论文标题
在亚弧形分离处揭示双重和镜头的人口
Unveiling the population of dual- and lensed- AGNs at sub-arcsec separations
论文作者
论文摘要
所有结构形成的宇宙学模型都预测了其普通宿主银河系中广泛的双重质量黑洞的存在，最终融合并引起了强烈的引力波。这些系统可以在千帕斯克分离时被识别为双重AGN，但在z> 0.5时只有很少的确认。在小角度分离下多个AGN的出现也可能是由于单个AGN的重力镜头，这本身对于许多天体物理主题来说都是非常重要的系统。在这里，我们提出了一种新型技术，称为Gaia MultipeAk（GMP）方法，以获取具有亚弧形分离的双/透镜AGN候选的大型可靠样品，通过寻找盖亚卫星观察到的光谱中的多个峰。所有具有高分辨率图像的GMP选择的源（来自HST档案库的26个，在大型双筒望远镜下的专用自适应式辅助成像中显示了多个组件，这些组件具有亚弧形分离，指向该方法的可靠性很高。通过在z> 1处将分隔降低至〜2 kpc，此方法使我们能够探测一个在单个星系中驱动一对SMBH的灵感的物理过程。
All cosmological models of structure formation predict the existence of a widespread population of dual supermassive black holes in-spiralling inside their common host galaxy, eventually merging and giving rise to intense gravitational waves. These systems can be identified as dual AGNs at kilo parsec separations, but only very few have been confirmed at z>0.5. The appearance of multiple AGNs at small angular separations can also be due to gravitational lensing of single AGNs, which are themselves very important systems for many astrophysical topics. Here we present a novel technique, dubbed the Gaia Multipeak (GMP) method, to obtain large and reliable samples of dual/lensed AGN candidates with sub-arcsec separations by looking for AGNs showing multiple peaks in the light profiles observed by the Gaia satellite. All the GMP-selected sources with high resolution images (26 from the HST archive and 5 from dedicated adaptive-optics assisted imaging at the Large Binocular Telescope) show multiple components with sub-arcsec separation pointing toward a very high reliability of the method. By sampling separations down to ~2 kpc at z>1, this method allows us to probe the physical processes that drive the inspiralling of a pair of SMBHs inside a single galaxy.
