论文标题
Galex时域调查中的可变AGN
Variable AGN in the GALEX Time Domain Survey
论文作者
论文摘要
我们搜索了Galex时间域调查（TDS）的北半球田地，以指示有活性银河核（AGNS）的紫外线变异性的星系。我们从NASA Sloan Atlas（NSA）目录中的1819个星系的父样本中鉴定了48个高概率候选AGN。我们进一步使用光谱诊断，明智的IR颜色选择标准和光谱能量分布（SED）建模来进一步表征这些系统。在48个候选物中，有8个被确定为来自光学发射线的AGN，通过IR颜色鉴定了两种，并通过光谱能量分解鉴定了28个。在将这些AGN子样本连接到另一个选择时，讨论了每种选择方法的观察偏差。通过基于紫外线变异性选择AGN，我们还确定了六个低质量AGN候选者，所有这些都会被光谱选择遗漏。
We searched the Northern Hemisphere Fields of the GALEX Time-Domain Survey (TDS) for galaxies with UV variability indicative of active galactic nuclei (AGNs). We identified 48 high-probability candidate AGNs from a parent sample of 1819 galaxies in the NASA Sloan Atlas (NSA) catalog. We further characterized these systems using optical spectroscopic diagnostics, WISE IR color selection criteria, and spectral energy distribution (SED) modeling. Of the 48 candidates, eight were identified as AGNs from optical emission lines, two were identified by their IR colors, and 28 were identified through spectral energy decomposition. Observational biases of each selection method are discussed in connecting these AGNs subsamples to another. By selecting AGNs based on UV variability, we also identified six low-mass AGNs candidates, all of which would have been missed by spectroscopic selection.
