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Ring Nebulae Abundances: Probes of the Evolutionary History of Luminous Blue Variable Stars*

  • Linda J. Smith (a1), Antonella Nota (a2), Anna Pasquali (a3), Claus Leitherer (a2), Mark Clampin (a2) and Paul A. Crowther (a1)...

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The ring nebulae that surround most Luminous Blue Variable (LBV) stars are believed to be the relics of one or more giant eruptions (cf. Nota, these proc.). The nebulae thus represent the stellar surface layers at the time of the eruption(s) and by analysing their chemical composition and dynamics, it is possible to infer the past evolutionary state of the star.

Observations with the Hubble Space Telescope (HST) and the Faint Object Spectrograph (FOS) were obtained for the nebulae around the two LMC LBVs R127 and R143, and the Ofpe/WN9 star S119 for the purpose of obtaining abundances. The spectra cover the wavelength range 3235–6818 Å and aslit of dimensions 1″.7 × 0″.2 was placed on the brightest portion of each nebula. Full details of these observations are given in Smith et al. (1998).

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*

Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA for NASA under contract NAS5-26555.

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References

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Barlow, M.J. 1991, in The Magellanic Clouds, IAU Symp. 148, ed. Haynes, R. & Milne, D. (Kluwer, Dordrecht), p. 291
Dufour, R.J., 1984, Structure and Evolution of the Magellanic Clouds, IAU Symp. 108, ed. van den Bergh, S. & de Boer, K.S. (Kluwer, Dordrecht), p. 353
Dufour, R.J., Glover, T.W., Hester, J.J., Currie, D.G., Van Orsow, D. & Walter, D.K., 1997, in Luminous Blue Variables: Massive Stars in Transition, ed. Nota, A. & Lamers, H.J.G.L.M. (ASP Conf. Ser.), 120, p. 255
Kingsburgh, R.L. & Barlow, M.J., 1994, MNRAS, 271, 257
Lennon, D.J., Wobig, D., Kudritzki, R.-P. & Stahl, O., 1994, Space Sci. Rev., 66, 207
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Panagia, N., Scuderi, S., Gilmozzi, R. & the SINS Collaboration, 1998, in ESO/CTIO/LCO Workshop SN 1987A: Ten Years After, eds. Phillips, M. and Suntzeff, N. A.S.P. Conf. Ser., in press.
Owocki, S.P. & Gayley, K.G., 1997, in Luminous Blue Variables: Massive Stars in Transition, ed. Nota, A. & Lamers, H.J.G.L.M. (ASP Conf. Ser.), 120, p.121
Russell, S.C. & Dopita, M.A., 1990, ApJS, 74, 93
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Stothers, R.B. & Chin, C.-w., 1996, ApJ, 468, 842
Venn, K.A., 1997, in Luminous Blue Variables: Massive Stars in Transition, ed. Nota, A. & Lamers, H.J.G.L.M. (ASP Conf. Ser.), 120, p. 95
Walton, N.A., Barlow, M.J., Monk, D.J. & Clegg, R.E.S., 1991, in The Magellanic Clouds, IAU Symp. 148, ed. Haynes, R. & Milne, D. (Kluwer, Dordrecht), p. 334

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