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A high-resolution study of η Carinae's outer ejecta

Published online by Cambridge University Press:  26 May 2016

Kerstin Weis ,
Michael F. Corcoran ,
Kris Davidson  and
Roberta M. Humphreys
Kerstin Weis
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, BRD Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USA Feodor-Lynen-fellow, Alexander-von-Humboldt foundation
Michael F. Corcoran
Affiliation:
Universities Space Research Association, 7501 Forbes Blvd, Ste 206, Seabrook, MD 20706, USA Laboratory for High Energy Astrophysics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Kris Davidson
Affiliation:
Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USA
Roberta M. Humphreys
Affiliation:
Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USA

Abstract

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η Car 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, coined 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 2000 km s–1 and give rise to X-ray emission, as 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.

Type
Part 4. Feedback from Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 759 - 760
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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