论文标题
带有X和Z对称性的第一个有翼的射电星系
FIRST winged radio galaxies with X and Z symmetry
论文作者
论文摘要
X形射线星系是无线电源的子类，它们表现出一对二级低表面亮度无线电裂片，与初级高表面亮度裂片的角度为角度。有时，次级低亮叶从主要高亮叶的边缘出现，形成Z形态的形态。我们从1.4 GHz的21秒（VLA First）调查中，从无线电天空的VLA微弱图像中提出了X形射线星系（XRGS）和Z形射电星系（ZRG）的系统搜索结果。我们的搜索总共产生了296个无线电数量，其中161个为XRG，而135个为ZRG。我们还通过不同的可用文献对这些来源进行了光学识别。 J1124+4325和J1319+0502分别是已知的XRG和ZRG。我们已经估计了这些无线电来源的光谱指数和无线电发光度，并与先前检测到的XRG和ZRG进行了比较研究。 XRGS的发光度的平均值高于ZRG。在新发现的XRG和ZRG的大量样本量的帮助下，研究了这些来源的各种统计特性。在当前论文中提出的161个XRG中，有70％（113）是FR II射电星系，而13％（20）是FR I射电星系。对于28个XRG，形态很复杂，无法分类。对于XRG，进行统计研究是在主要轴和后轴之间的角度以及主要轴和次要轴的相对大小之间进行的。对于ZRGS，对角度大小进行了统计研究。
X-shaped radio galaxies are a subclass of radio sources that exhibit a pair of secondary low surface brightness radio lobes oriented at an angle to the primary high surface brightness lobes. Sometimes, the secondary low brightened lobes emerge from the edges of the primary high brightened lobes and form a Z-symmetric morphology. We present a systematical search result for X-shaped radio galaxies (XRGs) and Z-shaped radio galaxies (ZRGs) from the VLA Faint Images of the Radio Sky at Twenty-Centimeters (VLA FIRST) Survey at 1.4 GHz. Our search yields a total of 296 number of radio sources, out of which 161 are XRGs and 135 are ZRGs. We have also made optical identification of these sources from the different available literature. J1124+4325 and J1319+0502 are the farthest known XRG and ZRG, respectively. We have estimated spectral index and radio luminosity of these radio sources and made a comparative study with previously detected XRGs and ZRGs. The average value of luminosities for XRGs is higher than that of ZRGs. With the help of a large sample size of the newly discovered XRGs and ZRGs, various statistical properties of these sources are studied. Out of 161 XRGs presented in the current paper, 70% (113) are FR II radio galaxies and 13% (20) are FR I radio galaxies. For 28 XRGs, the morphology is complex and could not be classified. For XRGs, the statistical studies are done on the angle between the major axis and minor axis and the relative size of the major and minor axes. For the ZRGs a statistical study is done on the angular size.
