Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pazh...10..439v&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 10, June 1984, p. 439-442) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, May-June
Astronomy and Astrophysics
Astronomy
1
Emission Spectra, Line Spectra, Stellar Spectra, Variable Stars, Balmer Series, H Lines, Radial Velocity
Scientific paper
Six spectra with 3-5 A resolution were obtained of RZ Sgr in August 1983. The viewing lasted over 2 hr and covered only a quiescent period. Doubled broad hydrogen emission lines were detected which decreased in bifurcation at higher line numbers. Some similarities were found with the object Z Cha. Attempts to measure radial velocities using the H-beta lines revealed a 97 min radial velocity variation, in line with previous estimates. The line doubling is attributed to orbital plane inclination. A variation in the absorption dip-calculated radial velocity is taken to indicate that a secondary binary component has a superheated side that has weaker emission lines than the primary. The dip shift arises when the weak lines blend with the primary's lines. Finally, a 1.8 mass ratio is estimated for the binary components, based on the derived velocity curves.
Nazarenko I. I.
Vojkhanskaya N. F.
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