强大的活动星系核对恒星形成的抑制
The suppression of star formation by powerful active galactic nuclei
摘要：
构成星系凸出部分的古老的红色恒星，以及它们中心的大质量黑洞，是宇宙历史上一个时期的遗迹，当时星系以惊人的速度形成恒星，活动星系核（AGN）因吸积到黑洞上而发出明亮的光芒。人们普遍怀疑，但未经证实的是，黑洞和恒星成分的质量紧密相关是由于活动星系核在接近其峰值亮度时淬灭了周围的恒星形成。X射线可以清晰地追踪活动星系核的辐射，而强大的恒星形成星系通常被尘埃遮蔽，并且在红外到亚毫米波长处最亮。在这里，我们报告了在亚毫米波段和X射线波段的观测结果，这些观测结果表明，当宇宙的年龄为2-6光年时，活动星系核的宿主星系中快速的恒星形成是很常见的，但是在X射线光度超过10^44 erg/s的黑洞周围并没有观测到最活跃的恒星形成。这种在强大活动星系核的宿主星系中抑制恒星形成的现象，是活动星系核驱动强大外流，驱逐宿主星系的星际介质，并在宇宙时间的短暂时期内改变星系性质的模型的关键预测。
英文摘要：
The old, red stars which constitute the bulges of galaxies, and the massive black holes at their centres, are the relics of a period in cosmic history when galaxies formed stars at remarkable rates and active galactic nuclei (AGN) shone brightly from accretion onto black holes. It is widely suspected, but unproven, that the tight correlation in mass of the black hole and stellar components results from the AGN quenching the surrounding star formation as it approaches its peak luminosity. X-rays trace emission from AGN unambiguously, while powerful star-forming galaxies are usually dust-obscured and are brightest at infrared to submillimetre wavelengths. Here we report observations in the submillimetre and X-ray which show that rapid star formation was common in the host galaxies of AGN when the Universe was 2-6 Gyrs old, but that the most vigorous star formation is not observed around black holes above an X-ray luminosity of 10^44 erg/s. This suppression of star formation in the host galaxies of powerful AGN is a key prediction of models in which the AGN drives a powerful outflow, expelling the interstellar medium of its host galaxy and transforming the galaxy's properties in a brief period of cosmic time.
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。
