The Double-lined Spectrum of LBV 1806–20

  title={The Double-lined Spectrum of LBV 1806–20},
  author={Donald F. Figer and Francisco Najarro and Rolf Peter Kudritzki},
  journal={The Astrophysical Journal Letters},
  pages={L109 - L112}
Despite much theoretical and observational progress, there is no known firm upper limit to the masses of stars. Our understanding of the interplay between the immense radiation pressure produced by massive stars in formation and the opacity of infalling material is subject to theoretical uncertainties, and many observational claims of "the most massive star" have failed the singularity test. LBV 1806-20 is a particularly luminous object, L ∼ 106 L⊙, for which some have claimed very high mass… 

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