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FIRST Winged Radio Galaxies with X and Z Symmetry
The Astrophysical Journal Supplement Series ( IF 8.6 ) Pub Date : 2020-11-02 , DOI: 10.3847/1538-4365/abb367
Soumen Bera 1 , Sabyasachi Pal 2, 3 , Tapan K. Sasmal 1 , Soumen Mondal 1
Affiliation  

X-shaped radio galaxies (XRGs) 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 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.



中文翻译:

具有XZ对称性的第一个翼状射电星系

X形无线电星系(XRG)是无线电源的一个子类,它具有一对相对于主要高表面亮度波瓣成一定角度的次要低表面亮度波瓣。有时,次要的低亮度裂片从主要的高亮度裂片的边缘出现,并形成Z对称形态。我们从1.4 GHz的二十厘米(VLA FIRST)测量中的无线电天空的VLA微弱图像提供了XRG和Z形星系(ZRG)的系统搜索结果。我们的搜索总共产生296个无线电源,其中161个是XRG,135个是ZRG。我们还从不同的可用文献中对这些来源进行了光学鉴定。J1124 + 4325和J1319 + 0502分别是最远的XRG和ZRG。我们估计了这些无线电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。XRG的平均发光度高于ZRG的平均。在新发现的XRG和ZRG的大量样本的帮助下,研究了这些来源的各种统计特性。在当前论文提出的161个XRG中,FR II射电星系占70%(113),FR I射电星系占13%(20)。对于28个XRG,其形态非常复杂,无法分类。对于XRG,对长轴和短轴之间的角度以及长轴和短轴的相对大小进行统计研究。对于实际零增长方案,对角尺寸进行了统计研究。XRG的平均发光度高于ZRG的平均。在新发现的XRG和ZRG的大量样本的帮助下,研究了这些来源的各种统计特性。在当前论文提出的161个XRG中,FR II射电星系占70%(113),FR I射电星系占13%(20)。对于28个XRG,其形态非常复杂,无法分类。对于XRG,对长轴和短轴之间的角度以及长轴和短轴的相对大小进行统计研究。对于实际零增长方案,对角尺寸进行了统计研究。XRG的平均发光度高于ZRG的平均。在新发现的XRG和ZRG的大量样本的帮助下,研究了这些来源的各种统计特性。在当前论文提出的161个XRG中,FR II射电星系占70%(113),FR I射电星系占13%(20)。对于28个XRG,其形态非常复杂,无法分类。对于XRG,对长轴和短轴之间的角度以及长轴和短轴的相对大小进行统计研究。对于实际零增长方案,对角尺寸进行了统计研究。FR II射电星系占70%(113),FR I射电星系占13%(20)。对于28个XRG,其形态非常复杂,无法分类。对于XRG,对长轴和短轴之间的角度以及长轴和短轴的相对大小进行统计研究。对于实际零增长方案,对角尺寸进行了统计研究。FR II射电星系占70%(113),FR I射电星系占13%(20)。对于28个XRG,其形态非常复杂,无法分类。对于XRG,对长轴和短轴之间的角度以及长轴和短轴的相对大小进行统计研究。对于实际零增长方案,对角尺寸进行了统计研究。

更新日期:2020-11-02
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