光谱学与光谱分析 |
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The Study of M Dwarf Spectral Classification |
YI Zhen-ping1, 2, 3, PAN Jing-chang1*, LUO A-li2 |
1. School of Mechanical, Electrical & Information Engineering, Shandong University at Weihai, Weihai 264209, China 2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 3. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract As the most common stars in the galaxy, M dwarfs can be used to trace the structure and evolution of the Milky Way. Besides, investigating M dwarfs is important for searching for habitability of extrasolar planets orbiting M dwarfs. Spectral classification of M dwarfs is a fundamental work. The authros used DR7 M dwarf sample of SLOAN to extract important features from the range of 600~900 nm by random forest method. Compared to the features used in Hammer Code, the authors added three new indices. Our test showed that the improved Hammer with new indices is more accurate. Our method has been applied to classify M dwarf spectra of LAMOST.
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Received: 2012-12-14
Accepted: 2013-03-25
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Corresponding Authors:
PAN Jing-chang
E-mail: pjc@sdu.edu.cn
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