SIMBAD references

2008MNRAS.383..729T - Mon. Not. R. Astron. Soc., 383, 729-740 (2008/January-2)

Iron abundances from optical FeIII absorption lines in B-type stellar spectra.

THOMPSON H.M.A., KEENAN F.P., DUFTON P.L., TRUNDLE C., RYANS R.S.I. and CROWTHER P.A.

Abstract (from CDS):

The role of optical Feiii absorption lines in B-type stars as iron abundance diagnostics is considered. To date, ultraviolet Fe lines have been widely used in B-type stars, although line blending can severely hinder their diagnostic power. Using optical spectra, covering a wavelength range ∼3560-9200Å, a sample of Galactic B-type main-sequence and supergiant stars of spectral types B0.5 to B7 are investigated. A comparison of the observed Feiii spectra of supergiants, and those predicted from the model atmosphere codes tlusty [plane-parallel, non-local thermodynamic equilibrium (LTE)], with spectra generated using synspec (LTE), and cmfgen (spherical, non-LTE), reveal that non-LTE effects appear small. In addition, a sample of main-sequence and supergiant objects, observed with the Fiber-fed Extended Range Optical Spectrograph (FEROS), reveal LTE abundance estimates consistent with the Galactic environment and previous optical studies. Based on the present study, we list a number of Feiii transitions which we recommend for estimating the iron abundance from early B-type stellar spectra.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): atomic data - line: identification - stars: abundances - supergiants - stars: variables: other - Galaxy: abundances

Status at CDS:  

Simbad objects: 42

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