Near-infrared Observations of the Proto-Planetary Nebula IRAS~07131-0147

Details Near-infrared Observations of the Proto-Planetary Nebula IRAS~07131-0147 Near-infrared Observations of the Proto-Planetary Nebula IRAS~07131-0147

1996-04-16

arxiv.org/abs/astro-ph/9604082v1

Astronomy and Astrophysics

Astrophysics

16 pages, compressed uuencoded file includes 6 postscript figures, also available via anonymous ftp at ftp://igpp.llnl.gov/pub

Scientific paper

10.1086/118004

We have obtained near-infrared imaging and an optical spectrum of the proto-planetary nebula IRAS~07131-0147, a highly polarized bipolar reflection nebula believed to be in evolutionary transition from the asymptotic giant branch to the planetary nebula phase. Our images reveal point reflection symmetry in the lobes - a relatively rare morphological feature. We place an upper limit on the distance of 6.5 kpc. Utilizing numerical integrations of single grain scattering models we find the nebula to lie at an inclination angle of i=20\pm5 degrees in the plane of the sky. We present a refined geometric interpretation of IRAS~07131-0147 consistent with our new observational data and argue that the central star is likely to have an as yet undetected binary companion.

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