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Filling Gaps in Indo-US Stellar Spectral Library using Principal Component Analysis

Published online by Cambridge University Press:  01 December 2006

Harinder P. Singh ,
S. Jotin Singh ,
Ranjan Gupta  and
M. Yuasa
Harinder P. Singh
Affiliation:
Department of Physics & Astrophysics, University of Delhi, Delhi – 110 007, India
S. Jotin Singh
Affiliation:
Department of Physics & Astrophysics, University of Delhi, Delhi – 110 007, India
Ranjan Gupta
Affiliation:
IUCAA, Post Bag 4, Ganeshkhind, Pune 411 007, India
M. Yuasa
Affiliation:
Research Institute of Science & Technology, Kinki University, Osaka, Japan
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Abstract

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The Indo-US coudé feed stellar spectral library (CFLIB) published recently by Valdes et al. (2004) contains spectra of 1273 stars in the spectral region 3460 to 9464 Å at a resolution of 1 Å. About 500 stars in this database have gaps ranging from a few Å to several tens of Å in this wavelength range. We use a variation of Principal Component Analysis (PCA) technique to fill gaps of up to 5Å in a subset of spectra from the CFLIB. We hope to exploit the full potential of the scheme and attempt to fill larger gaps in stellar spectra in a subsequent study.

Keywords

Stars: CatalogsPrincipal Component AnalysisMethods: Data Analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 101 - 102
Copyright
Copyright © International Astronomical Union 2007

References

Singh, H.P., Yuasa, M., Yamamoto, N. & Gupta, R. 2006, PASJ 58, 177CrossRefGoogle Scholar
Unno, W. & Yuasa, M. 1992, Ap&SS 189, 271Google Scholar
Valdes, F., Gupta, R., Rose, J. A., Singh, H. P. & Bell, D. J. 2004,ApJS 152, 251 (CFLIB)Google Scholar