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Spectroscopic evolution of very massive stars at Z = 1/2.5 Zsun
F. Martins, A. Palacios
Stars with masses in excess of 100 Msun are observed in the Local Universe, but they remain rare objects. Because of the shape of the mass function, they are expected to be present…
Spectroscopic evolution of massive stars near the main sequence at low metallicity
F. Martins, A. Palacios
We present synthetic spectra and SEDs computed along evolutionary tracks at Z=1/5 Zsun and Z=1/30 Zsun, for masses between 15 and 150 Msun. We predict that the most massive stars a…
Extreme resonance line profile variations in the ultraviolet spectra of NGC 1624-2: probing the giant magnetosphere of the most strongly magnetized known O-type star
A. David-Uraz, C. Erba, V. Petit +12
In this paper, we present high-resolution HST/COS observations of the extreme magnetic O star NGC 1624-2. These represent the first ultraviolet spectra of this archetypal object. W…
Spectroscopic evolution of massive stars on the main sequence
F. Martins, A. Palacios
We provide an observational view of evolutionary models in the Hertzsprung--Russell diagram, on the main sequence. For that we computed evolutionary models with the code STAREVOL f…
Confirmation of the magnetic oblique rotator model for the Of?p star HD 191612
G. A. Wade, I. D. Howarth, R. H. D. Townsend +11
This paper reports high-precision Stokes V spectra of HD 191612 acquired using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope, in the context of the Magnetis…