Results 71 to 80 of about 847,988 (312)

A massive millisecond pulsar in an eccentric binary [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
The recent discovery of a population of eccentric (e ~ 0.1) millisecond pulsar (MSP) binaries with low-mass white dwarf companions in the Galactic field represents a challenge to evolutionary models that explain MSP formation as recycling: all such models predict that the orbits become highly circularised during a long period of accretion.
E. D. Barr, P. C. C. Freire, M. Kramer, D. J. Champion, M. Berezina, C. G. Bassa, A. G. Lyne, B. W. Stappers   +7 more
openaire   +3 more sources

On the Orbital Properties of Millisecond Pulsar Binaries [PDF]

The Astrophysical Journal, 2018
Abstract We report a detailed analysis of the orbital properties of a binary millisecond pulsar (MSP) with a white dwarf (WD) companion. Positive correlations between the orbital period P b and eccentricity ϵ are found in two classes of MSP binaries with a He WD and with a CO/ONeMg WD, though their trends are different.
Qin Han, Qin Han, C. Y. Hui, Albert K. H. Kong, Albert K. H. Kong, Pak-Hin Thomas Tam, Kinwah Wu   +6 more
openaire   +4 more sources

CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion

The Astrophysical Journal, 2023
Of the more than 3000 radio pulsars currently known, only ∼300 are in binary systems, and only five of these consist of young pulsars with massive nondegenerate companions.
Bridget C. Andersen, Emmanuel Fonseca, J. W. McKee, B. W. Meyers, Jing Luo, C. M. Tan, I. H. Stairs, Victoria M. Kaspi, M. H. van Kerkwijk, Mohit Bhardwaj, P. J. Boyle, Kathryn Crowter, Paul B. Demorest, Fengqiu A. Dong, Deborah C. Good, Jane F. Kaczmarek, Calvin Leung, Kiyoshi W. Masui, Arun Naidu, Cherry Ng, Chitrang Patel, Aaron B. Pearlman, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mubdi Rahman, Scott M. Ransom, Kendrick M. Smith, Shriharsh P. Tendulkar   +27 more
doaj   +1 more source

A millisecond pulsar in an extremely wide binary system [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We report on 22 yr of radio timing observations of the millisecond pulsar J1024−0719 by the telescopes participating in the European Pulsar Timing Array (EPTA). These observations reveal a significant second derivative of the pulsar spin frequency and confirm the discrepancy between the parallax and Shklovskii distances that has been reported earlier ...
Kejia Lee, Joris P. W. Verbiest, Joris P. W. Verbiest, Delphine Perrodin, Thomas M. Tauris, Paulo C. C. Freire, J. W. McKee, E. Graikou, Weiwei Zhu, P. Lazarus, Gemma H. Janssen, L. Lentati, Gilles Theureau, Ramesh Karuppusamy, Michael Kramer, Christine Jordan, Ismaël Cognard, Stefan Oslowski, Stefan Oslowski, Peter G. Jonker, A. Jessner, R. N. Caballero, S. Sanidas, Kang Liu, K. Lazaridis, Gregory Desvignes, Benjamin Stappers, Andrew Lyne, D. J. Champion, C. G. Bassa, Thomas Wevers, Caterina Tiburzi, Caterina Tiburzi, G. Shaifullah, G. Shaifullah, Lucas Guillemot, R. Smits   +36 more
openaire   +10 more sources

MICROARCSECOND VLBI PULSAR ASTROMETRY WITH PSRπ. I. TWO BINARY MILLISECOND PULSARS WITH WHITE DWARF COMPANIONS [PDF]

, 2016
Model-independent distance constraints to binary millisecond pulsars (MSPs) are of great value to both the timing observations of the radio pulsars and multiwavelength observations of their companion stars.
A. Deller, S. Vigeland, D. Kaplan, W. Goss, W. Brisken, S. Chatterjee, J. Cordes, G. Janssen, T. Lazio, L. Petrov, B. Stappers, A. Lyne   +11 more
semanticscholar   +1 more source

Green Bank Telescope Discovery of the Redback Binary Millisecond Pulsar PSR J0212+5321

The Astrophysical Journal, 2023
We report the discovery of a 2.11 ms binary millisecond pulsar during a targeted search of the redback optical candidate coincident with the γ -ray source 3FGL J0212.5+5320 using the Robert C.
Karen I. Perez, Slavko Bogdanov, Jules P. Halpern, Vishal Gajjar   +3 more
doaj   +1 more source

Seven Pulsars in Binary Systems above the Spin-up Line [PDF]

Proceedings of the International Astronomical Union, 2013, Volume 291, pp. 462-464, 2013
Using data from the ATNF pulsar catalogue, 186 binary pulsars are shown in the magnetic field versus spin period (B-P) diagram, and their relationship to the spin-up line is investigated. Generally speaking, pulsars in binary systems should be below the spin-up line when they get enough accretion mass from their companions.
arxiv   +1 more source

Chandra Observations of Black-Widow Pulsars [PDF]

, 2012
We describe the first X-ray observations of binary millisecond pulsars PSRs J0023+0923, J1810+1744, J2215+5135, and J2256-1024. All four are Fermi gamma-ray sources and three are 'black-widow' pulsars, with companions of mass < 0.1 solar masses.
Camilo, Fernando, Gentile, Peter, Hessels, Jason, Kerr, Matthew, McLaughlin, Maura, Ransom, Scott, Ray, Paul, Roberts, Mallory, Stairs, Ingrid   +8 more
core   +1 more source

Furnishing the Galaxy with Pulsars [PDF]

AIP Conf.Proc.983:610-612,2008, 2007
The majority of pulsar population synthesis studies performed to date have focused on isolated pulsar evolution. Those that have incorporated pulsar evolution within binary systems have tended to either treat binary evolution poorly of evolve the pulsar population in an ad-hoc manner.
arxiv   +1 more source

New tests of local Lorentz invariance of gravity with small-eccentricity binary pulsars [PDF]

, 2012
Some alternative gravity theories allow the Universal matter distribution to single out the existence of a preferred frame, which breaks the symmetry of local Lorentz invariance (LLI) for the gravitational interaction.
Lijing Shao, N. Wex
semanticscholar   +1 more source