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是由日本国家天文台与鹿儿岛大学合作开发的新型VLBI阵列。VERA旨在测量与银河系中恒星形成区域和米拉贵重物品相关的脉泽源的视差。由于脉泽源具有很高的价值，为了更有效地进行VLBI的长期观测，对其强度进行监测是非常重要的。为此，我们计划研制1米光学/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单碟射电望远镜和20m天线对VERA观测到的脉泽源进行调查和监测观测。在我们的项目中，我们证实了VERA的双光束相位校准系统是使用相位参考观测的强大工具（Honma et al. 2003）。利用该系统，我们已经开始使用VERA进行VLBI的长期监测观测。部分研究成果已在国内外会议上发表。此外，我们还利用VERA的6米射电望远镜和20米天线作为单碟射电望远镜，对数百个脉泽源进行了调查和监测观测。目前，我们正在建立脉泽源数据库，并将于近期发布。另一方面，我们研制了1米光学/近红外望远镜，并开始对Mira贵重物品进行监测观测。我们在调查观察中发现了几件不知名的米拉贵重物品。为了准确地确定它们的周期，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。

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。

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。

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》。