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    • A barium central star binary in the Type-I diamond ring planetary nebula Abell 70 

      Miszalski, B.; M. J. Boffin, H.; Frew, David J.; Acker, A.; Köppen, J.; F. J. Moffat, A.; A. Parker, Q. (2012-01)
      Abell 70 (PN G038.1-25.4, hereafter A 70) is a planetary nebula (PN) known for its diamond ring appearance due a superposition with a background galaxy. The previously unstudied central star is found to be a binary consisting ...