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Sr II and [Sr II] Emission in the Ejecta of eta Carinae

Zethson, Torgil ; Gull, Theodore R. ; Hartman, Henrik LU orcid ; Johansson, Sveneric LU ; Davidson, Kris and Ishibashi, Kazunori (2001) In The Astronomical Journal 122(1). p.322-326
Abstract
We have discovered four extremely surprising emission lines of strontiumin ejecta near eta Carinae. Hubble Space Telescope (HST) SpaceTelescope Imaging Spectrograph (STIS) observations made in 1999 show twonarrow features whose wavelengths correspond to the forbiddentransitions of Sr II, and we have found no other plausibleidentification for these lines. The identifications are confirmed by newHST/STIS observations of the same stellar position, in which the Sr IIresonance lines are observed. Moreover, [Ti II, [Ni II, [Mn II, and[Co II lines are unusually strong relative to [Fe II at the sameposition. Based on observations made with the NASA/ESA Hubble SpaceTelescope and supported by STIS IDT GTO 8036 and grant GO 8327 from theSpace... (More)
We have discovered four extremely surprising emission lines of strontiumin ejecta near eta Carinae. Hubble Space Telescope (HST) SpaceTelescope Imaging Spectrograph (STIS) observations made in 1999 show twonarrow features whose wavelengths correspond to the forbiddentransitions of Sr II, and we have found no other plausibleidentification for these lines. The identifications are confirmed by newHST/STIS observations of the same stellar position, in which the Sr IIresonance lines are observed. Moreover, [Ti II, [Ni II, [Mn II, and[Co II lines are unusually strong relative to [Fe II at the sameposition. Based on observations made with the NASA/ESA Hubble SpaceTelescope and supported by STIS IDT GTO 8036 and grant GO 8327 from theSpace Telescope Science Institute. The STScI is operated by theAssociation of Universities for Research in Astronomy, Inc., under NASAcontract NAS 5-26555. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Stars: Circumstellar Matter, stars: individual (eta Carinae), Stars: Variables: Other
in
The Astronomical Journal
volume
122
issue
1
pages
322 - 326
publisher
IOP Publishing
external identifiers
  • scopus:0040489101
ISSN
1538-3881
DOI
10.1086/321119
language
English
LU publication?
yes
id
00c3ea16-a355-44c3-8d49-b936a7d5eaa2 (old id 130180)
date added to LUP
2016-04-04 11:48:34
date last changed
2025-04-04 14:25:01
@article{00c3ea16-a355-44c3-8d49-b936a7d5eaa2,
  abstract     = {{We have discovered four extremely surprising emission lines of strontiumin ejecta near eta Carinae. Hubble Space Telescope (HST) SpaceTelescope Imaging Spectrograph (STIS) observations made in 1999 show twonarrow features whose wavelengths correspond to the forbiddentransitions of Sr II, and we have found no other plausibleidentification for these lines. The identifications are confirmed by newHST/STIS observations of the same stellar position, in which the Sr IIresonance lines are observed. Moreover, [Ti II, [Ni II, [Mn II, and[Co II lines are unusually strong relative to [Fe II at the sameposition. Based on observations made with the NASA/ESA Hubble SpaceTelescope and supported by STIS IDT GTO 8036 and grant GO 8327 from theSpace Telescope Science Institute. The STScI is operated by theAssociation of Universities for Research in Astronomy, Inc., under NASAcontract NAS 5-26555.}},
  author       = {{Zethson, Torgil and Gull, Theodore R. and Hartman, Henrik and Johansson, Sveneric and Davidson, Kris and Ishibashi, Kazunori}},
  issn         = {{1538-3881}},
  keywords     = {{Stars: Circumstellar Matter; stars: individual (eta Carinae); Stars: Variables: Other}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{322--326}},
  publisher    = {{IOP Publishing}},
  series       = {{The Astronomical Journal}},
  title        = {{Sr II and [Sr II] Emission in the Ejecta of eta Carinae}},
  url          = {{https://lup.lub.lu.se/search/files/5860220/624126.pdf}},
  doi          = {{10.1086/321119}},
  volume       = {{122}},
  year         = {{2001}},
}