论文标题
超级质量黑洞的射击及其对模糊黑物子中的合并率的影响
Ejection of supermassive black holes and implications for merger rates in fuzzy dark matter haloes
论文作者
论文摘要
在寒冷的暗物质情景下，已经调用了由超光轴组成的模糊暗物质（FDM），以减轻银河尺度问题。通过波的叠加产生的FDM波动会影响浸入FDM Halo中的中央超级质量黑洞（SMBH）的运动。 SMBH将经历FDM波动引起的随机步行，这可能导致其从中央区域射出。矮星系中，这种效果最强，涉及流浪的SMBH和矮球星系中AGN的低检测率。此外，推断出允许的轴上质量的下限对于射手座$ a^*$和较重的SMBH推断。为了避免从银河中心射击，排除了$ 10^{ - 22} {\ rm ev} $的轴质量或打火机的轴向质量。合并星系可以推断出更强的限制。我们发现，FDM光环中SMBH合并的事件速率和相关的SMBH增长率至少可以降低至少一个数量级。
Fuzzy dark matter (FDM) consisting of ultra-light axions has been invoked to alleviate galactic-scale problems in the cold dark matter scenario. FDM fluctuations, created via the superposition of waves, can impact the motion of a central supermassive black hole (SMBH) immersed in an FDM halo. The SMBH will undergo a random walk, induced by FDM fluctuations, that can result in its ejection from the central region. This effect is strongest in dwarf galaxies, accounting for wandering SMBHs and the low detection rate of AGN in dwarf spheroidal galaxies. In addition, a lower bound on the allowed axion masses is inferred both for Sagittarius $A^*$ and heavier SMBH; to avoid ejection from the galactic centres, axion masses of the order of $10^{-22}{\rm eV}$ or lighter are excluded. Stronger limits are inferred for merging galaxies. We find that the event rate of SMBH mergers in FDM haloes and the associated SMBH growth rates can be reduced by at least an order of magnitude.
