J/A+A/619/A22 Magnetic fields of HD9472 and HD190771 (Ramirez Velez+, 2018)
Using machine learning algorithms to measure stellar magnetic fields.
Ramirez Velez J.C., Yanez Marquez C., Cordova Barbosa J.P.
<Astron. Astrophys. 619, A22 (2018)>
=2018A&A...619A..22R 2018A&A...619A..22R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Polarization ; Line Profiles
Keywords: magnetic fields - line: profiles - polarization - radiative transfer -
methods: data analysis
Abstract:
We present the results of the measurement of stellar longitudinal
magnetic fields (Heff), using machine learning algoritmhs (MLA). We
applied the MLA approach in the analysis of two stars, namely,
HD 190771 and HD 9471. We present in electronic format the two data
sets, one per star, used in the training of the MLA.
Description:
The training data sets consists of multi-line circular polarized
profiles synthetized with the COSSAM code version 2017. Each
multi-line profile consists of 101 points in steps of 1km/s, from -50
to +50km/s. Each data set used for the training of MLA consist in 300
multi-line profiles normalized respect to the value of continuum.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 78 2 List of files
hd9472.fit 2880 86 Multi-line profiles for HD9472
(training data set)
hd9472.dat 7 300 Heff associated to the HD9472
multi-line profiles
hd190771.fit 2880 86 Multi-line profiles for HD190771
(training data set)
hd190771.dat 7 300 Heff associated to the HD190771
multi-line profiles
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 23 F4.1 arcsec DEs Declination (J2000)
25- 36 A12 --- FileName1 Name of the file with Heff
38- 49 A12 --- FileName2 Name of the fits file with multi-line
profiles
51- 78 A28 --- Title Title of the fits file
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Byte-by-byte Description of file: hd190771.dat hd9472.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 gauss g Longitudinal magnetic field for each
multi-line profile of the MZS_HD190771.fit
and MZS_HD9472.fit files
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Acknowledgements:
Julio Ramirez Velez, jramirez(at)astro.unam.mx
(End) Patricia Vannier [CDS] 20-Aug-2018