Multi-wavelength diffraction-limited imaging of the evolved carbon star IRC +10216, II
Abstract
High angular resolution images of IRC +10216 taken at various bandpasses within the near-infrared h, k & l bands are presented. The maps have the highest angular resolution yet recovered, and were reconstructed from interferometric measurements obtained at the Keck 1 telescope in 1997 December and 1998 April, forming a subset of a 7-epoch monitoring program presented earlier [paper 1]. Systematic changes with observing wavelength are found and discussed in context of present geometrical models for the circumstellar envelope. With these new high-resolution, multi-wavelength data and contemporaneous photometry, we also re-visit the hypothesis that the bright compact Core of the nebula (component `A') marks the location of the central carbon star. We find that directly measured properties of the Core (angular size, flux density, color temperature) are consistent with a reddened carbon star photosphere (line-of-sight tau=5.3).
Cite
@article{arxiv.astro-ph/0503205,
title = {Multi-wavelength diffraction-limited imaging of the evolved carbon star IRC +10216, II},
author = {P. G. Tuthill and J. D. Monnier and W. C. Danchi},
journal= {arXiv preprint arXiv:astro-ph/0503205},
year = {2009}
}
Comments
Accepted ApJ, Jan 2005