The Distance to the Vela Supernova Remnant

  title={The Distance to the Vela Supernova Remnant},
  author={Alexandra N. Cha and Kenneth R. Sembach and Anthony C. Danks},
We have obtained high resolution Ca II and Na I absorption line spectra toward 68 OB stars in the direction of the Vela Supernova Remnant. The stars lie at distances of 190 – 2800 pc as determined by Hipparcos and spectroscopic parallax estimations. The presence of high velocity absorption attributable to the remnant along some of the sight lines constrains the remnant distance to 250±30 pc. This distance is consistent with several recent investigations that suggest that the canonical remnant… CONTINUE READING