高精度绝对自行的归算方法研究
发布时间：2019-05-11 20:13
【摘要】：介绍了利用数字化施密特巡天底片数据求解银盘外恒星绝对自行的基本原理和方法,描述了如何检测并消除自行中各种系统差的工作.基于本文的方法,利用COMPASS底片数据库中的部分底片数据进行了实验,对于暗至RF=20.5星等的天体,归算得到的绝对自行的零点精度达到了±0.2mas/yr的水平,整体精度好于±5.5mas/yr,基本消除了自行中与星等和颜色相关的系统差.本工作显示了进一步改进现有施密特巡天星表自行的可行性,为如何消除GAIA星表自行的颜色和星等差提供了一种解决思路.本文还给出了一种利用星系与恒星间整体运动特性差异来挑选星系的新手段.
[Abstract]:This paper introduces the basic principle and method of solving the absolute self of stars outside the silver disk by using the digital Schmitt survey film data, and describes how to detect and eliminate all kinds of system differences in the self. Based on the method in this paper, some negative data in COMPASS negative database are used to experiment. For the objects as dark as RF=20.5 magnitude, the zero-point precision of absolute self is up to 卤0.2mas/yr. The overall accuracy is better than 卤5.5 masy, which basically eliminates the system difference related to magnitude and color. This work shows the feasibility of further improving the existing Schmitt survey star table, and provides a solution to how to eliminate the color and magnitude difference of GAIA star table. In this paper, a new method is also presented to select the galaxy by using the difference of the global motion characteristics between the galaxy and the star.
【作者单位】： 中国科学院上海天文台;
【基金】：国家自然科学基金资助项目(批准号:10903022,11173027)
【分类号】：P152
，
本文编号：2474814
[Abstract]:This paper introduces the basic principle and method of solving the absolute self of stars outside the silver disk by using the digital Schmitt survey film data, and describes how to detect and eliminate all kinds of system differences in the self. Based on the method in this paper, some negative data in COMPASS negative database are used to experiment. For the objects as dark as RF=20.5 magnitude, the zero-point precision of absolute self is up to 卤0.2mas/yr. The overall accuracy is better than 卤5.5 masy, which basically eliminates the system difference related to magnitude and color. This work shows the feasibility of further improving the existing Schmitt survey star table, and provides a solution to how to eliminate the color and magnitude difference of GAIA star table. In this paper, a new method is also presented to select the galaxy by using the difference of the global motion characteristics between the galaxy and the star.
【作者单位】： 中国科学院上海天文台;
【基金】：国家自然科学基金资助项目(批准号:10903022,11173027)
【分类号】：P152
，
本文编号：2474814
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