New self-consistent wind parameters to fit optical spectra of O-type stars observed with the HERMES spectrograph

Aims. We performed a spectral fitting for set of O-type stars based on self-consistent wind solutions, which provide mass-loss rate and velocity profiles directly derived from the initial stellar parameters. The great advantage this is therefore reduction number free parameters to be tuned. Methods. Self-consistent values line-force ( k , α δ ) sc subsequently rate, M terminal velocity, υ ∞‚sc are provided by m-CAK prescription introduced in Paper I, updated work with improvements such as temperature structure T r that self-consistently evaluated line-acceleration. Synthetic spectra were calculated using radiative transfer code FASTWIND, replacing classical β -law our new v making clumping only parameter wind. Results. found solutions theoretical rates order most recent predictions other studies. From here, we generate synthetic hydrodynamics fit obtain sample (HD 192639, 9 Sge, HD 57682, 218915, 195592, 210809), whose taken high-resolution echelle spectrograph H ERMES R = 85 000). find satisfactory global observations, good accuracy photospheric He I II lines quite acceptable lines. Although analysis currently constrained optical wavelength range alone, an important step towards determination without -law. Based variance parameters, establish method valid eff ≥ 30 kK log g 3.2. Given these results, expect here helpful future studies constituting sample, together prospect may extended numerous massive future.