Astronomical Researches with High-level Overseas Telescopes

中村对标准恒星进行了光度观测，为MUSE-C航天器上的多波段相机进行了飞行校准，成功地获得了几颗标准恒星的数据。散斑光谱观测是由Baba在墨西哥的圣佩德罗火星天文台进行的。观测到了Be和其他有趣的双星。柴田用VLAS观测了6个兆脉泽源的核对HI的吸收。佐藤用VLBA编制了NGC3079的监测程序，研究了兆脉泽源核区的结构。田村在莫纳克亚顶部的JCMT上用旋光仪对T-Tauri星进行了亚毫米偏振测量。首次从几颗T-Tauri恒星上探测到亚毫米波极化，提供了原行星盘中磁场的信息。利用国家航空航天局的43米望远镜，佐藤在附近恒星形成区的大片区域获得了超过20000个HI光谱。Ohishi使用SEST向热分子云核搜索大环分子，并发现了可能来自呋喃的信号。Sakamoto在弧秒分辨率下观测了五个近海螺旋星系核中的分子气体，揭示了100pc分辨率下的气体分布和运动学。探测到了各种特征，包括由棒产生的气体的双峰、核气盘、推测由核星暴引起的中央气孔。窄带成像观测是由Ogura在Byurakan天体物理天文台对HerBig-Haro(HH)候选者进行的。在TMC和NGC2264中分别发现了一个显著的HH天体和一个特殊的双极星云。Nakai用VLBA绘制了Seyfert星系IC2560核区的H_(20)脉泽辐射图。结果表明，脉泽斑在核内0.1pC的致密区域沿线分布，表明有气盘绕核旋转。

Nakamura made photometric observations of the standard stars for the in-flight calibration of the multi-band camera aboard the spacecraft MUSES-C.Data for several standard stars were successfully obtained. Speckle spectroscopic observations were conducted at the San Pedro Martir Observatory in Mexico by Baba. Be and other interesting binary stars were observed. Shibata made observations of HI absorption from the nuclei of 6 megamaser sources using VLA.S.Sato made a monitoring program of NGC3079 using VLBA to investigate the structure of the nuclear region of megamaser source. Tamura conducted submillimeter polarization measurements of T Tauri stars with polarimeter on the JCMT atop of Mauna Kea. The submillmiter polarizations were positively detected for the first time from several T Tauri stars, providing information of the magnetic fields in protoplanetary disks. With the 43m telescope at NRAO, more than 20000 HI spectra were obtained in large areas of nearby star-forming regions by F.Sato. Ohishi used the SEST to search for large cyclic molecules toward hot molecular cloud cores and found a possible signal from furan. Sakamoto observed molecular gas in the nuclei of five neraby spiral galaxies at arcsecond resolution to reveal gas distribution and kinematics at < 100 pc resolutions. Various features are detecte including twin peaks of gas produced by bars, nuclear gas disks, central gas holes presumably caused by nuclear starbursts. Narrow-band Imaging observations were carried out of Herbig-Haro (HH) candidates at the Byurakan Astrophysical Observatory by Ogura. A remarkable HH object and a peculiar bipolar nebulawere discovered in TMC and NGC 2264, respectively. Nakai mapped H20 maser emission in the nuclearregion of a Seyfert galaxy IC2560, using VLBA.The result shows that maser spots are distributed along a line in the compact region of 0.1 pc in the nucleus, suggesting a gas disk rotating around the nucleus.