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Paper: On the X-ray Emission of η Carinae's Outer Ejecta
Volume: 262, The High Energy Universe at Sharp Focus: Chandra Science
Page: 275
Authors: Weis, K.; Corcoran, M. F.; Davidson, K.
Abstract: The extremely luminous and unstable star eta Carinae is surrounded by an ejecta formed during the star's giant eruption around 1843. The optical nebula consists of an inner region, the bipolar Homunculus and the outer ejecta. The X-ray emission as detected in ROSAT and CHANDRA nevertheless shows a hook shaped emission structure mainly at the position of the outer ejecta substantially larger than the Homunculus. We present results of a comparative study of the optical morphology, the kinematics and the X-ray emission of the outer ejecta around eta Carinae. In general we find that the X-ray emission traces the shocks of faster moving knots in the outer ejecta. First results of CHANDRA/ACIS data will be presented, with spectra of selected areas in the outer ejecta giving insight to the conditions (temperature, present elements and degree of ionisation) of the hot gas. The X-ray spectra will again be compared to the kinematics of the gas as known from our optical spectra and the local densities as far as they could be derived.
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