# Testing Theories of Gravitation Using 21-Year Timing of Pulsar Binary J1713+0747

@article{Zhu2015TestingTO,
title={Testing Theories of Gravitation Using 21-Year Timing of Pulsar Binary J1713+0747},
author={W. W. Zhu and Ingrid H. Stairs and Paul B. Demorest and David J. Nice and J. A. Ellis and Scott M. Ransom and Zaven Arzoumanian and Kathryn Crowter and Timothy Dolch and Robert D. Ferdman and Emmanuel Fonseca and M. E. Gonzalez and G. Jones and M. L. Jones and Michael T. Lam and Lina Levin and Maura Mclaughlin and Timothy T. Pennucci and Kevin Stovall and Joseph K. Swiggum},
journal={arXiv: Solar and Stellar Astrophysics},
year={2015}
}
• Published 2 April 2015
• Physics
• arXiv: Solar and Stellar Astrophysics
We report 21-yr timing of one of the most precise pulsars: PSR J1713+0747. Its pulse times of arrival are well modeled by a comprehensive pulsar binary model including its three-dimensional orbit and a noise model that incorporates correlated noise such as jitter and red noise. Its timing residuals have weighted root mean square $\sim 92$ ns. The new dataset allows us to update and improve previous measurements of the system properties, including the masses of the neutron star ($1.31\pm0.11… ## Figures and Tables from this paper The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars • Physics • 2016 We analyze 24 binary radio pulsars in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) nine-year data set. We make fourteen significant measurements of Shapiro delay, An independent test on the local position invariance of gravity with the triple pulsar PSR J0337+1715 We design a direct test of the local position invariance (LPI) in the post-Newtonian gravity, using the timing observation of the triple pulsar, PSR J0337+1715. The test takes advantage of the large Very Long Baseline Astrometry of PSR J1012+5307 and its Implications on Alternative Theories of Gravity • Physics • 2020 PSR J1012+5307, a millisecond pulsar in orbit with a helium white dwarf (WD), has been timed with high precision for about 25 years. One of the main objectives of this long-term timing is to use the Solar system expansion and strong equivalence principle as seen by the NASA MESSENGER mission • Physics Nature Communications • 2017 The MESSENGER data collected over 7 years are used to estimate parameters related to general relativity and the evolution of the Sun to confirm the validity of the strong equivalence principle and confirm the Nordtvedt parameter. Transiting planets as a precision clock to constrain the time variation of the gravitational constant • Physics, Geology • 2016 Analysis of transit times in exoplanetary systems accurately provides an instantaneous orbital period,$P(t)\$, of their member planets. A long-term monitoring of those transiting planetary systems
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