Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, Bonn, Germany.
Science. 2013 Apr 26;340(6131):448, 1233232. doi: 10.1126/science.1233232.
Many physically motivated extensions to general relativity (GR) predict substantial deviations in the properties of spacetime surrounding massive neutron stars. We report the measurement of a 2.01 ± 0.04 solar mass (M⊙) pulsar in a 2.46-hour orbit with a 0.172 ± 0.003 M⊙ white dwarf. The high pulsar mass and the compact orbit make this system a sensitive laboratory of a previously untested strong-field gravity regime. Thus far, the observed orbital decay agrees with GR, supporting its validity even for the extreme conditions present in the system. The resulting constraints on deviations support the use of GR-based templates for ground-based gravitational wave detectors. Additionally, the system strengthens recent constraints on the properties of dense matter and provides insight to binary stellar astrophysics and pulsar recycling.
许多基于物理的广义相对论（GR）扩展理论预测，在大质量中子星周围的时空中，物质的属性会发生实质性的偏离。我们报告了一颗质量为 2.01 ± 0.04 太阳质量（M⊙）的脉冲星在一个 2.46 小时轨道上的测量结果，该轨道与一个 0.172 ± 0.003 M⊙的白矮星相互作用。高脉冲星质量和紧凑轨道使这个系统成为一个以前未经过测试的强引力场的敏感实验室。到目前为止，观察到的轨道衰减与 GR 一致，即使在系统中存在极端条件的情况下，也支持了它的有效性。由此产生的对偏差的约束支持了基于 GR 的模板在地面引力波探测器中的使用。此外，该系统加强了对密集物质特性的最新限制，并为双星天体物理学和脉冲星回收提供了深入了解。
