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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.34 no.s2 (2007), pp. 396-399
On Some Ambiguities in Defining the Nature of Observed Double Systems on the Basis of Their Radial Velocity
G. Triffonova1, D. Petkova1, V. Shkodrov2
1Shumen University, Faculty of Science, 9700 Shumen, Bulgaria
2Institute of Astronomy, Bulg. Acad. Sci., BG-1784 Sofia, Bulgaria
go back1Shumen University, Faculty of Science, 9700 Shumen, Bulgaria
2Institute of Astronomy, Bulg. Acad. Sci., BG-1784 Sofia, Bulgaria
Abstract. This text presents an analysis of the orbital motion of quasi-spectral and star-plane binary systems, arguing that it is often impossible to distinguish them from each other on the basis of their spectral observation.
The motion of the quasispectral binary system is modeled and the theoretically obtained amplitudes are compared with the observed ones in the extrasolar planetary systems, showing that the amplitude of radial velocities in the two types of systems are of the same order and could not present a certain ground for these systems' definition.