THE GALACTIC O-STAR SPECTROSCOPIC SURVEY (GOSSS). II. BRIGHT SOUTHERN STARS

By A. Sota, J. M. Apell'aniz, N. Morrell, R. Barbá, N. Walborn, R. Gamen, J. Arias, E. Alfaro. 2013

403 citations recorded by the source corpus.

We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R ∼ 2500 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 M☉ are 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.

Subfields: Astronomy and Astrophysics, Education, Instrumentation

View Paper: https://www.semanticscholar.org/paper/ad45bfd89994f07c09143a466c78369fdf0cafb9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. N. Langer
2. Sung-Chul Yoon
3. P. Podsiadlowski
4. Selma de Mink
5. A. D. Koter
6. H. Sana
7. M. Kruckow
8. T. Moriya

In Education

1. N. Langer
2. Sung-Chul Yoon
3. H. Zinnecker
4. K. Kratter
5. O. Schnurr

In Instrumentation

1. N. Langer
2. Sung-Chul Yoon
3. H. Sana
4. A. D. Koter
5. T. Moriya
6. M. Kruckow
7. P. Podsiadlowski
8. H. Zinnecker

Citations in the corpus

• SOUTHERN MASSIVE STARS AT HIGH ANGULAR RESOLUTION: OBSERVATIONAL CAMPAIGN AND COMPANION DETECTION (2014, methodology): “It is a 22.4 day period SB1 system according to OWN.”
• Formation of Double Neutron Star Systems (2017, background): “The majority of them are found in close binaries that will start mass transfer before the first SN occurs (Sana et al. 2012; Kiminki & Kobulnicky 2012; Sota et al. 2014).”