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Where are the binaries in proto-planetary nebulae? Results of a long-term radial velocity study

  • Bruce J. Hrivnak (a1), Hans Van Winckel (a2), Griet Van de Steene (a3), David Bohlender (a4), Julius Sperauskas (a5) and Wenxian Lu (a1)...
Abstract

We present the results of a long-term search (25 yrs) for radial velocity variability in a sample of seven bright proto-planetary nebulae showing axial symmetry. They all vary in velocity due to periodic pulsations. However, only marginal evidence is found for multi-year variations that might be due to a binary companion.

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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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