A High-Resolution Study of Eta Carinae's Outer Ejecta

Details A High-Resolution Study of Eta Carinae's Outer Ejecta A High-Resolution Study of Eta Carinae's Outer Ejecta

2002-07-25

arxiv.org/abs/astro-ph/0207541v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in : K.A. van der Hucht, A. Herrero & C. Esteban (eds.), A Massive Star Odyssey, from Main Sequen

Scientific paper

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.

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