Discovery of a new Wolf-Rayet star using SAGE-LMC
V.V. Gvaramadze (1), A.-N. Chen\'e (2,3), A.Y. Kniazev (4,1), O., Schnurr (5) ((1) Sternberg Astronomical Institute, Moscow State University,, Russia, (2) Departamento de Astronomia, Univ. de Concepcion, Chile, (3) Univ., de Valparaiso, Departamento de Fisica y Astronomia, Chile
TL;DR
This paper reports the first discovery of an extragalactic Wolf-Rayet star in the Large Magellanic Cloud using Spitzer infrared imaging, revealing its circumstellar shell and stellar components through spectroscopy.
Contribution
It presents the first identification of an extragalactic Wolf-Rayet star via infrared imaging and spectroscopic analysis, highlighting its circumstellar shell and potential runaway status.
Findings
Discovery of a new Wolf-Rayet star in the LMC
Resolved stellar components with spectroscopy
Indication of the star being a runaway
Abstract
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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Taxonomy
TopicsStellar, planetary, and galactic studies · Veterinary Equine Medical Research · Astronomical Observations and Instrumentation