J-PLUS:Support vector machine applied to STAR-GALAXY-QSO classification

Wang, C. and Bai, Y. and López-Sanjuan, C. and Yuan, H. and Wang, S. and Liu, J. and Sobral, D. and Baqui, P.O. and Martín, E.L. and Andres Galarza, C. and Alcaniz, J. and Angulo, R.E. and Cenarro, A.J. and Cristóbal-Hornillos, D. and Dupke, R.A. and Ederoclite, A. and Hernández-Monteagudo, C. and Marín-Franch, A. and Moles, M. and Sodré, L. and Vázquez Ramió, H. and Varela, J. (2022) J-PLUS:Support vector machine applied to STAR-GALAXY-QSO classification. Astronomy and Astrophysics, 659. ISSN 1432-0746

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Context. In modern astronomy, machine learning has proved to be efficient and effective in mining big data from the newest telescopes. Aims. In this study, we construct a supervised machine-learning algorithm to classify the objects in the Javalambre Photometric Local Universe Survey first data release (J-PLUS DR1). Methods. The sample set is featured with 12-waveband photometry and labeled with spectrum-based catalogs, including Sloan Digital Sky Survey spectroscopic data, the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, and VERONCAT a the Veron Catalog of Quasars AGN. The performance of the classifier is presented with the applications of blind test validations based on RAdial Velocity Extension, the Kepler Input Catalog, the Two Micron All Sky Survey Redshift Survey, and the UV-bright Quasar Survey. A new algorithm was applied to constrain the potential extrapolation that could decrease the performance of the machine-learning classifier. Results. The accuracies of the classifier are 96.5% in the blind test and 97.0% in training cross-validation. The F1-scores for each class are presented to show the balance between the precision and the recall of the classifier. We also discuss different methods to constrain the potential extrapolation.

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Journal Article
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Astronomy and Astrophysics
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14 Apr 2022 15:05
Last Modified:
22 Nov 2022 11:20