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pro vyhledávání: '"Paletou, Frédéric"'
In this follow-up paper, we investigate the use of Convolutional Neural Network for deriving stellar parameters from observed spectra. Using hyperparameters determined previously, we have constructed a Neural Network architecture suitable for the der
Externí odkaz:
http://arxiv.org/abs/2210.17470
Machine Learning is an efficient method for analyzing and interpreting the increasing amount of astronomical data that is available. In this study, we show, a pedagogical approach that should benefit anyone willing to experiment with Deep Learning te
Externí odkaz:
http://arxiv.org/abs/2201.12476
Autor:
Paletou, Frédéric
This short review aims to clarify upon the origins of the so-called Eddington-Barbier relationships, which relate the emergent specific intensity and the flux to the photospheric source function at specific optical depths. Here we discuss about the a
Externí odkaz:
http://arxiv.org/abs/1711.07026
Publikováno v:
Open Astronomy, Vol 31, Iss 1, Pp 38-57 (2022)
Machine learning is an efficient method for analysing and interpreting the increasing amount of astronomical data that are available. In this study, we show a pedagogical approach that should benefit anyone willing to experiment with deep learning te
Externí odkaz:
https://doaj.org/article/eb32f4eb2caf4c2aa6f87706d6474d61
Autor:
Paletou, Frederic
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. Her
Externí odkaz:
http://arxiv.org/abs/1206.5139
Publikováno v:
Open Astronomy, Vol 28, Iss 1, Pp 68-84 (2019)
We present a method for deriving the stellar fundamental parameters. It is based on a regularized sliced inverse regression (RSIR).We first tested it on noisy synthetic spectra of A, F, G, and K-type stars, and inverted simultaneously their atmospher
Externí odkaz:
https://doaj.org/article/c8ea3fc35ba84dc5bc0a413bbb8f5842
Publikováno v:
Nature 438:466-469,2005
Models predict that magnetic fields play a crucial role in the physics of astrophysical accretion disks and their associated winds and jets. For example, the rotation of the disk twists around the rotation axis the initially vertical magnetic field,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511695
Autor:
Paletou Frédéric
Publikováno v:
Open Astronomy, Vol 27, Iss 1, Pp 76-79 (2018)
This short review aims to clarify upon the origins of so-called Eddington-Barbier relationships, which relate the emergent specific intensity and the flux to the photospheric source function at specific optical depths. Here we discuss the assumptions
Externí odkaz:
https://doaj.org/article/f2d47187a85c4ae6ac006e609924d6e1
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