Other
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jena.confe..95s&link_type=abstract
"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 95-95"
Other
Scientific paper
The structure and formation of the circumbinary envelope in a semidetached binary star are considered. Using 3D gasdynamical simulation we studied the flow structure when system has reached stationary accretion rate. Results of simulation show that outer regions of circumbinary envelope are supplied with matter periodically ejected from the accretion disk and halo through the vicinity of Lagrangian point L3. In the proposed mechanism the shape of the accretion disk is generally determined by the orientation of the precessional spiral wave. The precessional wave (and consequently, significant part of accretion disk) is almost motionless with respect to the observer reference frame for the time intervals of orbital period by order of magnitude, while other structures change their position due to orbital motion of binary system. Periodical changes in position of accretion disk and bow shock wave, formed by interaction of inner part of circumbinary envelope and accretion disk, lead to changes in angular momentum transfer rate to the accretion disk and also results in changes of flow structure in vicinity of L3. Under considered conditions matter flux to outer parts of circumbinary envelope through vicinity of L3 is increased during half of orbital period.
Bisikalo Dmitry
Boyarchuk Alexander A.
Kaigorodov Pavel
Kuznetsov Oleg A.
Sytov Alexey
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