权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Resolution of structure and formation of galaxies by using highly precise astrometric observations

通过使用高精度天体测量观测来解析星系的结构和形成

基本信息

批准号：
13640249
负责人：
GOUDA naoteru
金额：
$ 1.15万
依托单位：
National Astronomical Observatory
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 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640249/
关键词：
the Galaxy astrometry astrometry satellite galaxy formation dynamical structure of galaxy self-gravitating system evolution of QSO

项目摘要

We examined the following theoretical analyses in connection with the dynamical structure of the Galaxy, keeping an eye on the highly precise astrometric observations coming out in the future. Furthermore the infrared astrometry satellite plan itself was performed.1. The origin of the Spiral arms : although the density wave theory is a good candidate which can explain the origin of spiral arms , it is not sure whether it is true or not. We developed a method which can determine whether the density wave is the origin or not by using the information on kinematics of stars which will be taken by high precise astrometric observations. Furthermore we found that a pitch angle might be decided by balance of the influence by bar potential, and pattern of a spiral arm.2. Since some biases arise when the error of a parallax is large in changing a parallax to a distance, cautions are required. Then we developed a new method which cannot produce biases.3. Construction of the model of dynamical structure : the method to construct theoretical models of the dynamical structure of the Galaxy was investigated.4. We analyzed formation and evolution of galaxies in the early stages of the universe, and moreover QSO which might be closely connected with evolutions of galaxies using the semi- analytical method.5. The infrared astrometry satellite plan was examined. The primitive specification was summarized.

我们研究了以下与银河系动力学结构有关的理论分析，并密切关注未来即将出现的高精度天体测量观测。此外，还完成了红外天体测量卫星方案.螺旋臂的起源：虽然密度波理论是一个很好的候选者，可以解释螺旋臂的起源，但它并不确定它是否正确。我们发展了一种利用高精度天体测量所获得的恒星运动学信息来确定密度波是否为起源的方法。此外，我们还发现螺旋角的大小可能取决于杆势影响的平衡和螺旋臂的形状.由于在将视差改变为距离时，当视差的误差较大时会出现一些偏差，因此需要注意。然后我们开发了一种新的方法，它不会产生偏差.动力学结构模型的建立：研究了银河系动力学结构理论模型的建立方法.用半解析方法分析了宇宙早期星系的形成和演化，以及可能与星系演化密切相关的类星体.审查了红外天体测量卫星计划。总结了原始规范。