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The ORFEUS Far Ultraviolet Spectrum of the LMC Binary Star HDE 269546

  • H. Widmann (a1), G. Krämer (a1), I. Appenzeller (a2), J. Barnstedt (a1), A. Fromm (a1), M. Gölz (a1), M. Grewing (a3), W. Gringel (a1), C. Haas (a1), W. Hopfensitz (a1), N. Kappelmann (a1), J. Krautter (a2), A. Lindenberger (a1) and H. Mandel (a2)...

Abstract

Far UV high resolution spectra of 3 LMC and SMC stars were obtained with the Echelle spectrograph during the second ORFEUS mission in Dec. 1996. We present the first results from observations of the LMC star HDE 269546. We find definitely components of very hot gas identified as OVI and SVI absorption in the galactic halo of the Milky Way and in the LMC. Additionally, more than 30 ions of the most abundant elements in different stages of ionization can be identified in both our galaxy and the LMC. For the first time we can identify a significant absorption component of molecular hydrogen in the ORFEUS II Echelle spectrum with a redshift of 200 km s−1, doubtlessly to be attributed to the LMC.

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References

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