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The ejecta of η Carinae

Published online by Cambridge University Press:  26 May 2016

Theodore R. Gull ,
Kris Davidson ,
Kazunori Ishibashi  and
the η Carinae HST-stis Team
Theodore R. Gull
Affiliation:
NASA's Goddard Space Flight Center, Code 681, Greenbelt, MD 20771, USA
Kris Davidson
Affiliation:
Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USA
Kazunori Ishibashi
Affiliation:
Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NE80-6011, Cambridge, MA 02139, USA

Abstract

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Since New Year's Eve 1998, we have been studying η Carinae and the surrounding complex ejecta with the HST-stis instrument. Angular resolution of 0.1″ and spectral resolving power R = 5000-118000 have revealed a multitude of emission and absorption lines identified from many heavy elements. Some data was obtained during the 1998.0 spectral minimum and now we have an HST Treasury proposal accepted to follow the star and ejecta changes across the 2003.5 minimum. To date, we identify the Homunculus as an outer reflection nebula, an internal ionized Little Homunculus, a very small shell (0″.74 in diameter), the Weigelt-blobs, and a peculiar structure called the strontium emission filament. More recently an even smaller extended structure (0″.14 diameter) has been found to surround the Central Source as seen in the ultraviolet.

Type
Part 1. Atmospheres of Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 194 - 195
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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