The Ultraviolet Spectrum of the Binary System Sz-Piscium

Abstract

In this paper we study the far-UV as well as the UV spectrum of the spectroscopic binary system SZ Psc in the wavelength ranges λλ1235–1950 Å and λλ2710–3090 Å, respectively, from spectra obtained with the International Ultraviolet Explorer (IUE). The UV spectrum of SZ Psc is mainly an emission spectrum. The short wavelength region includes emission lines formed from the low chromosphere to the transition region (e.g., SiIV,CIV, andNV) and also a deep and broad absorption line of FeII. The MgII[1] resonance doublet at about λ2800 Å presents a P Cygni profile and a multiple structure with two emission and two absorption satellite components. We also present the emission measure diagram in the temperature region 4.4<logT_e<53.