A new limit on local Lorentz invariance violation of gravity from solitary pulsars

作者：Shao, Lijing^*; Caballero, R. Nicolas; Kramer, Michael; Wex, Norbert; Champion, David J.; Jessner, Axel

来源：Classical and Quantum Gravity, 2013, 30(16): 165019.

DOI：10.1088/0264-9381/30/16/165019

• RELATIVISTIC SPIN PRECESSION
• PREFERRED-FRAME THEORIES
• POST-NEWTONIAN ORDER
• GEODETIC PRECESSION
• BINARY PULSARS
• GALACTIC DISTRIBUTION
• MILLISECOND PULSAR
• GENERAL-RELATIVITY
• CONSERVATION LAWS
• SCALAR THEORIES

Gravitational preferred frame effects are generally predicted by alternative theories that exhibit an isotropic violation of local Lorentz invariance of gravity. They are described by three parameters in the parametrized post-Newtonian formalism. One of their strong-field generalizations, (alpha) over cap (2), induces a precession of a pulsar's spin around its movement direction with respect to the preferred frame. We constrain (alpha) over cap (2) by using the non-detection of such a precession using the characteristics of the pulse profile. In our analysis we use a large number of observations from the 100 m Effelsberg radio telescope, which cover a time span of approximately 15 years. By combining data from two solitary millisecond pulsars, PSRs B1937 + 21 and J1744 - 1134, we get a limit of vertical bar(alpha) over cap (2)vertical bar < 1.6 x 10(-9) at 95% confidence level, which is more than two orders of magnitude better than its best weak-field counterpart from the Solar system.

• 出版日期2013-8-21
• 单位北京大学