High resolution echelle spectroscopy in ground-based UV

is a powerful facility for study of chemical evolution of early Galaxy .

An atlas of high resolution ( R = 60000 ) in the poor studied wavelength range 3550–5000 ÅÅ for 4 metal-deficient stars in the interval of metallicity -3.0 < [ Fe / H ] < -0.6 , effective temperature 4750 < T _ { eff } < 5900 K , surface gravity 1.6 < \lg { g } < 5.0 is produced .
Details of the method of producing a spectral atlas , line identifications , stellar atmospheric parameters determination are described .
Based on these spectral data , we determined model atmosphere parameters and calculated abundances of 25 chemical elements .