A 2dF survey of the Small Magellanic Cloud

ABSTRACT We present a catalogue of new spectral types for hot, luminous stars in the Small Magellanic Cloud (SMC). The catalogue contains 4161 objects, giving an order‐of‐magnitude increase in the number of SMC stars with published spectroscopic classifications. The targets are primarily B‐ and A‐ty...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2004-09, Vol.353 (2), p.601-623
Main Authors: Evans, Christopher J., Howarth, Ian D., Irwin, Michael J., Burnley, Adam W., Harries, Timothy J.
Format: Article
Language:English
Subjects:
Hertzsprung-Russell (HR) diagram
Magellanic Clouds
stars: early-type
stars: emission-line
stars: emission‐line, Be
stars: fundamental parameters
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Summary:ABSTRACT We present a catalogue of new spectral types for hot, luminous stars in the Small Magellanic Cloud (SMC). The catalogue contains 4161 objects, giving an order‐of‐magnitude increase in the number of SMC stars with published spectroscopic classifications. The targets are primarily B‐ and A‐type stars (2862 and 853 objects respectively), with one Wolf–Rayet, 139 O‐type and 306 FG stars, sampling the main sequence to ∼mid‐B. The selection and classification criteria are described, and objects of particular interest are discussed, including UV‐selected targets from the Ultraviolet Imaging Telescope (UIT) experiment, Be and B[e] stars, ‘anomalous A supergiants’ and composite‐spectrum systems. We examine the incidence of Balmer‐line emission, and the relationship between Hγ equivalent width and absolute magnitude for BA stars.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2004.08096.x