Variable Unidentified Emission Near 6307 AA in Eta Carinae
arXiv:astro-ph/0603168 · doi:10.1086/503877
Abstract
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.
22 pages, 7 Figures, 3 Tables; Accepted PASP, appearing May 2006