publication . Preprint . 2006

VY Canis Majoris: The Astrophysical Basis of Its Luminosity

Humphreys, Roberta M.;
Open Access English
  • Published: 13 Oct 2006
The luminosity of the famous red supergiant VY CMa (L ~ 4 - 5 x 10e5 Lsun) is well-determined from its spectral energy distribution and distance, and places it near the empirical upper luminosity limit for cool hypergiants. In contrast, its surface temperature is fundamentally ill-defined. Both contradict a recent paper by Massey, Levesque and Plez (2006). Implications for its location on the HR Diagram and its apparent size are discussed.
arXiv: Astrophysics::Solar and Stellar AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Astrophysics
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