论文标题
搜索TGSS ADR 1的X/Z形无线电源
Search for X/Z-shaped radio sources from TGSS ADR 1
论文作者
论文摘要
一小部分射电星系，表现出一对次级低表面亮度无线电裂片，以与一级高表面亮度叶角度为方面，称为X形射线星系（XRGS）。在情况下，可以看出，较不发光的次级裂片从原发性高亮叶的边缘出现，并具有Z形态的形态。这些被称为Z形射电星系（ZRGS）。从150 MHz的TIFR GMRT Sky Sky调查中，我们提供了XRGS和ZRGS的系统搜索结果。我们总共确定了58个无线电来源，其中40个是XRG，而18个是ZRG。利用当前论文中报道的XRGS和ZRG的大样本量，研究了XRG和ZRG的不同特性。在当前论文中介绍的58个XRG和ZRG中，有19（32％）为FR-I，33（57％）是FR-II射电星系。对于四个XRG和三个ZRG，形态是如此复杂，无法分类。我们估计了新发现的有翼射线星系的无线电发光度和光谱指数，并与先前检测到的XRGS和ZRG进行了比较研究。大多数XRG在150 MHz和1400 MHz之间显示出陡峭的频谱指数，并且只有14％的源显示出平坦的光谱，但对于ZRG，很大一部分源（36％）显示出平坦的光谱。
A small sub-class of radio galaxies that exhibit a pair of secondary low surface brightness radio lobes oriented at an angle to the primary high surface brightness lobes are known as X-shaped radio galaxies (XRGs). In cases, it is seen that the less luminous secondary lobes emerge from the edges of the primary high brightened lobes and give a Z-symmetric morphology. These are known as Z-shaped radio galaxies (ZRGs). From the TIFR GMRT Sky Survey at 150 MHz, we present a systematic search result for XRGs and ZRGs. We identified a total of 58 radio sources, out of which 40 are XRGs and 18 are ZRGs. Taking advantage of the large sample size of the XRGs and ZRGs reported in the current paper, different properties of XRGs and ZRGs are studied. Out of 58 XRGs and ZRGs presented in the current paper, 19 (32 per cent) are FR-I and 33 (57 per cent) are FR-II radio galaxies. For four XRGs and three ZRGs, the morphology is so complex that they could not be classified. We have estimated radio luminosity and spectral index of newly discovered winged radio galaxies and made a comparative study with previously detected XRGs and ZRGs. Most of the XRGs show a steep spectral index between 150 MHz and 1400 MHz and only 14 per cent of the sources show a flat spectrum but for ZRGs, a good fraction of the sources (36 per cent) show a flat spectrum.
