Development of optical/near infrared camera and long-term monitoring of target sources for VERA

为VERA开发光学/近红外相机并对目标源进行长期监测

• 批准号: 13640242
• 负责人: HIROTA Tomoya
• 金额: $ 2.37万
• 依托单位: National Astronomical Observatory of Japan (2003)Kagoshima University (2001-2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640242/
• 关键词: Optical; NIR astronomy; Radio Astronomy; VLBI; Mira-type valuable stars; Period-Luminosity relation; Star-forming regions; Maser; Distance measurements

VERA is a newly constructed VLBI array promoted by National Astronomical Observatory of Japan in collaboration with Kagoshima University. VERA aims to measure the parallaxes of maser sources associated with star-forming regions and Mira valuables in the Galaxy. Because maser sources are highly valuable, it is important to monitor their intensities in order to carry out long-term VLBI observations more efficiently. For the purpose of this, we planned to develop a 1m optical/near infrared telescope to monitor the target sources for VERA. In addition, we planned to carry out survey and monitoring observations of maser sources observed with VERA with the 6m single-dish radio telescope and 20 m antenna of VERA.In our project, we confirmed that dual-beam phase calibration system of VERA is a powerful tool to use phase-referencing observations (Honma et al. 2003). Using this system, we have started to carry out long-term VLBI monitoring observations with VERA. Some of the results are presented in domestic and international conferences. In addition, we have started survey and monitoring observations of a few hundreds of maser sources using the 6m radio telescope and 20m antenna of VERA as a single-dish radio telescope. We are now constructing database of the maser sources and it will be published near future.On the other hand, we have developed a 1m optical/near infrared telescope and also started to carry out monitoring observations of Mira valuables. We found several unknown Mira valuables in our survey observations. In order to determine their period accurately, we are planning to continue further long-term monitoring observations.

VERA是日本国家天文台与鹿儿岛大学合作推广的新建VLBI阵列。 VERA 旨在测量与银河系中的恒星形成区域和 Mira 贵重物质相关的微波激射源的视差。由于脉泽源非常有价值，因此监测其强度以便更有效地进行长期 VLBI 观测非常重要。为此，我们计划开发一台1m光学/近红外望远镜来监测VERA的目标源。此外，我们计划利用VERA的6m单口径射电望远镜和20m天线对VERA观测的脉泽源进行调查和监测观测。在我们的项目中，我们确认了VERA的双波束相位校准系统是一种使用相位参考观测的强大工具（Honma et al. 2003）。利用该系统，我们开始利用VERA进行长期VLBI监测观测。部分成果在国内和国际会议上发表。此外，我们还开始使用VERA的6m射电望远镜和20m天线作为单口径射电望远镜对数百个脉泽源进行调查和监测观测。我们现在正在建设微波激射源数据库，将于近期发布。另一方面，我们已经研制了1m光学/近红外望远镜，也开始对米拉贵重物品进行监测观测。我们在调查观察中发现了一些未知的米拉贵重物品。为了准确确定其周期，我们计划继续进行进一步的长期监测观测。

项目成果

Honma, M. et al.: "first Fringe Detection with VERA's Dual-Beam System and Its Phase-Referencing Capability"Publications of the Astronomical Society of Japan. Vol.55,No.4. L57-L60 (2003)

Honma, M. 等人：“首次使用 VERA 双光束系统及其相位参考能力进行条纹检测”日本天文学会出版物。

Le Bertre, T. et al.: "Galactic mass-lossing AGB stars probed with the IRTS.I"Astronomy and Astrophysics. 376. 997-1010 (2001)

Le Bertre, T. 等人：“用 IRTS.I 探测银河系质量损失的 AGB 恒星”天文学和天体物理学。

Imai, H. et al.: "3-D Kinematics of Water Masers in the W 51A Region"Publications of the Astronomical Society of Japan. Vol54,No5. 741-755 (2002)

Imai, H. 等人：“W 51A 区域水脉泽的 3-D 运动学”日本天文学会出版物。

Tingay, S.J. et al.: "VSOP Space VLBI and Geodetic VLBI Investigations of Southern Hemisphere Radio Sources"The Astrophysical Journal Supplement Series. Vol 141,No2. 311-335 (2002)

廷盖，S.J.

Imai, H. et al.: "A collimated jet of molecular gas from a star on the asymptotic giant branch"Nature. Vol417. 829-831 (2002)

Imai, H. 等人：“来自渐近巨星分支上的恒星的分子气体准直射流”《自然》。