A High-Resolution Study of Eta Carinae's Outer Ejecta
Abstract
Eta Carinae is a very luminous and unstable evolved star. Outflowing material ejected during the star's giant eruption in 1843 surrounds it as a nebula which consists of an inner bipolar region(the Homunculus) and the Outer Ejecta. The outer ejecta is very filamentary and shaped irregularly. Kinematic analysis, however, shows a regular bi-directional expansion despite of the complex morphology. Radial velocities in the outer ejecta reach up to 2000 kms/s and give rise to X-ray emission first detected by ROSAT. We will present a detailed study of the outer ejecta based on HST images, high-resolution echelle spectra for kinematic studies, images from CHANDRA/ACIS and HST-STIS spectra.
Keywords
Cite
@article{arxiv.astro-ph/0207541,
title = {A High-Resolution Study of Eta Carinae's Outer Ejecta},
author = {Kerstin Weis and Michael F. Corcoran and Kris Davidson and Roberta M. Humphreys},
journal= {arXiv preprint arXiv:astro-ph/0207541},
year = {2007}
}
Comments
2 pages, 1 figure, to appear in : K.A. van der Hucht, A. Herrero & C. Esteban (eds.), A Massive Star Odyssey, from Main Sequence to Supernova, Proc. IAU Symp. No. 212 (San Francisco: ASP); paper with image in high-resolution at http://www.mpifr-bonn.mpg.de/staff/kweis/publications.html