Anomalously bright UV lines of Fe II as a probe of gas condensations in the vicinity of hot stars

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Abstract

Two UV lines of Fe II at 2507/2509 Å are extremely bright inspatially resolved HST/STIS spectra of dense gas condensations (the socalled Weigelt blobs) close to the central star of eta Carinae. Thelines also appear unresolved in HST/FOS spectra of the star AE And.Under normal conditions the lines should hardly be observable. Based onrecent studies of the formation of thelambdalambda2507/2509 lines as part of a radiative cycledriven by HLyalpha pumping and including stimulated emission wepropose the possibility of using them as a probe of non-homogeneities ingas condensations located outside hot, massive stars.

Detaljer

Författare
  • Sveneric Johansson
  • Vladilen Letokhov
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Astronomi, astrofysik och kosmologi

Nyckelord

Originalspråkengelska
Sidor (från-till)771-776
TidskriftAstronomy & Astrophysics
Volym412
StatusPublished - 2003
PublikationskategoriForskning
Peer review utfördJa

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