利用LAMOST巡天的光谱数据搜寻和研究双峰窄发射线星系/类星体

Double-peaked narrow emission-line (NEL) galaxies/QSOs are objects with the existence of double-peaked structure in the narrow emission lines. It is now widely accepted that most bulge-dominated galaxies host central supermassive black holes (SMBHs) and that galaxies frequently merge with one another. Therefore massive black hole pairs are the natural outcome of mergers through the hierarchical formation of galaxies. While double-peaked NEL profiles can be caused not only by dual active galactic nuclei (AGNs) but also by other physical scenarios. Kinematics such as outflow or rotation of the narrow line region (NLR) can also product double-peaked emission lines. The study of double-peaked NEL galaxies/QSOs provides us with important information on the dynamics of NLRs driven by outflows and a rotating disk, on the dynamics of merging galaxies, on the triggering mechanism of BH activity, on checking the hierarchical growth of galaxies, and on confining the stellar and gaseous dynamical models. This project plans to search double-peaked NEL galaxies/QSOs from the spectral survey of LAMOST and to study their physical properties. Firstly, this project will select double-peaked NEL galaxies/QSOs candidates from massive LAMOST spectra of galaxies and QSOs with a series of criteria. Secondly, this project will analyze the possible dynamical mechanisms on their birth through measuring the spectral parameters. Thirdly, this project will particularly research the physical features of their host galaxies and of the NLRs. Finally, this project will also cross-identify these candidates with other surveys (such SDSS), and make use of the parameters to re-check the reliability of these candidates, to verify the dynamical mechanisms on their birth, and to assistant analyze the physical features of their host galaxies and the NLRs.

双峰窄发射线星系/类星体是一类窄发射线具有双峰特征的源，其产生机制有：双活动星系核、由星暴或活动星系核辐射压驱动的双极外流、旋转的盘状窄线区。通过对这类源的研究，可以帮我们研究外流和/或旋转盘驱动的窄线区的动力学特征、并合星系动力学特征、黑洞活动触发机制、检验星系等级增长的演化模型、限制恒星与气体动力学模型。该课题计划在LAMOST巡天的光谱数据中搜寻和研究双峰窄发射线星系/类星体。首先，该课题将通过一系列标准从 LAMOST星系和类星体光谱中选出双峰窄发射线星系/类星体候选体。其次，该课题将通过计算候选样本的光谱参数，分析双峰窄发射线特征的产生机制。再次，该课题将深入研究候选样本的寄主星系的物理特征和窄线区的物理特征。最后，该课题还将利用其他巡天数据的相关物理参数，检验从LAMOST所选双峰窄发射线星系/类星体的可靠性、对其产生机制的验证、对其寄主星系和窄线区物理性质进行辅助分析。

本项目旨在搜寻双峰窄发射线星系/类星体，该课题计划在LAMOST巡天的光谱数据中搜寻和研究双峰窄发射线星系/类星体。首先，通过一系列标准从 LAMOST星系和类星体光谱中选出双峰窄发射线星系/类星体候选体。其次，通过计算候选样本的光谱参数，分析双峰窄发射线特征的产生机制。再次，深入研究候选样本的寄主星系的物理特征和窄线区的物理特征。最后，利用其他巡天数据的相关物理参数，检验从LAMOST所选双峰窄发射线星系/类星体的可靠性、对其产生机制的验证、对其寄主星系和窄线区物理性质进行辅助分析。研究对象是一类窄发射线具有双峰特征的源，其产生机制有多种：双活动星系核、由星暴或活动星系核辐射压驱动的双极外流、旋转的盘状窄线区。通过对这类源的研究，可以帮我们研究外流和/或旋转盘驱动的窄线区的动力学特征、并合星系动力学特征、黑洞活动触发机制、检验星系等级增长的演化模型、限制恒星与气体动力学模型。该课题计划在LAMOST巡天的光谱数据中搜寻和研究双峰窄发射线星系/类星体。项目执行的三年期间，在搜寻方法和科学目标方面都有所突破。并利用LAMOST发布的光谱数据，撰写了2篇SCI收录的文章。