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High-frequency monitoring of quasars with absorption lines

机译：具有吸收线的Quasars的高频监测

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An investigation of the origin of the broad absorption lines observed in some quasars was performed. We selected a sample of the most luminous objects and observed them with the VERA interferometer at 22 GHz. We also used a single 32-meter antenna, located near Torun in Poland, to monitor variability of these quasars at 30 GHz. We succeed in detecting 16 out of 19 initially selected objects. The main aim of our observations was to determine the spacial orientation of the observed sources and their evolutionary status. We investigated their radio maps, performed the variability studies, and examined their radio spectra as well as the emission in the broadband frequency range. Most of the quasars from our sample seem to evolve in a similar way to young radio objects. However, radio structures of two sources may suggest that these objects are restarted active galactic nuclei. This may indicate a diversity of evolutionary stages in our sample. Six of the investigated sources were classified as candidates for the variable objects.
机译：对一些类星体中观测到的宽吸收线的起源进行了研究。我们选择了最亮的物体样本，用VERA干涉仪在22 GHz的频率下观察它们。我们还使用了一个32米长的天线，位于波兰托伦附近，以监测这些类星体在30GHz的可变性。我们成功地检测到19个最初选定的对象中的16个。我们观察的主要目的是确定观察到的源的空间方向及其进化状态。我们调查了他们的无线电地图，进行了可变性研究，并检查了他们的无线电频谱以及宽带频率范围内的发射。我们样本中的大多数类星体似乎以类似于年轻射电天体的方式演化。然而，两个辐射源的射电结构可能表明这些天体是活动星系核。这可能表明在我们的样本中有不同的进化阶段。六个调查来源被归类为可变对象的候选来源。

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