Discovery of a new Wolf-Rayet star using SAGE-LMC

Details Discovery of a new Wolf-Rayet star using SAGE-LMC Discovery of a new Wolf-Rayet star using SAGE-LMC

2011-10-01

arxiv.org/abs/1110.0126v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To be published in the proceedings of the meeting 'Four decades of research on massive stars' in honor of Tony Moffat, 11-15 J

Scientific paper

We report the first-ever discovery of an extragalactic Wolf-Rayet (WR)star with Spitzer. A new WR star in the Large Magellanic Cloud (LMC) was revealed via detection of its circumstellar shell using 24 {\mu}m images obtained in the framework of the Spitzer Survey of the Large Magellanic Cloud (SAGE-LMC). Subsequent spectroscopic bservations with the Gemini South resolved the central star in two components, one of which is a WN3b+abs star, while the second one is a B0V star. We consider the lopsided brightness distribution over the circumstellar shell as an indication that the WR star is a runaway and use this interpretation to identify a possible parent cluster of the star.

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