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The Discovery of a Rare WO-type Wolf-Rayet Star in the Large Magellanic Cloud
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While observing OB stars within the most crowded regions of the Large Magellanic Cloud, we happened upon a new Wolf-Rayet star in Lucke-Hodge 41, the rich OB association that contains S Doradus and numerous other massive stars. At first glance the spectrum resembled that of a WC4 star, but closer examination showed strong OVI 3811, 34 lines, leading us to classify it as a WO4. This is only the second known WO in the LMC, and the first known WO4 (the other being a WO3). This rarity is to be expected due to these stars' short lifespans as they represent the most advanced evolutionary stage in a massive star's lifetime before exploding as SNe. This discovery shows that while the majority of WRs within the LMC have been discovered, there may be a few WRs left to be found.
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Cited by 1 Pith paper
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The Wolf-Rayet Content of the Galaxies of the Local Group and Beyond
A review of Wolf-Rayet star surveys showing that newly completed samples and updated models now broadly agree on how the WC/WN ratio varies with metallicity.
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