论文标题
Fanaroff-Riley II型射电星系中核心的无线电发射与宿主星系性能之间的关系
The relation between the radio emission of the core and host galaxy properties in Fanaroff-Riley type II radio galaxies
论文作者
论文摘要
我们研究了核心的无线电功率及其与高激发（HERG）和低激发（Lerg）Fanaroff-Riley II型（FRII）射线星系的样品中宿主星系的光学特性的关系。基于存在强，弱或缺乏单个无线电核心成分的存在，将射电星系样品分为两组核/非核FIRI。我们表明，与非核心的Lerg Friis相比，核心射击发射的Frii Lergs具有明显更高的[O III]线仪。 Lerg类型的核心和非核心周期的宿主在星系尺寸，浓度指数，恒星形成速率，4000-Å断裂强度，颜色，黑洞质量和黑洞到恒星质量之间没有显着差异。我们表明，射电星系的恒星质量，红移和角尺寸并不偏向结果。我们认为，与非核心的弗里斯相比，核心周期中较高的[O III]亮度的检测可能表明存在较高的气体，非常接近核心周围的AGN核，或可能是由于无线电喷气机与这种气体的相互作用而引起的。 HERG类型的核心和非核心果皮可能没有明显的差异，这可能是由于我们的样本量较小。还考虑了相对论光束对无线电亮度的影响以及重新启动AGN活性的贡献。
We study the radio power of the core and its relation to the optical properties of the host galaxy in samples of high excitation (HERG) and low excitation (LERG) Fanaroff-Riley type II (FRII) radio galaxies. The radio galaxy sample is divided into two groups of core/non-core FRII, based on the existence of strong, weak or lack of single radio core component. We show that FRII LERGs with radio emission of the core have significantly higher [O III] line luminosities compared to the non-core LERG FRIIs. There is no significant difference between the hosts of the core and non-core FRIIs of LERG type in galaxy sizes, concentration indices, star formation rates, 4000-Å break strengths, colours, black hole masses and black hole to stellar masses. We show that the results are not biased by the stellar masses, redshifts and angular sizes of the radio galaxies. We argue that the detection of higher [O III] luminosities in the core FRIIs may indicate the presence of higher amounts of gas, very close to the AGN nucleus in the core FRIIs compared to the non-core FRIIs or may result from the interaction of the radio jets with this gas. The core and non-core FRIIs of the HERG type show no significant differences perhaps due to our small sample size. The effect of relativistic beaming on the radio luminosities and the contribution of restating AGN activity have also been considered.
