TY - JOUR
T1 - Sr II and [Sr II] emission in the ejecta of η Carinae
AU - Zethson, Torgil
AU - Gull, Theodore R.
AU - Hartman, Henrik
AU - Johansson, Sveneric
AU - Davidson, Kris
AU - Ishibashi, Kazunori
PY - 2001/7
Y1 - 2001/7
N2 - We have discovered four extremely surprising emission lines of strontium in ejecta near η Carinae. Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) observations made in 1999 show two narrow features whose wavelengths correspond to the forbidden transitions of Sr II, and we have found no other plausible identification for these lines. The identifications are confirmed by new HST/STIS observations of the same stellar position, in which the Sr II resonance lines are observed. Moreover, [Ti II], [Ni II], [Mn II], and [Co II] lines are unusually strong relative to [Fe II] at the same position.
AB - We have discovered four extremely surprising emission lines of strontium in ejecta near η Carinae. Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) observations made in 1999 show two narrow features whose wavelengths correspond to the forbidden transitions of Sr II, and we have found no other plausible identification for these lines. The identifications are confirmed by new HST/STIS observations of the same stellar position, in which the Sr II resonance lines are observed. Moreover, [Ti II], [Ni II], [Mn II], and [Co II] lines are unusually strong relative to [Fe II] at the same position.
KW - Circumstellar matter
KW - Stars: individual (η Carinae)
KW - Stars: variables: other
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U2 - 10.1086/321119
DO - 10.1086/321119
M3 - Article
AN - SCOPUS:0040489101
SN - 0004-6256
VL - 122
SP - 322
EP - 326
JO - Astronomical Journal
JF - Astronomical Journal
IS - 1
ER -