arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.2853astro-ph.GAastro-ph.COgr-qc
收藏

银河系自转曲线中的特殊和一般相对论效应

Special and General Relativistic Effects in Galactic Rotation Curves

Alan Cooney, Dimitrios Psaltis, Dennis Zaritsky

摘要:

观测到的平坦的星系自转曲线要么需要牛顿引力势中存在暗物质,要么需要对星系尺度的引力理论进行重大修改。检测旋转曲线中的相对论性多普勒频移和引力效应提供了一种工具,可以区分修改粒子惯性的引力理论预测和修改场方程的引力理论预测。这些高阶效应原则上也允许我们测试暗物质粒子是否遵循等效原理。我们在这里计算的相对论多普勒和引力位移的幅度预计在现实的星系模型中的一般度量引力理论。我们确定了一些可观察到的量,独立测量的特殊和一般的相对论效应在每个星系,并建议这两种效果可能会被检测到在统计意义上适当结合大量的星系的旋转曲线。

英文摘要:

The observed flat rotation curves of galaxies require either the presence of dark matter in Newtonian gravitational potentials or a significant modification to the theory of gravity at galactic scales. Detecting relativistic Doppler shifts and gravitational effects in the rotation curves offers a tool for distinguishing between predictions of gravity theories that modify the inertia of particles and those that modify the field equations. These higher-order effects also allow us in principle, to test whether dark matter particles obey the equivalence principle. We calculate here the magnitudes of the relativistic Doppler and gravitational shifts expected in realistic models of galaxies in a general metric theory of gravity. We identify a number of observable quantities that measure independently the special- and general-relativistic effects in each galaxy and suggest that both effects might be detected in a statistical sense by combining appropriately the rotation curves of a large number of galaxies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑