The ISM Interactions of a Runaway LBV Nebula in the LMC

Details The ISM Interactions of a Runaway LBV Nebula in the LMC The ISM Interactions of a Runaway LBV Nebula in the LMC

2001-03-27

arxiv.org/abs/astro-ph/0103453v1

Astrophys.J. 552 (2001) L155-L158

Astronomy and Astrophysics

Astrophysics

5 pages in EmulateApJ format, 3 figures Accepted by ApJL See http://fuse.pha.jhu.edu/~danforth/s119/

Scientific paper

10.1086/320341

New observations of the Magellanic Cloud Luminous Blue Variable candidate S119 (HD269687) show the relationship of the star to its environs. Echelle spectroscopy and high-resolution HST imagery reveal an expanding bubble centered on the star. This bubble appears in both Halpha and [NII] and is noticeably brighter on the near (blue-shifted) side. The systemic velocity of both the expanding bubble and the star itself (as seen by the very broad Halpha emission feature in the stellar spectrum) is V_hel=160 km/s whereas the velocity of the superposed LMC ISM is 250-300 km/s. ISM absorption features seen in FUSE 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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