Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)

On the basis of the Galactic O Star Spectroscopic Survey (GOSSS), we present a detailed systematic investigation of the O Vz stars. The currently used spectral classification criteria are rediscussed, and the Vz phenomenon is recalibrated through the addition of a quantitative criterion based on the...

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Autores principales:	Arias, Julia Inés, Walborn, Nolan Revere, Díaz, S. S., Barbá, Rodolfo Héctor, Maíz Apellániz, Jesús, Sabín Sanjulián, C., Gamen, Roberto Claudio, Morrell, Nidia Irene, Sota, Alfredo, Marco, A., Negueruela, I., Leão, J. R. S., Herrero, A., Alfaro, Emilio J.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2016
Materias:	Ciencias Astronómicas stars: early-type stars: fundamental parameters surveys
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/86512
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-86512
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas stars: early-type stars: fundamental parameters surveys
spellingShingle	Ciencias Astronómicas stars: early-type stars: fundamental parameters surveys Arias, Julia Inés Walborn, Nolan Revere Díaz, S. S. Barbá, Rodolfo Héctor Maíz Apellániz, Jesús Sabín Sanjulián, C. Gamen, Roberto Claudio Morrell, Nidia Irene Sota, Alfredo Marco, A. Negueruela, I. Leão, J. R. S. Herrero, A. Alfaro, Emilio J. Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
topic_facet	Ciencias Astronómicas stars: early-type stars: fundamental parameters surveys
description	On the basis of the Galactic O Star Spectroscopic Survey (GOSSS), we present a detailed systematic investigation of the O Vz stars. The currently used spectral classification criteria are rediscussed, and the Vz phenomenon is recalibrated through the addition of a quantitative criterion based on the equivalent widths of the He i λ4471, He ii λ4542, and He ii λ4686 spectral lines. The GOSSS O Vz and O V populations resulting from the newly adopted spectral classification criteria are comparatively analyzed. The locations of the O Vz stars are probed, showing a concentration of the most extreme cases toward the youngest star-forming regions. The occurrence of the Vz spectral peculiarity in a solar-metallicity environment, as predicted by the fastwind code, is also investigated, confirming the importance of taking into account several processes for the correct interpretation of the phenomenon.
format	Articulo Articulo
author	Arias, Julia Inés Walborn, Nolan Revere Díaz, S. S. Barbá, Rodolfo Héctor Maíz Apellániz, Jesús Sabín Sanjulián, C. Gamen, Roberto Claudio Morrell, Nidia Irene Sota, Alfredo Marco, A. Negueruela, I. Leão, J. R. S. Herrero, A. Alfaro, Emilio J.
author_facet	Arias, Julia Inés Walborn, Nolan Revere Díaz, S. S. Barbá, Rodolfo Héctor Maíz Apellániz, Jesús Sabín Sanjulián, C. Gamen, Roberto Claudio Morrell, Nidia Irene Sota, Alfredo Marco, A. Negueruela, I. Leão, J. R. S. Herrero, A. Alfaro, Emilio J.
author_sort	Arias, Julia Inés
title	Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
title_short	Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
title_full	Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
title_fullStr	Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
title_full_unstemmed	Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
title_sort	spectral classification and properties of the o vz stars in the galactic o-star spectroscopic survey (gosss)
publishDate	2016
url	http://sedici.unlp.edu.ar/handle/10915/86512
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Spectral classification and properties of the O VZ stars in the Galactic O-Star Spectroscopic Survey (GOSSS)

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