Further Investigation Of The Winds Of Eta Car A And B

Details Further Investigation Of The Winds Of Eta Car A And B Further Investigation Of The Winds Of Eta Car A And B

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5121n&link_type=abstract

American Astronomical Society, AAS Meeting #211, #51.21; Bulletin of the American Astronomical Society, Vol. 39, p.818

Astronomy and Astrophysics

Astronomy

Scientific paper

A majority of all observations of Eta Car supports the suggested duality of the system, but the conditions in the inner core of the nebula and, especially, the character of Eta Car B, evade direct measurements. We utilize VLT/UVES spectra obtained either by observing the system in line-of-sight towards the stellar system; or via radiation reflected by the Homunculus. These additional vantage points provide information about the inhomogeneous and non-symmetric winds from the central objects, and how the system changes with orbital phase. We investigate the excitation/ionization conditions by tracing transitions with different spectral characteristics over the 5.54 yr orbital period. The nebular-scattered line profiles are compared with corresponding high-angular resolution HST/STIS observations in line-of-sight towards the Eta Car binary. The line dependent behavior, provides additional information in the quest to understand the Eta Car binary and its close environment.

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