Deep Learning application for stellar parameters determination: III- Denoising Procedure

Autor:	Gebran, Marwan, Bentley, Ian, Brienza, Rose, Paletou, Frédéric
Rok vydání:	2024
Předmět:	Astrophysics - Solar and Stellar Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics - Instrumentation and Methods for Astrophysics Physics - Computational Physics
Druh dokumentu:	Working Paper
Popis:	In this third paper in a series, we investigate the need of spectra denoising for the derivation of stellar parameters. We have used two distinct datasets for this work. The first one contains spectra in the range of 4450-5400 {\AA} at a resolution of 42000 and the second in the range of 8400-8800 {\AA} at a resolution of 11500. We constructed two denoising techniques, an autoencoder, and a Principal Component Analysis. Using random Gaussian noise added to synthetic spectra, we have trained a Neural Network to derive the stellar parameters Teff, log g, ve sin i, {\xi}t, and [M/H] of the denoised spectra. We find that, independently of the denoising technique, the stellar parameters accuracy values do not improve once we denoise the synthetic spectra. This is true with and without applying data augmentation to the stellar parameters Neural Network. Comment: 12 pages, 5 figures, accepted for publication in Open Astronomy
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2412.04631 Zobrazit plný text záznamu View this record from Arxiv