论文标题
有点寓言：使用宇宙学模拟探索矮星系中的AGN反馈
A little FABLE: exploring AGN feedback in dwarf galaxies with cosmological simulations
论文作者
论文摘要
与标准知识相反，有越来越多的观察证据表明，活跃银河核（AGN）的反馈也可能在星系群的低质量端发挥作用。我们使用宇宙仿真套件寓言进行了调查，特别关注矮人制度（$ m_ \ mathrm {stellar} <10^{9.5} \ \ \ \ \ \ \ \ \ \ \ \ mathrm {m _ {\ odot}} $）。我们发现，对于与宿主星系的平均缩放关系，过度质量的黑洞（BHS），驱动更热，更快的流出并导致气体质量分数大大减少。他们也更有可能在我们的模拟漫画速度图中显示运动学错位的离子气体成分，尽管我们警告宇宙流入和合并也会导致未对准。虽然在当地宇宙中，矮人中的大多数AGN比出色的组成部分要昏暗，而对于$ z \ geq 2 $，有很大的人口远远超过了他们的寄宿。这些高红移过度质量的BHS有助于矮人的淬火，而在宇宙后期，超新星（SN）反馈更有效。虽然我们的结果总体上与矮人中AGN的X射线观察非常吻合，但在低红移时寓言中缺乏高光度X射线AGN凸显了一种有趣的可能性，即SN反馈在寓言的矮人中可能太强烈，从而使AGN的增长和反馈变得简化。我们预测，未来的观察结果可能会发现较低的亮度和较高红移的矮人中更多的AGN。
Contrary to the standard lore, there is mounting observational evidence that feedback from active galactic nuclei (AGN) may also play a role at the low-mass end of the galaxy population. We investigate this using the cosmological simulation suite FABLE, with a particular focus on the dwarf regime ($M_\mathrm{stellar} < 10^{9.5} \ \mathrm{M_{\odot}}$). We find that overmassive black holes (BHs), with respect to the mean scaling relations with their host galaxies, drive hotter and faster outflows and lead to significantly reduced gas mass fractions. They are also more likely to display a kinematically misaligned ionized gas component in our mock MaNGA velocity maps, although we caution that cosmic inflows and mergers contribute to misalignments as well. While in the local Universe the majority of AGN in dwarfs are much dimmer than the stellar component, for $z \geq 2$ there is a significant population that outshines their hosts. These high-redshift overmassive BHs contribute to the quenching of dwarfs, whereas at late cosmic times supernova (SN) feedback is more efficient. While our results are overall in good agreement with X-ray observations of AGN in dwarfs, the lack of high-luminosity X-ray AGN in FABLE at low redshifts highlights an interesting possibility that SN feedback could be too strong in FABLE's dwarfs, curtailing AGN growth and feedback. We predict that future observations may uncover many more AGN in dwarfs with lower luminosities and at higher redshifts.
