论文标题
升级的GMRT观测值的昏迷星系群：观测值
Upgraded GMRT observations of the Coma cluster of galaxies: The observations
论文作者
论文摘要
我们已经使用了升级的巨型Metrewave射电望远镜，以250-500 MHz和1050-1450 MHz频段绘制星系昏迷。这些6.26 ARCSEC和2.18 ARCSEC的分辨率观测值允许确定所有检测到的无线电源，这些无线电源既显示出离散的点状和扩展形态。我们介绍了32个最明亮的（磁通密度> = 30 mjy）和主要来源的子集的图像，几个来源显示出离散的点状无线电形态。我们发现，在大多数来源中，光谱与同步加速器冷却一致，光谱指数中位数为-0.78，这表明〜59％的源具有陡峭的光谱。随后的论文将讨论昏迷集群中无线电源的性质和统计特性。
We have used the upgraded Giant Metrewave Radio Telescope to map the Coma cluster of galaxies at 250-500 MHz and 1050-1450 MHz bands. These 6.26 arcsec and 2.18 arcsec resolutions observations allow detailed radio structures to be determined of all detected radio sources that show both discrete pointlike and extended morphologies. We present images of a subset of 32 brightest (flux density >= 30 mJy) and dominant sources, and several sources show discrete pointlike radio morphologies. We find the steepening of the spectra consistent with synchrotron cooling in the majority of sources and the median for spectral indices is -0.78, suggesting that ~59% sources have steep spectra. The nature and the statistical properties of the radio sources in the Coma cluster will be discussed in subsequent papers.
