Near-infrared observations of the proto-planetary nebula IRAS 07131-0147
- Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
- Department of Astronomy, University of Washington, Seattle, Washington 98195 (United States)
We have obtained near-infrared imaging and an optical spectrum of the proto-planetary nebula IRAS 07131{minus}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 {emdash} 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 {ital i}=20{plus_minus}5 degrees in the plane of the sky. We present a refined geometric interpretation of IRAS 07131{minus}0147 consistent with our new observational data and argue that the central star is likely to have an as yet undetected binary companion.
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 285512
- Journal Information:
- Astronomical Journal, Journal Name: Astronomical Journal Journal Issue: 1 Vol. 112; ISSN ANJOAA; ISSN 0004-6256
- Country of Publication:
- United States
- Language:
- English
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