New Evidence for Mass Loss from δ Cephei from H I 21 cm Line Observations

@article{Matthews2012NewEF,
  title={New Evidence for Mass Loss from $\delta$ Cephei from H I 21 cm Line Observations},
  author={Lynn D. Matthews and Massimo Marengo and Nancy Remage Evans and Giuseppe Bono},
  journal={The Astrophysical Journal},
  year={2012},
  volume={744},
  pages={53-64}
}
Recently published Spitzer Space Telescope observations of the classical Cepheid archetype {delta} Cephei revealed an extended dusty nebula surrounding this star and its hot companion HD 213307. At far-infrared wavelengths, the emission resembles a bow shock aligned with the direction of space motion of the star, indicating that {delta} Cephei is undergoing mass loss through a stellar wind. Here we report H I 21 cm line observations with the Very Large Array (VLA) to search for neutral atomic… 

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