AAS 195th Meeting, January 2000
Session 75. Intrinsic Variable Stars
Display, Friday, January 14, 2000, 9:20am-6:30pm, Grand Hall

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[75.14] Chandra Observation of Eta Carina

F.D. Seward, N.R. Evans, M. Karovska, A. Prestwich, E.M. Schlegel (Harvard-Smithsonian CfA), M. Corcoran (GSFC), L. Townsley (Penn State)

A 10 ks observation with the ACIS-I imaging detector reveals a partial, 1' diameter ring of X-ray emission surrounding a central source. The central source is an 8'' diameter region of diffuse emission surrounding a hard unresolved source. All emission from this central region is heavily absorbed, indicating that it originates in the vicinity of the central star(s). The position of the unresolved source is the same as that of the bright central optical object. \\

The outer X-ray ring is of non-uniform brightness and temperature and surrounds the outermost optical nebulosity. An X-ray bright knot is apparently associated with strong N emission in the ``S-Ridge''. The pre-shock velocity implied by the X-ray temperatures and the size of the ring suggests an origin in an event centuries before the ``Great Erruption'' in 1843. X-rays are also detected from nearby early stars. \\

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