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arXiv e-print (1306.6417)
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Title: First whole-sky results from the Galactic O-Star Spectroscopic Survey
Authors: Maíz Apellániz, J.; Sota, A.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Alfaro, E. J.; Gamen, R. C.; Arias, J. I.; Gallego Calvente, A. T.
Affiliation: Maíz Apellániz, J.: Instituto de Astrofisica de Andalucia-CSIC
Sota, A.: Instituto de Astrofisica de Andalucia-CSIC
Morrell, N. I.: Las Campanas Observatory
Barbá, R. H.: Universidad de La Serena
Walborn, N. R.: Space Telescope Science Institute
Alfaro, E. J.: Instituto de Astrofisica de Andalucia-CSIC, 18008 Granada, Spain
Gamen, R. C.: Instituto de Astrofísica de La Plata
Arias, J. I.: Universidad de La Serena, La Serena, Chile
Gallego Calvente, A. T.: Instituto de Astrofisica de Andalucia-CSIC, 18008 Granada, Spain
Publication: Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece; Online at http://a2omega-conference.net, id.198
Date: 06/2013
Keywords: Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Galaxy Astrophysics
ADS: 2013msao.confE.198M  [Bibtex entry]

Abstract

The Galactic O-Star Spectroscopic Survey (GOSSS) is obtaining high quality R̃2500 blue-violet spectroscopy of all Galactic stars ever classified as of O type with B < 12 and a significant fraction of those with B = 12-14. As of March 2013, we have obtained, processed, and classified 2543 spectra of 1521 stars, including all of the sample with B < 8 and most of the sample with B = 8-10, making GOSSS already the largest collection of high quality O-star optical spectra ever assembled by a factor of 3. We will discuss the fraction of false positives in previous classifications and the implications of the observed spectral type-magnitude-color distribution for the spatial distribution of massive stars and dust within a few kpc of the Sun. We will also present some of the new serendipitous discoveries of peculiar objects allowed by the size and completeness of the sample. Finally, we will also present the new version of the Galactic O-Star Catalog (GOSC), which incorporates the new GOSSS data and that will be made available during the conference.


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