The ultraviolet spectrum of the binary system KS Persei (HD 30353)

• Published in: Astrophysics and space science Vol. 158; no. 2; pp. 223 - 228
• Main Author: TEKTUNALI, H. G
• Format: Journal Article
• Language: English
• Published: Dordrecht Kluwer 01.08.1989
• Subjects: Astronomy; Binary and multiple stars; Earth, ocean, space; Exact sciences and technology; Spectroscopic binaries. Close binaries; Stars; Absorption line; Hot star; Spectroscopic binary; Ultraviolet spectrum; Effective temperature; Orbital element; Spectroscopical observation; Resonance line
• ISSN: 0004-640X; 1572-946X
• DOI: 10.1007/BF00639726

Nine high- and low-resolution IEU spectra at different orbital phases during different cycles, of the hydrogen-poor single-lines spectroscopic binary KS Per (HD 30353) have been studied. The near-UV spectrum is characterized by the presence of several lines of once ionized metals which show the same orbital RV shifts observed in the visual range. The Mg II resonance lines present a sharp interstellar + circumstellar core and an emission peak at about 83 and 92 km/s. The far UV spectrum is characterized by the presence of strong absorptions of the resonance lines of N V, C IV, Si IV, Si III. Direct determination of the IS extinction from the 2200 A feature gives E(B - V) = 0.33. A comparison of corrected logarithmic continuous energy distribution with the theoretical models by Kurucz, indicates that the companion is a hot star, Te = 15,000 K; logg = 4. A comparison with recent UV work on Upsilon Sgr, shows that, KS Per is very similar to Upsilon Sgr. (Author)