Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 389, Issue 3, Pages 1033-1040Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2008.13633.x
Keywords
stars : Wolf-Rayet; galaxies : individual : M33; Local Group
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
- Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT)
- FQRNT
- Royal Society
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We present optical spectra of 14 emission-line stars in M33's giant H II regions NGC 592, 595 and 604: five of them are known Wolf-Rayet (WR) stars, for which we present a better quality spectrogram, eight are WR candidates based on narrow-band imagery and one is a serendipitous discovery. Spectroscopy confirms the power of interference filter imagery to detect emission-line stars down to an equivalent width of about 5 angstrom in crowded fields. We have also used archival Hubble Space Telescope (HST)/WFPC2 (Wide Field and Planetary Camera 2) images to correctly identify emission-line stars in NGC 592 and 588.
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