Sr II and [Sr II] emission in the ejecta of η Carinae

Torgil Zethson, Theodore R. Gull, Henrik Hartman, Sveneric Johansson, Kris Davidson, Kazunori Ishibashi

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)322-326
Number of pages5
JournalAstronomical Journal
Volume122
Issue number1
DOIs
StatePublished - Jul 1 2001

Keywords

  • Circumstellar matter
  • Stars: individual (η Carinae)
  • Stars: variables: other

Fingerprint Dive into the research topics of 'Sr II and [Sr II] emission in the ejecta of η Carinae'. Together they form a unique fingerprint.

  • Cite this

    Zethson, T., Gull, T. R., Hartman, H., Johansson, S., Davidson, K., & Ishibashi, K. (2001). Sr II and [Sr II] emission in the ejecta of η Carinae. Astronomical Journal, 122(1), 322-326. https://doi.org/10.1086/321119