M矮星光譜型分類研究
發(fā)布時間:2018-08-29 08:19
【摘要】:M矮星的研究對于探索銀河系的結構、演化以及搜尋地外生命有重要意義。獲得M矮星的光譜型是一項重要的基礎工作。本研究采用SLOAN DR7的M矮星樣本,參考隨機森林的特征重要性度量,提取M矮星可見光波段600~900nm之間的特征。提取的特征與現(xiàn)有的光譜分類程序Hammer中采用的特征進行對比增加了三個新的特征,并重新計算了模板的特征指數(shù)。對該方法測試結果表明,增加了新指數(shù)的程序光譜型分類結果準確度有很大提高,該方法已用于對LAMOST的M矮星光譜進行光譜型分類。
[Abstract]:The study of M dwarfs is of great significance in exploring the structure, evolution and search for extraterrestrial life in the Milky way. It is an important work to obtain the spectral form of M dwarf star. In this study, the M-dwarf samples of SLOAN DR7 were used to extract the features between 600~900nm in the visible light band of M dwarfs with reference to the feature importance measure of random forests. The extracted features are compared with those used in the existing spectral classification program Hammer, and three new features are added, and the template feature index is recalculated. The experimental results show that the accuracy of the program spectral type classification with the new index is greatly improved, and this method has been applied to the spectral classification of LAMOST's M dwarf star spectrum.
【作者單位】: 山東大學(威海)機電與信息工程學院;中國科學院國家天文臺;中國科學院大學;
【基金】:國家自然科學基金項目(11078013,10973021)資助
【分類號】:P16
本文編號:2210723
[Abstract]:The study of M dwarfs is of great significance in exploring the structure, evolution and search for extraterrestrial life in the Milky way. It is an important work to obtain the spectral form of M dwarf star. In this study, the M-dwarf samples of SLOAN DR7 were used to extract the features between 600~900nm in the visible light band of M dwarfs with reference to the feature importance measure of random forests. The extracted features are compared with those used in the existing spectral classification program Hammer, and three new features are added, and the template feature index is recalculated. The experimental results show that the accuracy of the program spectral type classification with the new index is greatly improved, and this method has been applied to the spectral classification of LAMOST's M dwarf star spectrum.
【作者單位】: 山東大學(威海)機電與信息工程學院;中國科學院國家天文臺;中國科學院大學;
【基金】:國家自然科學基金項目(11078013,10973021)資助
【分類號】:P16
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