Astrophysics Group, School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK.
Astrophysics Group, School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK. Center for Space Science and Technology, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
Science. 2015 Feb 20;347(6224):860-3. doi: 10.1126/science.1259202.
The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spherical stream of highly ionized gas in the broadband x-ray spectra of the luminous quasar PDS 456. This persistent wind is expelled at relativistic speeds from the inner accretion disk, and its wide aperture suggests an effective coupling with the ambient gas. The outflow's kinetic power larger than 10(46) ergs per second is enough to provide the feedback required by models of black hole and host galaxy coevolution.
星系的演化与它们中心超大质量黑洞的增长有关。在类星体阶段，物质落入黑洞时会释放出巨大的光度，而辐射驱动的风可以将大部分能量转移回宿主星系。在五个不同的时期，我们在明亮类星体 PDS 456 的宽带 X 射线光谱中探测到了一个近乎球形的高电离气体流的特征。这种持续的风以相对论速度从内部吸积盘喷出，其宽孔径表明它与周围气体有效耦合。外流的动能功率大于 10(46)ergs/s，足以提供黑洞和宿主星系共同演化模型所需的反馈。
