Learning vector quantization for classifying astronomical objects

被引：12

作者：

Zhang, YX ^{[1
]}

Zhao, YH ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

来源：

CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS | 2003年 / 3卷 / 02期

关键词：

method : data analysis; method : statistical; catalogs;

D O I：

10.1088/1009-9271/3/2/183

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The sizes of astronomical surveys in different wavebands are increasing rapidly. Therefore, automatic classification of objects is becoming ever more important. We explore the performance of learning vector quantization (LVQ) in classifying multi-wavelength data. Our analysis concentrates on separating active sources from non-active ones. Different classes of X-ray emitters populate distinct regions of a multidimensional parameter space. In order to explore the distribution of various objects in a multidimensional parameter space, we positionally cross-correlate the data of quasars, BL Lacs, active galaxies, stars and normal galaxies in the optical, X-ray and infrared bands. We then apply LVQ to classify them with the obtained data. Our results show that LVQ is an effective method for separating AGNs from stars and normal galaxies with multi-wavelength data.

引用

页码：183 / 190

页数：8

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