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Publicly available database for spectral line measurements of SDSS DR7 galaxies

Published online by Cambridge University Press:  17 August 2012

Kyuseok Oh ,
Marc Sarzi ,
Kevin Schawinski  and
Sukyoung K. Yi
Kyuseok Oh
Affiliation:
Department of Astronomy, Yonsei University, Seoul 120-749, Korea email: [email protected]
Marc Sarzi
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, UK
Kevin Schawinski
Affiliation:
Yale Center for Astronomy and Astrophysics, Yale University, P.O. Box 208121, New Haven, CT 06511, U.S.A. Einstein Fellow
Sukyoung K. Yi
Affiliation:
Department of Astronomy, Yonsei University, Seoul 120-749, Korea email: [email protected]
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Abstract

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We present a new database of absorption and emission-line measurements based on the Sloan Digital Sky Survey (SDSS) 7th data release of galaxies within a redshift of 0.2. Using the publicly available penalized pixel-fitting (pPXF) and gas and absorption line fitting (gandalf) codes, our work improve the existing measurements for stellar kinematics, the strength of various absorption line features, and the flux and width of the emissions from different species of ionised gas. Most notable of our work is that, we provide quality of the fit to assess reliability of the measurements. The quality assessment can be highly effective for finding new classes of objects. For example, based on the quality assessment around the Ha and [NII] nebular lines, we found approximately 1% of the SDSS spectra which classified as galaxies by the SDSS pipeline are in fact type I Seyfert AGN. This paper presents a summary of the recent paper, Oh et al.(2011). The database is publicly available at http://gem.yonsei.ac.kr/ossy/.

Keywords

catalogsgalaxies:abundancesgalaxies:stellar contentgalaxies:statistics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 309 - 311
Copyright
Copyright © International Astronomical Union 2012

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