Alignment of the angular momentum vectors of planetary nebulae in the Galactic Bulge

@article{Rees2013AlignmentOT,
  title={Alignment of the angular momentum vectors of planetary nebulae in the Galactic Bulge},
  author={B. Rees and Albert A. Zijlstra},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={435},
  pages={975-991}
}
  • B. Rees, A. Zijlstra
  • Published 22 July 2013
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We use high-resolution Himages of 130 planetary nebulae (PNe) to investigate whether there is a preferred orientation for PNe within the Galactic Bulge. The orien- tations of the full sample have an uniform distribution. However, at a significance level of 0.01, there is evidence for a non-uniform distribution for those planetary nebulae with evident bipolar morphology. If we assume that the bipolar PNe have an unimodal distribution of the polar axis in Galactic coordinates, the mean Galactic… 
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DFG thanks the European Research Council (ADG-2011 ECOGAL), and Brazilian agencies CNPq (no. 300382/2008-1), CAPES (3400-13-1) and FAPESP (no.2011/12909-8) for financial support. HM thanks CNPq grant
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