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The GALAH survey: Characterization of emission-line stars with spectral modelling using autoencoders

Cotar, K.; Zwitter, T; Traven, Gregor; Bland-Hawthorn, Joss; Buder, Sven; Hayden, Michael; Kos, J.; Lewis, Geraint Francis; Martell, Sarah; Nordlander, Thomas; Stello, Dennis; Horner, Jonathan; Ting, Yuan-Sen; Zerjal, Marusa


We present a neural network autoencoder structure that is able to extract essential latent spectral features from observed spectra and then reconstruct a spectrum from those features. Because of the training with a set of unpeculiar spectra, the network is able to reproduce a spectrum of high signal-to-noise ratio that does not show any spectral peculiarities, even if they are present in an observed spectrum. Spectra generated in this manner were used to identify various emission features among...[Show more]

CollectionsANU Research Publications
Date published: 2021
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/staa2524
Access Rights: Open Access


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