类型1活性星系双峰[O III]的研究：I.数据样本与基本结果
摘要
双峰窄发射线（DPNEL）可能是 kpc尺度双活性星系（dual AGN）存在的证据。目前已有大量含有DPNEL的窄发射线星系样本。本文系统搜索了来自Sloan Digital Sky Survey（SDSS）数据释放版16中含有双峰[O III]的类型1活性星系样本。通过视觉检查和拟合[O III]、拟合宽Hα发射线、对[O III]轮廓进行F检验以及检查宽Hβ和[O III]发射线，我们从11557个z<0.3的QSO中选出62个可靠的双峰[O III]类型1活性星系。 After visually checking the 62 SDSS multi-color images, we find only seven objects with signs of merging. Four possible models for the double-peaked [O III] observed in our sample are discussed: the superposition model, AGN outflow model, dual AGN model, and rotating disk model. However, the current results can not provide any one explanation conclusively, and additional observational data are needed to provide the details of narrow line regions. But at least 22 objects with different velocity offsets between double-peaked [O III] and narrow Hα emission lines could be excluded as dual AGN candidates. The relative velocity offsets of the [O III] blue-shifted/red-shifted components are negative to their line flux ratios, which is consistent with dual AGN model. This work provides a new sample of 62 type 1 AGNs with double-peaked [O III] for further study.
引用
@article{arxiv.2502.15299,
title = {On type 1 active galactic nuclei with double-peaked [O~{\sc iii}]. I. data sample and basic results},
author = {Qi Zheng and Yansong Ma and Xueguang Zhang and Qirong Yuan and Weihao Bian},
journal= {arXiv preprint arXiv:2502.15299},
year = {2025}
}
备注
38 pages, 15 figures, accepted to be published in ApJS