【摘要】：介紹了利用數(shù)字化施密特巡天底片數(shù)據(jù)求解銀盤外恒星絕對自行的基本原理和方法,描述了如何檢測并消除自行中各種系統(tǒng)差的工作.基于本文的方法,利用COMPASS底片數(shù)據(jù)庫中的部分底片數(shù)據(jù)進行了實驗,對于暗至RF=20.5星等的天體,歸算得到的絕對自行的零點精度達到了±0.2mas/yr的水平,整體精度好于±5.5mas/yr,基本消除了自行中與星等和顏色相關(guān)的系統(tǒng)差.本工作顯示了進一步改進現(xiàn)有施密特巡天星表自行的可行性,為如何消除GAIA星表自行的顏色和星等差提供了一種解決思路.本文還給出了一種利用星系與恒星間整體運動特性差異來挑選星系的新手段.
[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 鹵0.2mas/yr. The overall accuracy is better than 鹵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.
【作者單位】： 中國科學(xué)院上海天文臺;
【基金】：國家自然科學(xué)基金資助項目(批準號:10903022,11173027)
【分類號】：P152
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本文編號：2474814