Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rmxaa...6..205s&link_type=abstract
(International Astronomical Union, Reunion Regional Latinoamericana de Astronomia, 2nd, Merida, Venezuela, Jan. 19-23, 1981) Rev
Astronomy and Astrophysics
Astronomy
1
Eclipsing Binary Stars, Resonance Lines, Stellar Spectra, Ultraviolet Spectra, Fine Structure, Iue, Silicon
Scientific paper
IUE ultraviolet spectra of the eclipsing binary Mu(1) Scorpii are examined. The available spectra correspond to primary eclipse and to one of the quadratures, and only display absorption lines. Many lines arising from resonance transitions are apparent and can be placed into groups. These include: sharp and deep lines identified with elements like O I, N I, C II, Si II, Al II, Fe II, Mg II which are probably circumstellar and interstellar; lines that have about 1.5 FWHM identified with elements like Si III and Al III; lines about 2 A FWHM identified as Si IV; low excitation, relatively deep lines of about 1 A FWHM of C II, Si II, Si III, and Ti III; and higher excitation, relatively broad and shallow lines of C III. The resonance lines of Si IV are characterized by a fine structure of as many as nine components which suggest velocity values ranging from -180 to about +150 km/s.
Garcia Lia G.
Sahade Jorge
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