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Radio Star Candidates from FIRST and 2MASS Databases

Published online by Cambridge University Press:  01 April 2008

Yanxia Zhang  and
Yongheng Zhao
Yanxia Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]; [email protected]
Yongheng Zhao
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]; [email protected]
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Abstract

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We positionally cross-identified FIRST (the Faint Images of the Radio Sky at Twenty centimeters) catalogue with 2MASS (the Two Micron All Sky Survey) pointed-source database and collected the data from radio band and near infrared band. Then the data were cross-matched with the Véron-Cetty & Véron 2006 catalog and the Tycho-2 catalog, respectively. Therefore the known samples of quasars and stars are obtained. We applied principal component analysis (PCA) on the known sample. The overall sample may be projected in the principal component space. From the space, we can easily locate the area that radio stars occupy, and select out radio star candidates. With the follow-up observation of these candidates, the properties of radio stars may be studied.

Keywords

techniques: miscellaneousmethods: statisticalmethods: data analysisastronomical data bases: miscellaneous
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S252: The Art of Modeling Stars in the 21st Century , April 2008 , pp. 129 - 130
Copyright
Copyright © International Astronomical Union 2008

References

Zhang, Yanxia & Zhao, Yongheng 2003, PASP 115, 1006CrossRefGoogle Scholar