PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra
The general context of this study is the inversion of stellar fundamental parameters from high-resolution Echelle spectra. We aim at developing a fast and reliable tool for the post-processing of spectra produced, in particular, by the Espadons and Narval spectropolarimeters. Our inversion tool reli...
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ftdatacite:10.48550/arxiv.1401.1083 2023-05-15T18:50:45+02:00 PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra Paletou, F. Trouilhet, J. -F. Boehm, T. 2014 https://dx.doi.org/10.48550/arxiv.1401.1083 https://arxiv.org/abs/1401.1083 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Instrumentation and Methods for Astrophysics astro-ph.IM Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Preprint Article article CreativeWork 2014 ftdatacite https://doi.org/10.48550/arxiv.1401.1083 2022-04-01T13:12:47Z The general context of this study is the inversion of stellar fundamental parameters from high-resolution Echelle spectra. We aim at developing a fast and reliable tool for the post-processing of spectra produced, in particular, by the Espadons and Narval spectropolarimeters. Our inversion tool relies on principal component analysis. It allows reduction of dimensionality and the definition of a specific metric for the search of nearest neighbours between an observed spectrum and a set of synthetic spectra. Effective temperature, surface gravity, total metallicity and projected rotation velocity are derived. Our first tests, essentially done from the sole information coming from the spectral band that the RVS spectrometer will soon observe from the GAIA space observatory, and with spectra from mainly FGK-dwarfs are very promising. We also tested our method with a few targets beyond this domain of the H-R diagram. : 7 pages, 4 figures, 2 tables (technical report) Report narval narval DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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language |
unknown |
topic |
Instrumentation and Methods for Astrophysics astro-ph.IM Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
spellingShingle |
Instrumentation and Methods for Astrophysics astro-ph.IM Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Paletou, F. Trouilhet, J. -F. Boehm, T. PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
topic_facet |
Instrumentation and Methods for Astrophysics astro-ph.IM Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
description |
The general context of this study is the inversion of stellar fundamental parameters from high-resolution Echelle spectra. We aim at developing a fast and reliable tool for the post-processing of spectra produced, in particular, by the Espadons and Narval spectropolarimeters. Our inversion tool relies on principal component analysis. It allows reduction of dimensionality and the definition of a specific metric for the search of nearest neighbours between an observed spectrum and a set of synthetic spectra. Effective temperature, surface gravity, total metallicity and projected rotation velocity are derived. Our first tests, essentially done from the sole information coming from the spectral band that the RVS spectrometer will soon observe from the GAIA space observatory, and with spectra from mainly FGK-dwarfs are very promising. We also tested our method with a few targets beyond this domain of the H-R diagram. : 7 pages, 4 figures, 2 tables (technical report) |
format |
Report |
author |
Paletou, F. Trouilhet, J. -F. Boehm, T. |
author_facet |
Paletou, F. Trouilhet, J. -F. Boehm, T. |
author_sort |
Paletou, F. |
title |
PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
title_short |
PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
title_full |
PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
title_fullStr |
PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
title_full_unstemmed |
PCA-based inversion of stellar fundamental parameters from high-resolution Echelle spectra |
title_sort |
pca-based inversion of stellar fundamental parameters from high-resolution echelle spectra |
publisher |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1401.1083 https://arxiv.org/abs/1401.1083 |
genre |
narval narval |
genre_facet |
narval narval |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1401.1083 |
_version_ |
1766244509116530688 |