Molecular line observations of proto-planetary nebulae
Abstract
We present our recent results on mm-wave CO observations of proto-planetary nebulae. These include high-resolution interferometric maps of various CO lines in three well known bipolar PPNe: M1-92, M2-56 and OH231.8+4.2. The global properties of the high velocity molecular emission in post-AGB sources have been also studied, by means of high-sensitivity single dish observations of the J=1-0 and 2-1 lines of 12CO and 13CO. We discuss the implications of these results to constrain the origin of the post-AGB molecular high-velocity winds and the shaping of bipolar PPNe and PNe. In addition, we also present the results of an interferometric map of the molecular envelope around the luminous high-latitude star 89 Her, a low mass post-AGB source which is also a close binary system.
Keywords
Cite
@article{arxiv.astro-ph/9910081,
title = {Molecular line observations of proto-planetary nebulae},
author = {J. Alcolea and V. Bujarrabal and A. Castro-Carrizo and C. Sanchez Contreras and R. Neri and J. Zweigle},
journal= {arXiv preprint arXiv:astro-ph/9910081},
year = {2007}
}
Comments
8 pages, LaTeX2e + 2 eps figures, it uses epsf style To appear in ``Asymmetrical Planetary Nebulae II: from Origins to Microstructures,'' ASP Conference Series, J.H. Kastner, N. Soker, & S.A. Rappaport, eds