期刊
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷 193, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0067-0049/193/2/24
关键词
binaries: general; stars: early-type; stars: emission-line, Be; stars: Wolf-Rayet; surveys
资金
- Spanish Government Ministerio de Ciencia e Innovacion [AYA2007-64052]
- Ramon y Cajal Fellowship
- FEDER
- Junta de Andalucia [P08-TIC-4075]
- NASA, Space Telescope Science Institute [GO-10205, GO-10602, GO-10898, NAS 5-26555]
- Direccion de Investigacion de la Universidad de La Serena [DIULS PR09101]
- ESO-Government of Chile
We present the first installment of a massive spectroscopic survey of Galactic O stars, based on new, high signal-to-noise ratio, R similar to 2500 digital observations from both hemispheres selected from the Galactic O-Star Catalog of Mafz Apellaniz et al. and Sota et al. The spectral classification system is rediscussed and a new atlas is presented, which supersedes previous versions. Extensive sequences of exceptional objects are given, including types Ofc, ON/OC, Onfp, Of?p, Oe, and double-lined spectroscopic binaries. The remaining normal spectra bring this first sample to 184 stars, which is close to complete to B = 8 and north of delta = -20 degrees. and includes all of the northern objects in Maiz Apellaniz et al. that are still classified as O stars. The systematic and random accuracies of these classifications are substantially higher than previously attainable, because of the quality, quantity, and homogeneity of the data and analysis procedures. These results will enhance subsequent investigations in Galactic astronomy and stellar astrophysics. In the future, we will publish the rest of the survey, beginning with a second paper that will include most of the southern stars in Maiz Apellaniz et al.
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