当前位置: X-MOL 学术Universe › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Null and Timelike Geodesics near the Throats of Phantom Scalar Field Wormholes
Universe ( IF 2.5 ) Pub Date : 2020-10-16 , DOI: 10.3390/universe6100183
Ivan Potashov , Julia Tchemarina , Alexander Tsirulev

We study geodesic motion near the throats of asymptotically flat, static, spherically symmetric traversable wormholes supported by a self-gravitating minimally coupled phantom scalar field with an arbitrary self-interaction potential. We assume that any such wormhole possesses the reflection symmetry with respect to the throat, and consider only its observable “right half”. It turns out that the main features of bound orbits and photon trajectories close to the throats of such wormholes are very different from those near the horizons of black holes. We distinguish between wormholes of two types, the first and second ones, depending on whether the redshift metric function has a minimum or maximum at the throat. First, it turns out that orbits located near the centre of a wormhole of any type exhibit retrograde precession, that is, the angle of pericentre precession is negative. Second, in the case of high accretion activity, wormholes of the first type have the innermost stable circular orbit at the throat while those of the second type have the resting-state stable circular orbit in which test particles are at rest at all times. In our study, we have in mind the possibility that the strongly gravitating objects in the centres of galaxies are wormholes, which can be regarded as an alternative to black holes, and the scalar field can be regarded as a realistic model of dark matter surrounding galactic centres. In this connection, we discuss qualitatively some observational aspects of results obtained in this article.

中文翻译:

幻影标量场虫洞喉部附近的零时空测地线

我们研究了渐近平坦的,静态的,球形对称的,可穿越的虫洞的喉部附近的测地运动,这些虫洞由具有任意自相互作用势的自引力最小耦合幻象标量场支持。我们假设任何这样的虫洞都具有相对于喉咙的反射对称性,并且仅考虑其可观察到的“右半”。事实证明,靠近此类虫洞的喉部的束缚轨道和光子轨迹的主要特征与黑洞地平线附近的特征和轨道大不相同。我们根据红移度量功能在喉咙处具有最小值还是最大值来区分第一类和第二类两种虫洞。首先,事实证明,位于任何类型的虫洞中心附近的轨道都有逆行进,即,中心点进动的角度为负。其次,在高吸积活性的情况下,第一种类型的虫洞在喉部具有最内部的稳定圆形轨道,而第二种类型的虫洞则具有静止状态的稳定圆形轨道,其中测试颗粒始终处于静止状态。在我们的研究中,我们想到了星系中心强烈引力的物体是虫洞的可能性,虫洞可以被视为黑洞的替代品,标量场可以被视为围绕银河的暗物质的真实模型。中心。在这方面,我们定性地讨论了本文获得的结果的一些观察方面。第一种蠕虫孔在喉部具有最内部的稳定圆形轨道,而第二种蠕虫孔具有静止状态的稳定圆形轨道,其中测试颗粒始终处于静止状态。在我们的研究中,我们想到了星系中心强烈引力的物体是虫洞的可能性,虫洞可以被视为黑洞的替代品,标量场可以被视为围绕银河的暗物质的真实模型。中心。在这方面,我们定性地讨论了本文获得的结果的一些观察方面。第一种蠕虫孔在喉部具有最内部的稳定圆形轨道,而第二种蠕虫孔具有静止状态的稳定圆形轨道,其中测试颗粒始终处于静止状态。在我们的研究中,我们想到了星系中心强烈引力的物体是虫洞的可能性,虫洞可以被视为黑洞的替代品,标量场可以被视为围绕银河的暗物质的真实模型。中心。在这方面,我们定性地讨论了本文获得的结果的一些观察方面。它可以被视为黑洞的替代物,标量场可以被视为围绕银河系中心的暗物质的真实模型。在这方面,我们定性地讨论了本文获得的结果的一些观察方面。它可以被视为黑洞的替代物,标量场可以被视为围绕银河系中心的暗物质的真实模型。在这方面,我们定性地讨论了本文获得的结果的一些观察方面。
更新日期:2020-10-17
down
wechat
bug