N. A. Virnina


We present the results of investigation
of the light curves of 27 newly discovered binary
systems. Among the examined curves, there were
10 curves with statistically significant asymmetry
of maximums, according the 3σ criterion for the
difference between the maximal brightness. Half
of these 10 curves have a higher first maximum,
another half the second one. Two of these 10 curves,
USNO-B1.0 1629-0064825 = VSX J052807.9+725606
and USNO-B1.0 1586-0116785, show the largest
difference between magnitudes in maxima. The star
VSX J052807.9+725606 also shows the secondary
minimum, which is shifted from the phase φ = 0.5.
The shape of the curve argues that the physical
processes of this star could be close to that of well
known short periodic binary system V361 Lyr, which
has a spot on the surface of one star of the system.
Another star, USNO-B1.0 1586-0116785, probably has
a cold spot, or several spots, in the photosphere of one
of the components.

Ключові слова

Variable stars, eclipsing, interacting binary, impactors

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