Environments of Quasi-Stellar Objects (QSOs) and Radio Galaxies

该研究计划的主要目标是探索发光类恒星天体(QSO)和强大射电星系环境中最有可能洞察这些天体中产生活动核的物理机制的那些方面。将开展五个具体的研究项目：1.对一个小样本的陡射电谱类星体进行密集的成像和光谱研究，以了解扩展的电离气体的存在与其他观测性质之间的相关性。2.对三到四个广谱线射电星系进行的类似研究，这些星系显示了广泛扩展的电离气体。3.探测中等红移(大于0.6和小于0.9)类星体周围延长的发射线区域，以研究这一现象的演化历史。4.继续对红移在0.8到1.3之间的第三次剑桥射电调查(3CR)星系和类星体的完整样本进行深成像调查，以探索扩展发射线辐射的强度和分布与(射电星系的)连续分布和颜色以及射电结构之间的关系。5.对天鹅座A进行系统和彻底的成像和光谱研究，这将提供一些数据，这些数据将产生诊断发射线的强度比图，并更好地了解恒星和气体的运动学。

The principal objectives of the research program are to explore those aspects of the environment of luminous quasi-stellar ob- jects (QSOs) and powerful radio galaxies that seem most likely to give insights into the physical mechanisms responsible for the production of the active nucleus in these objects. Five specific research projects will be carried out: 1. An intensive imaging and spectroscopic study of a small sample of steep-radio-spectrum QSOs designed specifically to under- stand the correlation between the presence of extended ionized gas and other observed properties. 2. A similar study of three or four broad-spectral-line radio galaxies showing extensive extended ionized gas. 3. A survey to detect extended emission-line regions around intermediate-redshift (greater than 0.6 and less than 0.9) QSOs in order to study the evolutionary history of this phenomenon. 4. A continuation of a deep-imaging survey of a complete sample of Third Cambridge Radio Survey (3CR) galaxies and QSOs with redshifts between 0.8 and 1.3 to explore correlations between the strength and distribution of the extended emission-line radiation and the continuum distribution and color (for the radio galaxies) and the radio structure. 5. A systematic and thorough imaging and spectroscopic investiga- tion of Cygnus A which will provide data that will result in intensity-ratio maps for diagnostic emission lines and give a better understanding of the kinematics of the stars and gas.