Keck/HIRES Spectroscopy of V838 Monocerotis in October 2005

  title={Keck/HIRES Spectroscopy of V838 Monocerotis in October 2005},
  author={Tomasz Kami'nski and M. R. Schmidt and Romuald Tylenda and Maciej Konacki and Mariusz Gromadzki},
  journal={Astrophysical Journal Supplement Series},
V838 Monocerotis (V838 Mon) erupted at the beginning of 2002 becoming an extremely luminous star with L 106 L ☉. Among various scenarios proposed to explain the nature of the outburst, the most promising is a stellar merger event. In this paper, we investigate the observational properties of the star and its surroundings in the post outburst phase. We have obtained a high-resolution optical spectrum of V838 Mon in 2005 October using the Keck I telescope. We have identified numerous atomic… 
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