An occultation event in a triple post-AGB star

M. Hajduk; A. A. Zijlstra; K. Gesicki

doi:10.1051/0004-6361:200810492

An occultation event in a triple post-AGB star

Astrophysics 2008-11-04 v2

Authors: M. Hajduk , A. A. Zijlstra , K. Gesicki

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Abstract

We study the post-AGB central star of the (bipolar) Galactic bulge planetary nebula M 2-29. We have obtained additional HST imaging and SAAO spectroscopy of the object. The star showed a pronounced, long-lasting occultation with subsequent recovery. The event lasted for almost 3 years, with a secondary minimum 9 years later. The photometric behaviour of M 2-29 resembles the dust-occultation events seen in NGC 2346, and is modeled as an occultation by a circumbinary disk, where the binary period is 18 yr. Modulation during the decline shows evidence for another companion with a period of 23 days.

Cite

@article{arxiv.0807.0028,
  title  = {An occultation event in a triple post-AGB star},
  author = {M. Hajduk and A. A. Zijlstra and K. Gesicki},
  journal= {arXiv preprint arXiv:0807.0028},
  year   = {2008}
}

Comments

4 pages, 5 figures

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