标题： 关于黑洞候选体中的引力磁进动和准周期振荡 (QPO) 显示英文标题

标题： On Gravitomagnetic Precession and Qpo in Black Hole Candidates

摘要： 黑洞候选体的X射线观测提供了一个有价值的工具，可以探测靠近中心黑洞的区域，在那里强场相对论效应变得重要。 最近的研究表明，这些效应似乎在所观测到的X射线光谱中表现出来，体现在X射线连续谱的形状和发射线的轮廓上，并且在X射线光变曲线上，表现为某些准周期振荡（QPO）。 后者将是本文的重点。 我们将回顾在新的观测数据和替代模型背景下，关于黑洞候选体中引力磁进动的建议性观测证据。 我们将对数据与模型进行定量比较。 我们将评论近期理论和观测工作，以探讨被吸积、绕旋转黑洞轨道运动的物质的引力磁进动是否是一种可行的过程来产生所观测到的QPO。 结果尚无定论。 我们将提到一些可能进一步推进研究以更清楚地阐明这一问题的领域。 显示英文摘要

摘要： The X-ray observation of black hole candidates provides a valuable tool to probe regions very close to the central black hole, where strong-field relativistic effects become important. Recent studies have shown that these effects seem to manifest themselves in the observed X-ray spectrum, in terms of the shape of X-ray continuum and the profile of emission lines, and in the X-ray light curves, in terms of certain quasi-periodic oscillations (QPOs). The latter will be the focus of this paper. We will review the proposed observational evidence for gravitomagnetic precession in black hole candidates, in light of new observational data and alternative models. Quantitative comparison will be made between the data and the models. We will comment on recent theoretical and observational efforts to address whether the gravitomagnetic precession of accreted, orbiting matter around a rotating black hole is a viable process for producing the observed QPOs. The results are inconclusive. We will mention a few areas where further progress can be made to possibly shed more light on the issue.