论文标题

积聚围绕异国情调的潮汐虫孔I.射线追踪

Accretion flows around exotic tidal wormholes I. Ray-tracing

论文作者

Sokoliuk, Oleksii, Praharaj, Subhrat, Baransky, Alexander, Sahoo, P. K.

论文摘要

本文研究了潮汐力存在的各种球形对称虫洞溶液,并应用了许多方法,例如测试粒子轨道动力学,射线追踪和微透镜。我们通过使用$ \ Mathcal {l}^2 $有效电位对测试粒子轨道运动进行了理论预测。为了获得射线追踪图像(几何薄和厚的积聚磁盘,相对论喷气机),我们正确修改了使用Python接口的开源$ \ texttt {gyoto} $代码。我们应用了这种技术来探测像Schwarzschild一样的吸收流,并带有带电的Reissner-Nördstrom(RS)蠕虫(我们假设带电的RS虫洞和特殊情况,并且具有消失的电磁电荷,即Damor-Solodukhin(DS)Wormhole。结果表明,Schwarzschild的光子球类似于薄和厚的吸积盘甚至消失的潮汐力。此外,观察到$ r _ {\ mathrm {ph}} \ to \ infty $ as $α\ to \ infty $,它限制了$α$参数,以使其足够小且积极,以尊重EHT观察。另一方面,对于RS虫洞,光子球半径缩小为$λ\至\ infty $,正如有效电位所预测的那样。除了积聚磁盘外,我们还探测了我们考虑的两个虫洞解决方案附近的相对论喷射。最后,在Star Bulb微透镜的帮助下,我们近似蠕虫阴影的半径,正如我们发现的,对于Schild WH,$ r _ {\ Mathrm {sh}} \ of to Ztf的r_0 $,并用$α$线性地生长。相反,随着DS参数$λ$的增长趋势,带电虫洞的阴影半径逐渐减小。

This paper investigates the various spherically symmetric wormhole solutions in the presence of tidal forces and applies numerous methods, such as test particle orbital dynamics, ray-tracing and microlensing. We make the theoretical predictions on the test particle orbital motion around the tidal wormholes with the use of normalized by $\mathcal{L}^2$ effective potential. In order to obtain the ray-tracing images (of both geometrically thin and thick accretion disks, relativistic jets), we properly modify the open source $\texttt{GYOTO}$ code with python interface. We applied this techniques to probe the accretion flows nearby the Schwarzschild-like and charged Reissner-Nördstrom (RS) wormholes (we assumed both charged RS wormhole and special case with the vanishing electromagnetic charge, namely Damour-Solodukhin (DS) wormhole). It was shown that the photon sphere for Schwarzschild-like wormhole presents for both thin and thick accretion disks and even for the vanishing tidal forces. Moreover, it was observed that $r_{\mathrm{ph}}\to\infty$ as $α\to\infty$, which constraints $α$ parameter to be sufficiently small and positive in order to respect the EHT observations. On the other hand, for the case of RS wormhole, photon sphere radius shrinks as $Λ\to\infty$, as it was predicted by the effective potential. In addition to the accretion disks, we as well probe the relativistic jets around two wormhole solutions of our consideration. Finally, with the help of star bulb microlensing, we approximate the radius of the wormhole shadow and as we found out, for Schild WH, $R_{\mathrm{Sh}}\approx r_0$ for ZTF and grows linearly with $α$. On the contrary, shadow radius for charged wormholes slowly decreases with the growing trend of DS parameter $Λ$.

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