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Constraints on Yukawa parameters by double pulsars

Published online by Cambridge University Press:  20 March 2013

Xue-Mei Deng ,
Yi Xie  and
Tian-Yi Huang
Xue-Mei Deng
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China email: xmd@pmo.ac.cn Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing 210093, China
Yi Xie
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing 210093, China
Tian-Yi Huang
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China
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Abstract

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Although Einstein's general relativity has passed all the tests so far, alternative theories are still required for deeper understanding of the nature of gravity. Double pulsars provide us a significant opportunity to test them. In order to probe some modified gravities which try to explain some astrophysical phenomena without dark matter, we use periastron advance $\dot{\omega}$ of four binary pulsars (PSR B1913+16, PSR B1534+12, PSR J0737-3039 and PSR B2127+11C) to constrain their Yukawa parameters: λ = (3.97 ± 0.01) × 108m and α = (2.40 ± 0.02) × 10−8. It might help us to distinguish different gravity theories and get closer to the new physics.

Keywords

gravitationrelativitypulsars: PSR B1913+16PSR B1534+12PSR J0737-3039PSR B2127+11C

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