Spectral Classification and Properties of the O Vz Stars in the Galactic O-Star Spectroscopic Survey (GOSSS)
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Título: | Spectral Classification and Properties of the O Vz Stars in the Galactic O-Star Spectroscopic Survey (GOSSS) |
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Autor/es: | Arias, Julia I. | Walborn, Nolan R. | Simón Díaz, Sergio | Barbá, Rodolfo H. | Maíz Apellániz, Jesús | Sabín-Sanjulián, Carolina | Gamen, Roberto C. | Morrell, Nidia I. | Sota, Alfredo | Marco, Amparo | Negueruela, Ignacio | Leão, João R.S. | Herrero, Artemio | Alfaro, Emilio J. |
Grupo/s de investigación o GITE: | Astrofísica Estelar (AE) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal |
Palabras clave: | Stars: early-type | Stars: fundamental parameters | Surveys |
Área/s de conocimiento: | Física Aplicada | Astronomía y Astrofísica |
Fecha de publicación: | 12-jul-2016 |
Editor: | IOP Publishing |
Cita bibliográfica: | The Astrophysical Journal. 2016, 152:31 (19pp). doi:10.3847/0004-6256/152/2/31 |
Resumen: | 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. |
Patrocinador/es: | J.I.A. and R.H.B. acknowledge financial support from the Chilean Government grants, through the FONDECYT Iniciación 11121550 and FONDECYT Regular 1140076 projects, respectively. S.S.-D. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) under grants AYA2010-21697-C05-04, and Severo Ochoa SEV-2011-0187, and by the Canary Islands Government under support from [a] the Spanish Government Ministerio de Economía y Competitividad (MINECO) through grants AYA2010-15 081, AYA2010-17 631, and AYA2013-40 611-P and [b] the Consejería de Educación of the Junta de Andalucía through grant P08-TIC-4075. C.S.-S. acknowledges support from the Joint Committee ESO-Government of Chile. I.N. and A.M. acknowledge support from the Spanish Ministerio de Ciencia e Innovación (MICINN) under grant AYA2012-39364-C02-02, and by the Generalitat Valenciana (ACOMP/2014/129). A.M. acknowledges support from the Generalitat Valenciana through the grant BEST/2015/242. |
URI: | http://hdl.handle.net/10045/59171 |
ISSN: | 0004-637X (Print) | 1538-4357 (Online) |
DOI: | 10.3847/0004-6256/152/2/31 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2016. The American Astronomical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.3847/0004-6256/152/2/31 |
Aparece en las colecciones: | INV - Astrofísica Estelar - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2016_Arias_etal_AJ.pdf | 8,73 MB | Adobe PDF | Abrir Vista previa | |
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