PREDNASAJUCI / LECTURER :
Elena Barsukova (Special Astrophysical Observatory of the Russian
Academy of Sciences, Russia)
Co-author: Vitaly Goranskij (SAI, Moscow University)

NAZOV / TITLE :
Discovery of pulsations in B[e] component of X-ray transient
and multiple system CI Cam.

ABSTRAKT / ABSTRACT :
CI Cam underwent a strong outburst in all ranges of
electromagnetic waves occured in 1998. It contains a hot star with B[e]
phenomenon, white dwarf companion on a 19 day elliptical orbit and
hypothetic massive component which causes the slow shift of wind lines
of B[e] star. Some investigatots treate the outburst as an explosion
of hydrogen accumulated on the surface of the white dwarf due to
accretion from stellar wind. So, CI Cam may be a kind of a
classical nova. Our accurate photometry shows night-to-night
variability of CI Cam in the scale of hours which suggests that
its B type component is a mixed mode pulsator. The relation
of pulsations with the wind and circumstellar disks in B type stars
is discussed.