Variations in the intermediate wind region of the blue supergiant 55 Cygni

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Volume 677 (September 2023)

A&A, 677 (2023) A176

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Table 2

EW measurements (in Å) of absorption and emission lines taken in the K band.

HJD	Mg II λ2.137	Mg II λ2.143	He I λ2.149	He I λ2.161	He I λ2.162	He I λ2.164	Brγ_ab	Brγ_em	He I λ2.181	He I λ2.184
2457162	−0.09 ± 0.01	−0.04 ± 0.01	0.16 ± 0.02	0.51 ± 0.04	0.24 ± 0.04	0.44 ± 0.04	2.07 ± 0.07	−0.06 ± 0.05	0.10 ± 0.01	0.35 ± 0.03
2457181	−0.08 ± 0.01	–	0.20 ± 0.02	0.50 ± 0.02	0.12 ± 0.02	0.46 ± 0.04	2.51 ± 0.05	−0.15 ± 0.04	0.07 ± 0.01	0.30 ± 0.03
2457187	−0.11 ± 0.01	−0.05 ± 0.01	0.15 ± 0.02	0.52 ± 0.03	0.24 ± 0.03	0.59 ± 0.04	2.88 ± 0.06	−0.06 ± 0.02	0.11 ± 0.01	0.26 ± 0.03
2457193	−0.13 ± 0.01	−0.06 ± 0.01	0.16 ± 0.02	0.41 ± 0.04	0.26 ± 0.04	0.33 ± 0.05	2.28 ± 0.09	−0.11 ± 0.08	0.17 ± 0.01	0.26 ± 0.03
2457195	−0.12 ± 0.01	−0.06 ± 0.01	0.15 ± 0.02	0.51 ± 0.02	0.26 ± 0.02	0.38 ± 0.04	2.53 ± 0.06	−0.22 ± 0.05	0.11 ± 0.01	0.30 ± 0.03
2457198	–	−0.03 ± 0.01	0.13 ± 0.01	0.44 ± 0.05	0.18 ± 0.03	0.49 ± 0.05	2.56 ± 0.07	−0.24 ± 0.04	0.10 ± 0.01	0.20 ± 0.02
2457202	–	−0.04 ± 0.01	0.14 ± 0.01	0.47 ± 0.01	0.16 ± 0.01	0.43 ± 0.04	2.38 ± 0.06	−0.23 ± 0.07	0.07 ± 0.01	0.20 ± 0.02
2457203	−0.13 ± 0.01	−0.05 ± 0.01	0.15 ± 0.02	0.40 ± 0.02	0.19 ± 0.02	0.33 ± 0.03	1.97 ± 0.06	−0.30 ± 0.06	0.09 ± 0.01	0.23 ± 0.02

Notes. Negative values are for emission line components, and dashes indicate the absence of the line.

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