The distances to Novae as seen by Gaia

  title={The distances to Novae as seen by Gaia},
  author={Bradley E. Schaefer},
  journal={Monthly Notices of the Royal Astronomical Society},
  • B. Schaefer
  • Published 1 September 2018
  • Physics
  • Monthly Notices of the Royal Astronomical Society
The Gaia spacecraft has just released a large set of parallaxes, including 41 novae for which the fractional error is <30%. I have used these to evaluate the accuracy and bias of the many prior methods for getting nova-distances. The best of the prior methods is the geometrical parallaxes from HST for just four novae, although the real error bars are 3X larger than stated. The canonical method for prior nova-distances has been the expansion parallaxes from the nova shells, but this method is… 
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