Astrophys. J., Suppl. Ser., 144, 21-45 (2003/January-0)
Synthetic high-resolution line spectra of star-forming galaxies below 1200 Å.
ROBERT C., PELLERIN A., ALOISI A., LEITHERER C., HOOPES C. and HECKMAN T.M.
Abstract (from CDS):
We have generated a set of far-ultraviolet stellar libraries using spectra of OB and Wolf-Rayet stars in the Galaxy and the Large and Small Magellanic Cloud. The spectra were collected with the Far Ultraviolet Spectroscopic Explorer and cover a wavelength range from 1003.1 to 1182.7 Å at a resolution of 0.127 Å. The libraries extend from the earliest O to late-O and early-B stars for the Magellanic Cloud and Galactic libraries, respectively. Attention is paid to the complex blending of stellar and interstellar lines, which can be significant, especially in models using Galactic stars. The most severe contamination is due to molecular hydrogen. Using a simple model for the H2line strength, we were able to remove the molecular hydrogen lines in a subset of Magellanic Cloud stars. Variations of the photospheric and wind features of C III λ1176, O VI λλ1032, 1038, P V λλ1118, 1128, and S IV λλ1063, 1073, 1074 are discussed as a function of temperature and luminosity class. The spectral libraries were implemented into the LavalSB and Starburst99 packages and used to compute a standard set of synthetic spectra of star-forming galaxies. Representative spectra are presented for various initial mass functions and star formation histories. The valid parameter space is confined to the youngest ages of less than ≃10 Myr for an instantaneous burst, prior to the age when incompleteness of spectral types in the libraries sets in. For a continuous burst at solar metallicity, the parameter space is not limited. The suite of models is useful for interpreting the rest-frame far-ultraviolet in local and high-redshift galaxies.
Galaxies: Starburst - Galaxies: Stellar Content - Stars: Early-Type - Stars: Mass Loss - Ultraviolet: Galaxies
VizieR on-line data:
<Available at CDS (J/ApJS/144/21): table1.dat table2.dat refs.dat>
Tables 1, 2: FUSE ANNNNNNN N=155+85.
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