arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1607.08103gr-qc
收藏

存在质点时膨胀背景中引力波的传播

Propagation of gravitational waves in an expanding background in the presence of a point mass

I. Antoniou, D. Papadopoulos, L. Perivolaropoulos

摘要:

我们解决拉普拉斯方程$\Box h_{ij}=0$描述的引力波的传播在一个扩展的背景度规与幂律比例因子的存在下,在弱场近似(牛顿McVittie背景)的质点。我们使用边界条件在大的距离对应于一个常设的球形引力波在一个扩大的背景,这是相当于一个传入和传出的传播引力波的线性组合的质量。我们比较的解决方案与相应的解决方案中的质点的情况下,并表明,质点的波的振幅增加,也降低其频率(观察者在无穷远)按照引力时间延迟。

英文摘要:

We solve the Laplace equation $\Box h_{ij}=0$ describing the propagation of gravitational waves in an expanding background metric with a power law scale factor in the presence of a point mass in the weak field approximation (Newtonian McVittie background). We use boundary conditions at large distances from the mass corresponding to a standing spherical gravitational wave in an expanding background which is equivalent to a linear combination of an incoming and an outgoing propagating gravitational wave. We compare the solution with the corresponding solution in the absence of the point mass and show that the point mass increases the amplitude of the wave and also decreases its frequency (as observed by an observer at infinity) in accordance with gravitational time delay.

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。

↑