The remarkable outer ejecta of η Carinae

Details The remarkable outer ejecta of η Carinae The remarkable outer ejecta of η Carinae

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.1408w&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #14.08; Bulletin of the American Astronomical Society, Vol. 33, p.808

Astronomy and Astrophysics

Astronomy

Scientific paper

The luminous unstable star η Carinae is surrounded by ejecta formed during the star's giant eruption around 1843. The nebula consists of an inner region, the bipolar Homunculus and the outer ejecta. We present a detailed analysis of the optical morphology, the kinematics and the soft X-ray emission of the outer ejecta around η Carinae. In addition to the global overview of the expansion pattern of the outer ejecta, which was found to be bi-directional, we emphasize the presence of very high radial velocities and the correlation of these structures with the X-ray emission. In this context we show that the soft X-ray emission of the outer ejecta results from shocks formed by the high velocity gas. Finally a discussion on the nature of unique structures within the outer ejecta called the Strings will be presented. The Strings are highly collimated, narrow high-velocity features following a linaerly increasing velocity law.

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