Optical and radio properties of extragalactic radio sources with recurrent jet activity
Optical and radio properties of extragalactic radio sources with recurrent jet activity
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具有经常性喷流活动的河外射电源的光学和射电特性
DOI：
10.1093/mnras/stx1830
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发表时间：
2017
影响因子：
4.8
通讯作者：
M. Weżgowiec
中科院分区：
文献类型：
--
作者：
A. Kuźmicz;A. Kuźmicz;M. Jamrozy;D. Kozieł;M. Weżgowiec
我们提出了一个样本的74个无线电源经常性喷流活动。该样本包括67个星系，2个类星体和5个未识别的来源，从已公布的数据中选择或新识别的。样品的红移范围为0.002 < z < 0.7，内部和外部结构的大小从0.02到4248 kpc不等。我们分析了样品的光学和射电性质，并将其与普通的一次性FRII射电源的特性进行了比较。借助恒星布居模型，我们计算了35个重启射电源的黑洞质量和宿主星系的恒星质量，发现重启射电源的黑洞质量与典型的单周期FRII射电源相当。得到的log M$_{BH}$的中值分别为8.58和8.62 M$_{\odot}$与黑洞质量不同，在重新启动的射电源中的恒星质量往往小于FRII源。虽然经常性活动源的宿主的恒星群体主要是由老恒星，也可以观察到很大一部分的年轻恒星。基于斯隆数字巡天光度观测，我们还分析了宿主星系的形态，并获得了显着较小的浓度指数相比，经典FRII主机的重新启动的射电源。这种效应可以解释为宿主星系历史上频繁的合并事件重新启动射电源的结果。
We present a sample of 74 radio sources with recurrent jet activity. The sample consists of 67 galaxies, 2 quasars and 5 unidentified sources, selected from the published data or are newly recognized. The sample's redshift range is 0.002 < z < 0.7 and the size of inner and outer structures varies from 0.02 to 4248 kpc. We analyse the optical and radio properties of the sample and compare them with the characteristics of ordinary one-off FRII radio sources. With the help of stellar population modelling, we derive black hole masses and stellar masses of host galaxies of 35 restarting radio sources, finding that the black hole masses in restarting radio sources are comparable to those of typical single-cycle FRII radio sources. The obtained median values of log M$_{BH}$ are 8.58 and 8.62 M$_{\odot}$ Unlike the black hole masses, the stellar masses in restarting radio sources tend to be smaller than in the FRII sources. Although the stellar populations of the hosts of recurrent activity sources are dominated by old stars, a significant fraction of young stars can be observed as well. Based on the Sloan Digital Sky Survey photometric observations, we also analyse the morphology of the host galaxies and obtained significantly smaller concentration indices for the restarting radio sources when compared to the classical FRII hosts. This effect can be interpreted as a result of frequent merger events in the history of host galaxies of restarting radio sources.
斯隆数字巡天第十次数据发布：来自 SDSS-III 阿帕奇点天文台银河演化实验的首个光谱数据
DOI：
10.1088/0067-0049/211/2/17
发表时间：
2014
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
Ahn C
通讯作者：
Ahn C