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arXiv · 1602.01336

The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems

J. Maíz Apellániz·A. Sota·J. I. Arias·R. H. Barbá·N. R. Walborn·S. Simón-Díaz·I. Negueruela·A. Marco·J. R. S. Leão·A. Herrero·R. C. Gamen·E. J. Alfaro
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Abstract

This is the third installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R~2500 digital observations selected from the Galactic O-Star Catalog (GOSC). In this paper we present 142 additional stellar systems with O stars from both hemispheres, bringing the total of O-type systems published within the project to 590. Among the new objects there are 20 new O stars. We also identify 11 new double-lined spectroscopic binaries (SB2s), of which 6 are of O+O type and 5 of O+B type, and an additional new tripled-lined spectroscopic binary (SB3) of O+O+B type. We also revise some of the previous GOSSS classifications, present some egregious examples of stars erroneously classified as O-type in the past, introduce the use of luminosity class IV at spectral types O4-O5.5, and adapt the classification scheme to the work of Arias et al. (2016).

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J. Maíz Apellániz, A. Sota, J. I. Arias, R. H. Barbá, N. R. Walborn, S. Simón-Díaz, I. Negueruela, A. Marco, J. R. S. Leão, A. Herrero, R. C. Gamen, E. J. Alfaro. 2016-02-08. The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems. https://doi.org/10.3847/0067-0049%2F224%2F1%2F4

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