Simultaneous WBVR observations and interpretations of the light curves of TT ARI and V603 AQL

Autor: G. V. Zhukov, D. S. Senio, Valery F. Suleimanov
Rok vydání: 1998
Předmět:
Zdroj: Astronomical & Astrophysical Transactions. 15:117-130
ISSN: 1476-3540
1055-6796
DOI: 10.1080/10556799808201757
Popis: Four-colour photometric observations of TT Ari and V603 Aql in 1994–1995 are presented. Both stars show photometric periodicities in their light curves, 3.2 h and 3.5 h respectively. But their colours sometimes also vary with spectroscopic periods for both stars equal to 3.3 h, and W–B of TT Ari varies with half the photometric period. In the TT Ari light curves quasi-periodic oscillations (QPO) are found in a wide range of periods, from 47 to 16 minutes, and they changed from night to night. The 60 minutes oscillations and their harmonics are presented on V603 Aql light curves. A new model of the oblique processing accretion disk together with reflection from a secondary or hot spot is suggested to allow for the photometric variability of these stars. The theoretical light curves of TT Ari in the framework of this model are calculated. It is proposed that QPO is connected with orbiting blobs in the disk.
Databáze: OpenAIRE
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