The low wind expansion velocity of metal‐poor carbon stars in the Halo and the Sagittarius stream★† (original) (raw)

This paper investigates the mass-loss mechanisms of metal-poor carbon stars during their asymptotic giant branch phase, particularly focusing on the low wind expansion velocities observed in these stars in the Galactic Halo and Sagittarius stream. It critiques existing theoretical models regarding dust-driven and pulsation-driven mass loss, emphasizing the metallicity's impact on these processes and presenting new observational data that suggests mass-loss rates in metal-poor stars are surprisingly similar to those in more metal-rich environments.