Astronomical Researches with High-level Overseas Telescopes

为了理解演化恒星的质量外流现象，Tamura等人对AAT的一个原行星星云进行了近红外线和圆偏振测量。为了研究银河系中心区域恒星的动力学，Deguchi等人用ANU 2.3-m红外望远镜对大约300个带有SiO脉泽的IRAs源进行了JHK成像观测。到目前为止，他们已经分析了位于银河系顶端附近的67个源的数据。近地小行星(4660)Nereus是ISAMS-C计划的目标小行星候选。Abe等人于1997年8月2/3和3/4日晚上在拉斯维加斯利用ESO/MPI 2.2米望远镜进行了光度观测。Dobashi使用安装在拉斯坎帕纳斯天文台的名古屋4M射电望远镜对CO(J=1-0)中的小圈云进行了分子观测。通过这些观测，他们揭示了分子气体的总体分布以及云层的速度结构。在1997年12月27日至1998年1月2日的5个夜晚，Hidai等人利用配备Keck10-m望远镜的HERE观测了6个类星体和2颗贫金属星的光谱。对于Ly-α受阻的类星体和[Fe/H]约为-2.5Dex的贫金属星，得到了波长范围为3600-5200A，分辨率为34000的光谱。

n order to understand the mass outflow phenomena from evolved stars, Tamura et al.have conduced near-infrared liner and circular polarimetry of a protoplanetary nebula at AAT under a good seeing condition.To study the dynamics of stars at the central region of the Galaxy, Deguchi et al.made JHK imaging observations of about 300 IRAS sources with SiO masers with ANU 2.3-m infrared telescope. Till today, they have analyzed the data of 67 sources which are located near the tip of the Galactic Bar.The Near-Earth-Asteroid (4660) Nereus is a candidate of target asteroid of MUSES-C project, an asteroid sample return mission by ISAS.Abe et al.performed photometric observations on the nights of August 2/3 and 3/4,1997 using ESO/MPI 2.2m telescope at La sSlla.Dobashi performed molecular observations toward the Circinus cloud in CO (J=1-0), using the Nagoya 4m radio telescope installed at Las Campanas observatory. Through these observations, they revealed the overall distribution of molecular gas as well as the velocity structure of the cloud. Four CO outflows were also discovered.On the 5 nights during 1997 Dec.27-1998 Jan.2, Hidai et al.observed spectra of 6 QSOs and 2 metal-deficient stars by using the HIRES equipped with the Keck 10-m telescope. The spectra with the wavelength region of 3600-5200 A and a resolution of 34000 were obtained for QSOs with dampled Ly-alpha and metal-deficient stars with [Fe/H] of about -2.5 dex.