow for a…

By generalizing earlier work of Johnston & Kulkarni, we present a detailed description of the reduction in the signal-to-noise ratio for observations of binary pulsars. We present analytical expressions, and provide software, to calculate…

Solar and Stellar Astrophysics · Physics 2013-05-29 Manjari Bagchi , Duncan R. Lorimer , Spencer Wolfe

We have used the Green Bank Telescope to observe the millisecond pulsar PSR J0514-4002A on 43 occasions spread over 2 years. This 5-ms pulsar is located in the globular cluster NGC 1851; it belongs to a binary system and has a highly…

Astrophysics · Physics 2011-02-11 Paulo C. Freire , Scott M. Ransom , Yashwant Gupta

The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We introduce PEXO, a…

Earth and Planetary Astrophysics · Physics 2019-11-21 Fabo Feng , Maksym Lisogorskyi , Hugh R. A. Jones , Sergei M. Kopeikin , R. Paul Butler , Guillem Anglada-Escude , Alan P. Boss