【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(pán)外恒星絕對(duì)自行的基本原理和方法,描述了如何檢測(cè)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(kù)中的部分底片數(shù)據(jù)進(jìn)行了實(shí)驗(yàn),對(duì)于暗至RF=20.5星等的天體,歸算得到的絕對(duì)自行的零點(diǎn)精度達(dá)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(jìn)一步改進(jìn)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(yùn)動(dòng)特性差異來(lái)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(guó)科學(xué)院上海天文臺(tái);
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(批準(zhǔn)號(hào):10903022,11173027)
【分類號(hào)】：P152
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本文編號(hào)：2474814