Variable Unidentified Emission Near 6307 AA in Eta Carinae

Details Variable Unidentified Emission Near 6307 AA in Eta Carinae Variable Unidentified Emission Near 6307 AA in Eta Carinae

2006-03-07

arxiv.org/abs/astro-ph/0603168v1

Publ.Astron.Soc.Pac. 118 (2006) 697-705

Astronomy and Astrophysics

Astrophysics

22 pages, 7 Figures, 3 Tables; Accepted PASP, appearing May 2006

Scientific paper

10.1086/503877

We have discovered a conspicuous unidentified variable feature near 6307 AA in the spectrum of Eta Carinae which is spatially unresolved from the central star and its wind (r < 200--300 AU). It is significant for two reasons: such prominent unidentified lines are now rare in this object, and this feature varies strongly and systematically. It exhibits a combination of characteristics which, so far as we know are unique in Eta Carinae's spectrum. It may provide insights into the recurrent spectroscopic events and the star's long-term brightening.

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