The Most Massive Stars in the Magellanic Clouds

Physics

Scientific paper

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Hst Proposal Id #6133 Hot Stars

Scientific paper

The analysis of high quality visual and uv (HST) spectrograms for a number of massive O-stars in the Magellanic Clouds has led to the conclusion that stellar masses for these objects may be as high as 200Msun . The radii and masses have been derived using apparent magnitudes determined from ground-based photometry and assuming that each object is single. Given the past history of supermassive stars (R136a for example) breaking up into multiple objects under the scrutiny of HST we propose obtaining high resolution images with WFPC2 for the most massive stars in our sample in order to verify that they are indeed single objects. If particular if singularity is confirmed for Sk-67 211 then we estimate that this object is the most massive star known.

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