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.

Nakamura对标准恒星进行了光度观测，以成功获得了航天器Muses-C.DATA上的多波段摄像机的机上校准，以成功地获得了几个标准恒星。 Baba在墨西哥的San Pedro Martir天文台进行了斑点光谱观测。观察到BE和其他有趣的二元恒星。 Shibata使用vla.s.sato从6兆玛源的核中观察了HI吸收，并使用VLBA使用VLBA进行了一个监测NGC3079的监测程序，以研究Megamaser源核区域的结构。塔穆拉（Tamura）在Mauna Kea顶部的JCMT上对T Tauri恒星进行了亚毫升极化测量。首次从几个T陶里恒星中阳性检测到了巨笔的极化，从而提供了磁场中的磁场信息。 F.Sato在NRAO的4300万望远镜中，在附近的恒星形成区域的大区域获得了20000多个HI光谱。 Ohishi使用最进口量来寻找大型循环分子朝热分子云芯上搜索，并发现Furan可能的信号。 Sakamoto观察到弧度分辨率的五个内龙螺旋星系的核中的分子气体，以<100 pc的分辨率揭示气体分布和运动学。检测到各种特征，包括棒，核气盘，核气盘，中央气孔产生的双峰峰，可能是由核星爆。 Ogura的Byurakan天体物理天文台的Herbig-Haro（HH）候选者进行了窄带成像观测。在TMC和NGC 2264中分别发现了一个显着的HH对象和一个奇特的双极烯烃。 Nakai使用VLBA在Seyfert Galaxy IC2560的核区域中绘制的H20 Maser发射。结果表明，Maser斑点沿着核中0.1 PC的紧凑区域的一条线分布，表明围绕核旋转的气盘旋转。