A New Insight to the Galactic O Vz Stars

Arias, J. I.; Simón-Díaz, S.; Barbá, R.; Maíz Apellániz, J.; Walborn, N. R.; Sota, A.; Morrell, N.; Gamen, R.; Alfaro, E.; Sabín-Sanjulián, C.; Herrero, A.
XIV Latin American Regional IAU Meeting (Eds. A. Mateus, J. Gregorio-Hetem & R. Cid Fernandes) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 44, pp. 36-36 (2014).


Based on a large sample of spectra from the Galactic O-Star Spectroscopic Survey (GOSSS, Maíz Apellániz et al. 2011) a systematic study of the Galactic O dwarfs belonging to the luminosity subclass Vz is being performed. Preliminary results suggest a redefinition of the quantitative criterion to assign the ``z'' qualifier to the spectra.