一条通往银河核的新路线：温暖的晕云影响
A new delivery route to Galactic Nuclei: Warm halo cloud impacts
摘要：
我们提出了一种新的机制，气体输送到星系核的心脏。我们表明，温暖的晕云必须定期影响银河系中心，并可能提供一个大的（~10^{4-6} M_{solar}）质量的气体的星系核在一个单一的事件。源自遥远的星系晕的吸积暖晕云的影响，取决于混合，可以产生低金属丰度恒星的核星暴以及低光度吸积到中央黑洞上。基于LambdaCDM分布晕周围的多相冷却，我们计算了核碰撞率、中心黑洞捕获的质量以及碰撞云质量在~10^{4}-10 ^6} M_{solar}范围内的活动核所占的比例。如果有中度制动过程中的云落，我们的模型预测的低光度活动核的平均分数与观测一致。
英文摘要：
We propose a new mechanism for the delivery of gas to the heart of galactic nuclei. We show that warm halo clouds must periodically impact galactic centers and potentially deliver a large (~10^{4-6} M_{solar}) mass of gas to the galactic nucleus in a singular event. The impact of an accreting warm halo cloud originating far in the galactic halo can, depending on mixing, produce a nuclear starburst of low metallicity stars as well as low luminosity accretion onto the central black hole. Based on multiphase cooling around a LambdaCDM distribution of halos we calculate the nuclear impact rate, the mass captured by the central black hole and the fraction of active nuclei for impacting cloud masses in the range ~10^{4}-10^{6}M_{solar}. If there is moderate braking during cloud infall, our model predicts an average fraction of low luminosity active nuclei consistent with observations.
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。
