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

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Table 4

Wind model parameters for NIR observations.

Date (dd-mm-yy)	T_eff (K)	R_⋆ (R_⊙)	β	Ṁ [10⁻⁶] M_⊙ yr⁻¹	V_∞ (km s⁻¹)	V_mic (km s⁻¹)	V_macro [km s⁻¹]
26-10-13	20000	57	2	0.20	270	15	25
19-05-15	20000	57	2	0.70	270	15	30
07-06-15	20000	57	2	0.30	270	15	30
13-06-15	20000	57	2	0 30	270	15	30
19-06-15	20000	57	2	0.50	270	15	30
22-06-15	20000	57	2	0.35	270	15	30
28-06-15	20000	57	2	0.35	270	15	25
29-06-15	20000	57	2	0.35	270	15	25

Notes. A variation in Ṁ by a factor of ~2 is present within a three-week time interval. The mass-loss rates correspond to unclumped wind models.

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