论文标题
FR 0射电星系的大规模环境
The large-scale environment of FR 0 radio galaxies
论文作者
论文摘要
我们探讨了属于FR0CAT样品的FR0射电星系的大规模环境的性质，该环境包括104个与附近（Z <0.05）早期型星系相关的紧凑型无线电源。通过使用各种估计量，我们发现FR0生活在高于平均星系密度的区域，并且相对于周五射电星系平均而言，平均而言，平均而言。后者的差异是由少于15个星系组成的组的大部分（63％）驱动的，这种环境很少居住（17％）。除了缺乏明显的扩展无线电发射定义FR0类别外，这是这两个低功率射电星系种群的性质之间的第一个显着差异。我们将FR0和Fris之间的环境差异解释为由于局部星系密度，BH旋转，喷射功率和扩展无线电发射之间的进化连接所致。
We explore the properties of the large-scale environment of FR0 radio galaxies belonging to the FR0CAT sample which includes 104 compact radio sources associated with nearby (z<0.05) early-type galaxies. By using various estimators we find that FR0s live in regions of higher than the average galaxies density and a factor two lower density, on average, with respect to FRI radio galaxies. This latter difference is driven by the large fraction (63%) of FR0s located in groups formed by less than 15 galaxies, an environment which FRIs rarely (17%) inhabit. Beside the lack of substantial extended radio emission defining the FR0s class, this is the first significant difference between the properties of these two populations of low power radio galaxies. We interpret the differences in environment between FR0s and FRIs as the due to an evolutionary link between local galaxies density, BH spin, jet power, and extended radio emission.
