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[49.04] The -145 km/s Absorption System of Eta Carinae

G.L. Vieira (SSAI,NASA's GSFC), T.R. Gull (NASA's GSFC), A.C. Danks (L3-Analytics, NASA's GSFC), S. Johansson (Lund Observatory)

With the STIS E230H mode (R~118,000), we have identified about twenty absorption components in line of sight from Eta Carinae. Two components, one at -513 km/s and another at -145 km/s, are quite different in character from the others, mostly at intermediate velocities (See adjacent posters by T. Gull and A. Danks). The -145 km/s component is significantly wider in fwhm, is seen in many more species, and the lower level can be above 20,000 cm-1, well above the 2000 cm-1 noted in the -513 km/s component. In the spectral region from 2400 to 3160A, approximately 500 absorption lines have been identified.

In this poster, we will present line identifications and atomic parameters of the measured lines, hopefully providing insight as to what levels are being excited and by what processes.

Observations were accomplished through STScI under proposal 9242 (Danks, P.I.). Funding is through the STIS GTO resources.

The author(s) of this abstract have provided an email address for comments about the abstract: gull@sea.gsfc.nasa.gov

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.