The Interstellar Medium Interactions of a Runaway Luminous Blue Variable Nebula in the Large Magellanic Cloud

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Abstract
New observations of the Magellanic Cloud luminous blue variable candidate S119 (HD 269687) show the relationship of the star to its environs. Echelle spectroscopy and high-resolution Hubble Space Telescope imagery reveal an expanding bubble centered on the star. This bubble appears in both Hα and [N II] and is noticeably brighter on the near (blueshifted) side. The systemic velocity of both the expanding bubble and the star itself (as seen by the very broad Hα emission feature in the stellar spectrum) is Vhel ~ 160 km s-1, whereas the velocity of the superposed LMC interstellar medium (ISM) is 250-300 km s-1. ISM absorption features seen in Far-Ultraviolet Spectroscopic Explorer spectra reveal components at both stellar and LMC velocities. Thus, we conclude that S119 is located within the LMC ISM and that the bubble is interacting strongly with the ISM in a bow shock.
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