SIMBAD references

2005MNRAS.364..731J - Mon. Not. R. Astron. Soc., 364, 731-737 (2005/December-1)

Astrophysical laser operating in the OI 8446-Åline in the Weigelt blobs of η Carinae.

JOHANSSON S. and LETOKHOV V.S.

Abstract (from CDS):

Within the framework of a simple model of photophysical processes in the Weigelt blobs in the vicinity of the luminous blue variable (LBV) star η Carinae, we explain the presence of the fluorescent <Oi> 8446-Åand forbidden [Oi] 6300-Ålines as well as the absence of the allowed Oi 7774-Åline in spectra recorded with the Hubble Space Telescope (HST)/STIS instrument (Gull et al.). From atomic data and estimated stellar parameters we demonstrate that there is a population inversion and stimulated emission in the 3p3P-3s3S transition λ8446 due to photoexcitation by accidental resonance (PAR) by H Lyβ radiation.

Abstract Copyright: 2005 The Authors. Journal compilation © 2005 RAS

Journal keyword(s): atomic processes - line: formation - radiation mechanisms: non-thermal - stars: individual: η Carinae - infrared: stars

CDS comments: Weigelt blobs B,C,D are [HW88] B,C,D in SIMBAD.

Simbad objects: 4

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