Sh2-188: a model for a speedy PN
Abstract
Sh2-188 is thought to be an ancient planetary nebula in the galactic disk. It appears to be one-sided with recent observations revealing structure behind the filamentary limb. We postulate that Sh2-188 is interacting with the ISM and simulate it in terms of a ``triple-wind'' model comprising of the usual ``fast'' and ``slow'' interacting stellar winds plus the wind due to motion through the ISM. We have run simulations at various velocities of the central star relative to the ISM and find that a high velocity of 125 km/s best approximates the observed structure. We also suggest that Sh2-188 is younger than previously thought and that much of the mass lost on the AGB has been swept downstream.
Cite
@article{arxiv.astro-ph/0506064,
title = {Sh2-188: a model for a speedy PN},
author = {C. J. Wareing and T. J. O'Brien and A. A. Zijlstra and J. E. Drew},
journal= {arXiv preprint arXiv:astro-ph/0506064},
year = {2007}
}
Comments
5 pages, 3 figures, Proceedings of the "Stellar end products" workshop, 13-15 April 2005, Granada, Spain, ed. M.A. Perez-Torres. To appear in Vol. 77 (Jan 2006) of MmSAI. Reference corrected, start of 2nd paragraph in discussion corrected, image scaling corrected