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Recognition of M-type stars in the unclassified spectra of LAMOST DR5 using a hash-learning method

Recognition of M-type stars in the unclassified spectra of LAMOST DR5 using a hash-learning method

Our study aims to recognize M-type stars which are classified as "UNKNOWN" due to bad quality in Large sky Area Multi-Object fibre Spectroscopic Telescope (LAMOST) DR5 V1. A binary nonlinear hashing algorithm based on Multi-Layer Pseudo Inverse Learning (ML-PIL) is proposed to effectively learn spectral features for the M-type star …