Radio-continuum observations of the central regions of Sérsic–Pastoriza galaxies
Radio-continuum observations of the central regions of Sérsic–Pastoriza galaxies
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对 Sérsic-Pastoriza 星系中心区域的射电连续观测
DOI：
10.1093/mnras/270.1.46
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发表时间：
1994
影响因子：
4.8
通讯作者：
D. Axon
中科院分区：
文献类型：
--
作者：
D. Saikia;A. Pedlar;S. W. Unger;D. Axon
我们目前的无线电连续观测，与VLA A-阵列在20厘米和B-阵列在6厘米，47个Sérsic-Pastoriza星系的样本，其中27个被检测到。那些在可见光波段中心区域有明亮的核心和明确的热点的星系最有可能以这种方式被探测到。射电辐射通常起源于致密的成分，其中大部分可能是发生在高星星形成率区域的超新星遗迹（SNRs）。这些特徴的光度在6cm处介于108.5~1021W Hz-1之间，明显高于我们银河系和M82的信噪比。在一些来源中，我们发现了在无线电波段的核区域中存在环状或螺旋状图案的证据。我们讨论了这种结构的可能起源，并试图确定这些星系可能有一个活动星系核（AGN）。
We present radio-continuum observations, made with the VLA A-array at 20 cm and with the B-array at 6 cm, of a sample of 47 Sérsic-Pastoriza galaxies, 27 of which were detected. Those with a bright nucleus and well-defined hotspots in the central region at optical wavelengths are the most likely to be detected in this way. The radio emission often originates in compact components, most of which are likely to be supernova remnants (SNRs) occurring in regions of high star formation rate. The luminosities of these features range from ∼108.5to 1021W Hz-1at 6 cm, which is significantly higher than SNRs in our own Galaxy as well as those in M82. In a number of sources we find evidence of a ring or spiral-like pattern in the nuclear region at radio wavelengths. We discuss the possible origin of such structures, and attempt to identify those galaxies that are likely to have an active galactic nucleus (AGN).