The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars

We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R2500 digital observations from both hemispheres selected from the Galactic O-Star Catalog (GOSC). In this paper we include bright stars and other obj...

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Detalles Bibliográficos
Autores principales: Sota, Alfredo, Maíz Apellániz, Jesús, Morrell, Nidia Irene, Barbá, Rodolfo Héctor, Walborn, Nolan Revere, Gamen, Roberto Claudio, Arias, Julia Inés, Alfaro, Emilio J.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Astronómicas
binaries: general
binaries: spectroscopic
stars: early-type
stars: emission-line, Be
surveys
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85564
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85564
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
binaries: general
binaries: spectroscopic
stars: early-type
stars: emission-line, Be
surveys
spellingShingle Ciencias Astronómicas
binaries: general
binaries: spectroscopic
stars: early-type
stars: emission-line, Be
surveys
Sota, Alfredo
Maíz Apellániz, Jesús
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Gamen, Roberto Claudio
Arias, Julia Inés
Alfaro, Emilio J.
The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
topic_facet Ciencias Astronómicas
binaries: general
binaries: spectroscopic
stars: early-type
stars: emission-line, Be
surveys
description We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R2500 digital observations from both hemispheres selected from the Galactic O-Star Catalog (GOSC). In this paper we include bright stars and other objects drawn mostly from the first version of GOSC, all of them south of δ = -20°, for a total number of 258 O stars. We also revise the northern sample of Paper I to provide the full list of spectroscopically classified Galactic O stars complete to B = 8, bringing the total number of published GOSSS stars to 448. Extensive sequences of exceptional objects are given, including the early Of/WN, O Iafpe, Ofc, ON/OC, Onfp, Of?p, and Oe types, as well as double/triple-lined spectroscopic binaries. The new spectral subtype O9.2 is also discussed. The magnitude and spatial distributions of the observed sample are analyzed. We also present new results from OWN, a multi-epoch high-resolution spectroscopic survey coordinated with GOSSS that is assembling the largest sample of Galactic spectroscopic massive binaries ever attained. The OWN data combined with additional information on spectroscopic and visual binaries from the literature indicate that only a very small fraction (if any) of the stars with masses above 15-20 Mare born as single systems. In the future we will publish the rest of the GOSSS survey, which is expected to include over 1000 Galactic O stars.
format Articulo
Articulo
author Sota, Alfredo
Maíz Apellániz, Jesús
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Gamen, Roberto Claudio
Arias, Julia Inés
Alfaro, Emilio J.
author_facet Sota, Alfredo
Maíz Apellániz, Jesús
Morrell, Nidia Irene
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Gamen, Roberto Claudio
Arias, Julia Inés
Alfaro, Emilio J.
author_sort Sota, Alfredo
title The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
title_short The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
title_full The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
title_fullStr The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
title_full_unstemmed The Galactic O-Star Spectroscopic Survey (GOSSS) : II. Bright southern stars
title_sort galactic o-star spectroscopic survey (gosss) : ii. bright southern stars
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85564
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