Low-ionization structures in planetary nebulae
Abstract
We present new results of a program aimed at studying the physical properties, origin and evolution of those phenomena which go under the somewhat generic definition of "low-ionization, small-scale structures in PNe". We have obtained morphological and kinematical data for 10 PNe, finding low-ionization structures with very different properties relative to each other, in terms of expansion velocities, shapes, sizes and locations relatively to the main nebular components. It is clear that several physical processes have to be considered in order to account for the formation and evolution of the different structures observed. We present here some results that are illustrative of our work - on IC 4593, NGC 3918, K 1-2, Wray 17-1, NGC 6337, He 2-186 and K 4-47 - and some of the questions that we try to address.
Cite
@article{arxiv.astro-ph/9911107,
title = {Low-ionization structures in planetary nebulae},
author = {D. R. Goncalves and R. M. L. Corradi and E. Villaver and A. Mampaso and M. Perinotto},
journal= {arXiv preprint arXiv:astro-ph/9911107},
year = {2007}
}
Comments
4 pages, to appear in "Asymmetrical Planetary Nebulae II: from Origins to Microstructures", ASP Conference Series, J.H. Kastner, N. Soker, & S.A. Rappaport, eds