论文标题
恒星质量黑洞周围暗物质密度峰值的间接证据
Indirect Evidence for Dark Matter Density Spikes around Stellar-Mass Black Holes
论文作者
论文摘要
长期以来，暗物质会在黑洞周围形成密度尖峰。但是，到目前为止，尚未观察到有希望的证据来验证这一理论建议。在这里，我们报告了附近两个恒星质量黑洞（A0620-00和XTE J1118+480）周围的暗物质密度尖峰的存在。暗物质和伴侣恒星之间的动态摩擦可以令人满意地解释两个二进制文件中异常快速轨道的衰变。 A0620-00和XTE J1118+480的计算出的尖峰索引为$γ= 1.71^{+0.01} _ { - 0.02} $和$γ= 1.85^{+0.04} _ { - 0.04} _ { - 0.04} $，由下较低的制度模型，并通过较低的制度进行了模型。它可能提供可能间接证据表明恒星质量黑洞周围存在暗物质密度尖峰。我们预计分析附近黑洞X射线二进制文件的观察数据将是一种揭示暗物质本质的新方法。
It has been suggested for a long time that dark matter would form a density spike around a black hole. However, no promising evidence has been observed so far to verify this theoretical suggestion. Here, we report the existence of a dark matter density spike around each of the two nearby stellar-mass black holes (A0620-00 and XTE J1118+480). The dynamical friction between dark matter and the companion stars can satisfactorily explain the abnormally fast orbital decays in the two binaries. The calculated spike index for A0620-00 and XTE J1118+480 are $γ=1.71^{+0.01}_{-0.02}$ and $γ=1.85^{+0.04}_{-0.04}$ respectively, which are close to the lower regime predicted by the stellar heating model. It may provide a possible indirect evidence for the existence of dark matter density spikes around stellar-mass black holes. We anticipate that analyzing observational data of nearby black hole X-ray binaries would be a new way to reveal the nature of dark matter.
