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Strong helium 10830Å absorption in Sakurai's object (V4334 Sgr)

Eyres, S.P.S; Smalley, B; Geballe, T.R; Evans, A; Asplund, Martin; Tyne, V.H


We report the appearance and evolution during 1998 of strong neutral helium ^3S-^3P^o absorption at ~10830Å in Sakurai's Object (V4334 Sgr), which is believed to be a planetary nebula nucleus (PNN) undergoing a final helium shell-flash. First detected on 1998 March 18, the profile of the Hei feature is P Cygni-like. The absorption depth has increased in three subsequent spectra in 1998. If this is owing to a wind, the profile indicates a wind velocity of ~670+/-50kms^-1. The strong Ci 10690-Å...[Show more]

CollectionsANU Research Publications
Date published: 1999
Type: Journal article


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