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Astronomical Researches with High-level Overseas Telescopes

海外高水平望远镜天文研究

基本信息

批准号：
10041131
负责人：
KODAIRA Keiichi
金额：
$ 2.24万
依托单位：
National Astronomical Observatory of Japan
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1998
资助国家：
日本
起止时间：
1998 至无数据
项目状态：
已结题

项目摘要

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.

中村对标准星进行了光度观测，以便在飞行中校准MUSES-C号航天器上的多波段照相机。斑点光谱观测是巴巴在墨西哥的圣佩德罗马蒂尔天文台进行的。Be和其他有趣的双星被观测到。柴田用VLBA观测了6个超脉泽源核的HI吸收，佐藤用VLBA监测了NGC 3079，研究了超脉泽源的核区结构。田村在莫纳克亚山顶的JCMT上用偏振计对金牛座T星进行了亚毫米偏振测量。首次从几颗金牛座T星上探测到亚毫米波偏振，提供了原行星盘磁场的信息。F. Sato用NRAO的43米望远镜在附近的大面积恒星形成区获得了20000多个HI谱。Ohishi使用SEST来寻找大的环状分子朝向热分子云核心，并发现了来自呋喃的可能信号。坂本在角秒分辨率下观测了5个neraby螺旋星系核中的分子气体，以揭示气体分布和运动学，分辨率< 100 pc。探测到了各种各样的特征，包括由棒产生的气体双峰、核气体盘、可能由核星爆引起的中心气体孔。小仓在Byurakan天体物理观测站对赫比格-哈罗（HH）候选者进行了窄带成像观测。在TMC和NGC 2264中分别发现了一个引人注目的HH天体和一个奇特的双极星云。Nakai利用VLBA对Seyfert星系IC 2560核区的H_（20）脉泽辐射进行了映射，结果表明，在核内0.1 pc的致密区，脉泽斑呈沿着直线分布，表明有一个气体盘围绕着核旋转。