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arXiv 2402.03751astro-ph.GA
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首个显示OJ 287超大质量黑洞周围存在暗物质密度尖峰的稳健证据

The first robust evidence showing a dark matter density spike around the supermassive black hole in OJ 287

Man Ho Chan, Chak Man Lee

AI总结:

本文通过分析OJ 287双星数据,首次为超大质量黑洞周围存在暗物质密度尖峰提供了稳健证据,验证了暗物质与黑洞引力相互作用的经典理论。

摘要:

黑洞动力学表明,暗物质会在超大质量黑洞附近重新分布以形成密度尖峰。然而,此前尚未发现超大质量黑洞周围存在暗物质密度尖峰的直接证据。在本文中,我们提出了首个稳健的证据,证明超大质量黑洞周围存在暗物质密度尖峰。我们重新审视了著名的超大质量黑洞双星OJ 287的数据,并表明,将超大质量黑洞周围暗物质密度尖峰引起的动态摩擦纳入考虑,可以令人满意地解释观测到的轨道衰减率。推导出的尖峰指数 $γ_{\ m sp}=2.351^{+0.03}_{-0.045}$ 与基准模型(假设超大质量黑洞绝热增长)预测的值 $γ_{\ m sp}=2.333$ 高度吻合。这为二十年前提出的、对无碰撞暗物质与超大质量黑洞之间引力相互作用进行建模的经典理论提供了强有力的验证。

英文摘要:

Black hole dynamics suggests that dark matter would re-distribute near a supermassive black hole to form a density spike. However, no direct evidence of dark matter density spike around a supermassive black hole has been identified. In this letter, we present the first robust evidence showing a dark matter density spike around a supermassive black hole. We revisit the data of the well-known supermassive black hole binary OJ 287 and show that the inclusion of the dynamical friction due to a dark matter density spike around the supermassive black hole can satisfactorily account for the observed orbital decay rate. The derived spike index $γ_{\rm sp}=2.351^{+0.032}_{-0.045}$ gives an excellent agreement with the value $γ_{\rm sp}=2.333$ predicted by the benchmark model assuming an adiabatically growing supermassive black hole. This provides a strong verification of the canonical theory suggested two decades ago modeling the gravitational interaction between collisionless dark matter and supermassive black holes.

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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