论文标题
15.7 GHz -IV的微弱无线电源人群。核心发射在微弱的射电星系中的主导地位
The faint radio source population at 15.7 GHz -- IV. The dominance of core emission in faint radio galaxies
论文作者
论文摘要
我们向第十剑桥调查（10C）调查中选择的15.7 GHz选定的完整射电星系样本进行了15 GHz Karl G. Jansky的非常大的阵列观测。在新的观测值和低频无线电观测中，在95个来源（71％）中有67个未解决，其角度尺寸为〜2 ARCSEC。因此，在10C调查中，紧凑的射电星系或带有非常微弱的喷气机的射电星系是主要人群。这为我们以前的工作中的建议提供了支持（$ l <10^{25} \，\ textrm {w hz}^{ - 1} $）宽度星系是核心主导的，尽管需要更高分辨率的观察值才能直接确认这一点。紧凑，高频选定的射电星系的10C样品是高兴奋和低兴奋的射电星系的混合物，并显示了一系列无线电光谱形状，表明它们是混合物体的混合物。
We present 15-GHz Karl G. Jansky Very Large Array observations of a complete sample of radio galaxies selected at 15.7 GHz from the Tenth Cambridge (10C) survey. 67 out of the 95 sources (71 per cent) are unresolved in the new observations and lower-frequency radio observations, placing an upper limit on their angular size of ~2 arcsec. Thus compact radio galaxies, or radio galaxies with very faint jets, are the dominant population in the 10C survey. This provides support for the suggestion in our previous work that low-luminosity ($L<10^{25} \, \textrm{W Hz}^{-1}$) radio galaxies are core-dominated, although higher-resolution observations are required to confirm this directly. The 10C sample of compact, high-frequency selected radio galaxies is a mixture of high-excitation and low-excitation radio galaxies and displays a range of radio spectral shapes, demonstrating that they are a mixed population of objects.
