2005MNRAS.364..731J

Query : 2005MNRAS.364..731J

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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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
2 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
3 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
4 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 624 0

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