标题： 在洛伦兹破坏下的椭球进动及对中子星的观测后果 显示英文标题

标题： Precession of spheroids under Lorentz violation and observational consequences for neutron stars

摘要： 标准模型扩展（SME）是一个有效的场论框架，用于列出所有破坏洛伦兹对称性的场算符。 研究了最小引力SME对球体的牛顿引力能的各向异性修正，并用微扰方法和数值方法求解刚性球体的旋转。 恢复了Nordtvedt在参数化后牛顿形式中给出的已知受迫进动解，并将其应用于两个观测到的孤立毫秒脉冲星，以对SME框架中破坏洛伦兹对称性的系数设定限制。 发现了一种不同的解，该解描述了在存在破坏洛伦兹对称性的情况下，原本自由进动的恒星的旋转，并研究了其对脉冲星信号和中子星（NSs）发出的连续引力波（GWs）的影响。 一旦未来能够明确识别自由进动的NSs，这项研究将提供新的可能测试破坏洛伦兹对称性的方法。 显示英文摘要

摘要： The Standard-Model Extension (SME) is an effective-field-theoretic framework that catalogs all Lorentz-violating field operators. The anisotropic correction from the minimal gravitational SME to Newtonian gravitational energy for spheroids is studied, and the rotation of rigid spheroids is solved with perturbation method and numerical approach. The well-known forced precession solution given by Nordtvedt in the parameterized post-Newtonian formalism is recovered and applied to two observed solitary millisecond pulsars to set bounds on the coefficients for Lorentz violation in the SME framework. A different solution, which describes the rotation of an otherwise free-precessing star in the presence of Lorentz violation, is found, and its consequences on pulsar signals and continuous gravitational waves (GWs) emitted by neutron stars (NSs) are investigated. The study provides new possible tests of Lorentz violation once free-precessing NSs are firmly identified in the future.