标题： 从先驱者异常约束一个膨胀的局部各向异性度规 显示英文标题

标题： Constraining an Expanding Locally Anisotropic metric from the Pioneer anomaly

摘要： 讨论了在日心距离超过20 AU时，通过考虑由扩展局部各向异性（ELA）度规描述的背景，双向多普勒加速度向太阳方向或远离太阳方向的可调贡献的可能性。该度规同时包含了标准本地施瓦茨希尔德引力效应和宇宙学宇宙膨胀效应，允许在中间尺度上微调其他引力效应，这些效应可能被暂时解释为冷暗物质或引力相互作用修正的协变参数化。通过考虑当前更新的先驱者异常限制对标准广义相对论偏差的约束，考虑自然气体释放和板载辐射压力，得出ELA度规功能参数的界限，结果得到一个平均的多普勒加速度远离太阳的值为a_p = +0.4^{+2.1}_{-2.0} x 10^{-10} (m/s^2)。还计算了在获得的界限内ELA度规的质量-能量密度，并讨论了其对宇宙学质量-能量密度的相应贡献，为了与Lambda-CDM模型兼容，这些贡献包含在Omega_{连续数据模型}中。 显示英文摘要

摘要： It is discussed the possibility of a fine-tuneable contribution to the two way Doppler acceleration either towards, either outwards the Sun for heliocentric distances above 20 AU by considering a background described by an Expanding Locally Anisotropic (ELA) metric. This metric encodes both the standard local Schwarzschild gravitational effects and the cosmological Universe expansion effects allowing simultaneously to fine-tune other gravitational effects at intermediate scales, which may be tentatively interpreted as a covariant parameterization of either cold dark matter either gravitational interaction corrections. Are derived bounds for the ELA metric functional parameter by considering the bounds on the deviation from standard General Relativity imposed by the current updated limits for the Pioneer anomaly, taking in consideration both the natural outgassing and on-board radiation pressure, resulting in an average Doppler acceleration outwards the Sun of a_p = +0.4^{+2.1}_{-2.0} x 10^{-10} (m/s^2). It is also computed the mass-energy density for the ELA metric within the bounds obtained and are discussed the respective contributions to the cosmological mass-energy density which, for compatibility with the Lambda-CDM model, are included in Omega_{CDM}.