A critical evaluation of PCA detection of polarized signatures using real stellar data

The general context of this study concerns the post-processing of multiline spectropolarimetric observations of stars, and in particular these numerical analysis techniques aiming at the detection and the characterization of polarized signatures. Hereafter, using real observational data, we compare...

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Main Author: Paletou, Frederic
Format: Text
Language:unknown
Published: arXiv 2012
Subjects:
Instrumentation and Methods for Astrophysics astro-ph.IM
Solar and Stellar Astrophysics astro-ph.SR
FOS Physical sciences
narval
Online Access:https://dx.doi.org/10.48550/arxiv.1206.5139
https://arxiv.org/abs/1206.5139
id ftdatacite:10.48550/arxiv.1206.5139
record_format openpolar
spelling ftdatacite:10.48550/arxiv.1206.5139 2023-05-15T18:50:45+02:00 A critical evaluation of PCA detection of polarized signatures using real stellar data Paletou, Frederic 2012 https://dx.doi.org/10.48550/arxiv.1206.5139 https://arxiv.org/abs/1206.5139 unknown arXiv https://dx.doi.org/10.1051/0004-6361/201219399 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 article-journal Article ScholarlyArticle Text 2012 ftdatacite https://doi.org/10.48550/arxiv.1206.5139 https://doi.org/10.1051/0004-6361/201219399 2022-04-01T13:54:13Z The general context of this study concerns the post-processing of multiline spectropolarimetric observations of stars, and in particular these numerical analysis techniques aiming at the detection and the characterization of polarized signatures. Hereafter, using real observational data, we compare and clarify a number of points concerning various methods of analysis. Indeed, simple line addition, least-squares deconvolution and denoising by principal component analysis have been applied, and compared to each other, to polarized stellar spectra available from the TBLegacy database of the Narval spectropolarimeter. Such a comparison between various approaches of distinct sophistication levels allows us to make a safe choice for the next implementation of on-line post-processing of our unique database for the stellar physics community. : 5 pages, 6 figures (accepted A&A; see also http://tblegacy.bagn.obs-mip.fr/) Text narval narval DataCite Metadata Store (German National Library of Science and Technology)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
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, Frederic
A critical evaluation of PCA detection of polarized signatures using real stellar data
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 concerns the post-processing of multiline spectropolarimetric observations of stars, and in particular these numerical analysis techniques aiming at the detection and the characterization of polarized signatures. Hereafter, using real observational data, we compare and clarify a number of points concerning various methods of analysis. Indeed, simple line addition, least-squares deconvolution and denoising by principal component analysis have been applied, and compared to each other, to polarized stellar spectra available from the TBLegacy database of the Narval spectropolarimeter. Such a comparison between various approaches of distinct sophistication levels allows us to make a safe choice for the next implementation of on-line post-processing of our unique database for the stellar physics community. : 5 pages, 6 figures (accepted A&A; see also http://tblegacy.bagn.obs-mip.fr/)
format Text
author Paletou, Frederic
author_facet Paletou, Frederic
author_sort Paletou, Frederic
title A critical evaluation of PCA detection of polarized signatures using real stellar data
title_short A critical evaluation of PCA detection of polarized signatures using real stellar data
title_full A critical evaluation of PCA detection of polarized signatures using real stellar data
title_fullStr A critical evaluation of PCA detection of polarized signatures using real stellar data
title_full_unstemmed A critical evaluation of PCA detection of polarized signatures using real stellar data
title_sort critical evaluation of pca detection of polarized signatures using real stellar data
publisher arXiv
publishDate 2012
url https://dx.doi.org/10.48550/arxiv.1206.5139
https://arxiv.org/abs/1206.5139
genre narval
narval
genre_facet narval
narval
op_relation https://dx.doi.org/10.1051/0004-6361/201219399
op_rights arXiv.org perpetual, non-exclusive license
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
op_doi https://doi.org/10.48550/arxiv.1206.5139
https://doi.org/10.1051/0004-6361/201219399
_version_ 1766244502735945728

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