INFRARED SPECTROSCOPIC STUDY OF GALAXY FORMATION PROCESS

我们用一台新研制的红外光谱仪OHS(OH气辉抑制光谱仪)对一些高红移星系和类星体进行了红外光谱观测，通过消除地球高层大气中强烈的OH气辉线，大大提高了探测能力。在这个研究过程中完成的光谱观测结果为研究星系和类星体的形成和星体的早期演化提供了关键信息，这是我们打算作为观测研究的一个主要目的。I)研究了超明亮IRAS星系的性质：FSC10214+4724，提出了一个可能被引力透镜放大的Seyfert2型的遮蔽活动星系核，ii)极红星系：夏威夷167已被证明具有非常年轻的类星体和星暴后星系的特征，iii)获得了一个强的衰减莱曼-阿尔法类星体的不同寻常的光谱特征：0201+113，量化了尘埃的含量，从而量化了介于中间的星系在3.39的高红移处的金属丰度，以及，Iv)超常发射线星系的起源：4C40.36已被一个合成的模型星系研究，以确定该星系的演化阶段。

We have made infrared spectroscopic observations of a number of high redshift galaxies and quasars with a newly developed infrared spectrograph called OHS (OH-airglow suppressor spectrograph) with appreciably enhanced detectivity by eliminating strong OH airglow lines in the telluric upper atmosphere. The results of spectroscopic observations accomplished in the course of this research program have been offerring crucial information in investigating formation and carly evolution of galaxies and quasars, as we have intended to do as a major purpose of the observational research.Individual target objects and their scientific results are briefly summarized as case studies ; i) the nature of an ultra-luminous IRAS galaxy : FSC10214+4724 has been studied, suggesting an obscured AGN of the Seyfert2 type, probably magnified by gravitational lensing, ii) The extremely red galaxy : Hawaii 167 has been shown to have characteristics of both a very young quasar and a post-starburst galaxy, iii) The unusual spectral signatures of a strong damped Lyman-alpha quasar : 0201+113 has been obtained, quantifying the content of dust and therefore the metalicity of the intervening galaxy at a high redshift of 3.39, and, iv) The origin of an extraordinary emission line galaxy : 4C40.36 has been investigated by a synthetic model galaxy to know evolutionaru stage of the galaxy.