Effects of the mass transfer and presence of the third components in close binary stellar systems
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2017
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Одеський національний університет імені І. І. Мечникова
Анотація
In our research, we have studied 6 close
binary stellar systems which are eclipsing variables of β
Lyrae and W Ursae Majoris types of variability. We have
studied their O-C curves. To build them, we used
moments of minima, listed in the BRNO database. Also,
we used ones, which we obtained as the result of
processing of observational data taken from AAVSO
database. As the result of the O-C analysis, we detected
that all of these stars have parabolic O-C curves, which
might be caused by mass transfer from one component to
another. In an addition, 3 from researched stars (U Peg,
V0523 Cas and WZ Cyg) have superimposed parabolic
and cyclic O-C changes that could be caused by presence
of the third components in the systems. Also, we
calculated minimal possible masses of third components,
rates of the mass transfer for these systems and corrected
the ephemerides.
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Ключові слова
eclipsing binaries, O-C curve, β Lyrае type, W Ursae Majoris type, ephemerid, WZ Cyg, V0388 Cyg, SX Aur, BF Aur, U Peg, V0523 Cas
Бібліографічний опис
Odessa Astronomical publications = Одесские астрономические публикации = Одеські астрономічні публікації