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arXiv 1605.08293gr-qcastro-ph.HEhep-th
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有和没有标量头发的克尔黑洞的阴影

Shadows of Kerr black holes with and without scalar hair

Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu, Helgi F. Runarsson

摘要:

对于观测者来说,黑洞(BH)阴影是黑洞在天空中的明显图像,这是由于附近辐射的引力透镜,由外部源发射。最近一类解决方案称为克尔BH标量头发拥有较小的阴影比相应的克尔BH,在某些条件下,可以出现新的异国情调的阴影形状。因此,这些毛茸茸的黑洞可能为未来的实验提供新的阴影模板,如事件视界望远镜。为了获得阴影,向后光线跟踪算法进行了简要介绍,其次是数值例子的阴影的克尔黑洞标量头发与克尔类似物的对比。此外,克尔阴影的解析解推导出封闭形式的ZAMO观察者在任意位置。

英文摘要:

For an observer, the Black Hole (BH) shadow is the BH's apparent image in the sky due to the gravitational lensing of nearby radiation, emitted by an external source. A recent class of solutions dubbed Kerr BHs with scalar hair possess smaller shadows than the corresponding Kerr BHs and, under some conditions, novel exotic shadow shapes can arise. Thus, these hairy BHs could potentially provide new shadow templates for future experiments such as the Event Horizon Telescope. In order to obtain the shadows, the backward ray-tracing algorithm is briefly introduced, followed by numerical examples of shadows of Kerr BHs with scalar hair contrasting with the Kerr analogues. Additionally, an analytical solution for the Kerr shadow is derived in closed form for a ZAMO observer at an arbitrary position.

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。

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