论文标题
从TGSS ADR 1发现巨型无线电来源：无线电，光学和红外属性
Discovery of giant radio sources from TGSS ADR 1: radio, optical, and infrared properties
论文作者
论文摘要
巨型无线电来源（GRS）是宇宙中已知的最大的天体物理对象，它已生长到Megaparsec尺度（$ \ ge $ 0.7 MPC）。与正常大小的射电星系相比，GRS稀有得多。尽管如此，他们的巨型大小的形成的原因仍在辩论中。我们系统地从TIFR GMRT Sky Sumper externative Data Release 1（TGSS ADR 1）中系统地搜索GRS，该GRS处于150 MHz。我们从这项研究中新发现了34个GRS。我们还研究了这些GRS的多波长特性（无线电，光学和红外线）。我们已经使用了似然比方法来识别Pan-Starrs（光学）和Wise（Mid-IR）数据的GRS的高度可靠的多波长对应物。我们使用光学和MID-IR数据根据中央黑洞的积聚模式对GRS进行了分类。对于所有来源，我们还讨论了主要特征参数（红移分布，角度和投影线性大小，总集成无线电通量密度，光谱指数和无线电功率）。我们显示了无线电演化轨道和P-D图中GRS的位置。使用放射光亮度图，我们在Fanaroff-Riley分类中识别GRS。我们的样本中只有两个GRG靠近星系簇中心。
Giant radio sources (GRSs) are the single largest astrophysical objects known in the universe that have grown to megaparsec scales ($\ge$ 0.7 Mpc). GRSs are much rarer compared with normal-sized radio galaxies. Still, the reason for the formation of their gigantic sizes is under debate. We systematically search for GRSs from the TIFR GMRT Sky Survey Alternative Data Release 1 (TGSS ADR 1) at 150 MHz. We have newly identified 34 GRSs from this study. We have also studied the multi-wavelength properties (radio, optical, and infrared) of these GRSs. We have used the likelihood ratio method to identify highly reliable multi-wavelength counterparts of GRSs from Pan-STARRS (optical) and WISE (mid-IR) data. We have classified GRSs based on their accretion mode of the central black holes using optical and mid-IR data. For all sources, we also discuss the principal characteristic parameters (redshift distribution, angular and projected linear size, total integrated radio flux density, spectral index, and radio power). We show the radio evolution track and the location of the GRSs in the P-D diagram. Using a radio-optical luminosity diagram, we identify GRSs in the Fanaroff-Riley classification. Only two GRGs in our sample reside close to the centres of galaxy clusters.
