The Galactic O-Star Spectral Survey (GOSSS) Project status and first results

TL;DR

The GOSSS project is systematically observing all known Galactic O stars with B<13 to improve spectral classification and understanding of these massive stars, presenting initial results from the first 400 objects.

Contribution

This paper reports the first results from the GOSSS project, including spectral data for the initial 400 Galactic O stars, expanding the catalog and refining spectral classifications.

Findings

Spectral classifications for the first 400 O stars are presented.

The survey has successfully observed all targeted objects within the initial sample.

Initial data quality and survey methodology are validated.

Abstract

The Galactic O-Star Spectroscopic Survey (GOSSS) is a project that is observing all known Galactic O stars with B < 13 (~2000 objects) in the blue-violet part of the spectrum with R~2500. It also includes two companion surveys (a spectroscopic one at R~1500 and a high resolution imaging one). It is based on v2.0 of the Galactic O star catalog (v1, Ma\'iz Apell\'aniz et al. 2004; v2, Sota et al. 2008). We have completed the first part of the main project. Here we present results on the first 400 objects of the sample.