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Dimensionality Reduction of SDSS Spectra with Variational Autoencoders

  • Authors: Stephen K. N. Portillo, John K. Parejko, Jorge R. Vergara, and Andrew J. Connolly

2020 The Astronomical Journal 160 45.

  • Provider: AAS Journals

Caption: Figure 6.

Extreme emission-line galaxy (Plate-MJD-Fiber 391-51782-353): PCA and VAE reconstructions of the O II 3726/3729 (left) and Hα and S II emission lines (right). The median S/N of the spectrum is 9 in the left panel and 13 in the right panel. While the PCA reconstruction of the strong O II 3727 line gets better with more components, the VAE reconstruction does not improve after four parameters.

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