论文标题
伽马射线发射的活性银核的新样品
A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei
论文作者
论文摘要
我们考虑了费米大面积望远镜（LAT）生产的伽马射点源的第四个目录，仅选择了喷射的活性银河核（AGN）或没有特定分类的源，但具有低频对应物。我们的最终列表由2980个伽玛射线点源组成。然后，我们在所有可用文献和公开数据库中搜索了光谱，以测量红移并确认或更改原始的LAT分类。我们的最终伽马射线发射喷射AGN列表由BL LAC对象（40％），扁平光谱无线电类星体（23％），未对准AGN（2.8％），窄线Seyfert 1，Seyfert和低离子化核发射线区域（1.9％）。我们还发现大量的对象从一种类型变为另一种类型，反之亦然（更改外观AGN，1.1％）。大约30％的伽马射线来源仍然具有模棱两可的分类或完全缺乏分类。
We considered the fourth catalog of gamma-ray point sources produced by the Fermi Large Area Telescope (LAT) and selected only jetted active galactic nuclei (AGN) or sources with no specific classification, but with a low-frequency counterpart. Our final list is composed of 2980 gamma-ray point sources. We then searched for optical spectra in all the available literature and publicly available databases, to measure redshifts and to confirm or change the original LAT classification. Our final list of gamma-ray emitting jetted AGN is composed of BL Lac Objects (40%), flat-spectrum radio quasars (23%), misaligned AGN (2.8%), narrow-line Seyfert 1, Seyfert, and low-ionization nuclear emission-line region galaxies (1.9%). We also found a significant number of objects changing from one type to another, and vice versa (changing-look AGN, 1.1%). About 30% of gamma-ray sources still have an ambiguous classification or lack one altogether.
