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Title: On the Gas Dynamic Features of the Interacting Binary System UU Cas
Authors: Kononov, D. A.
Gorda, S. Y.
Parfenov, S. Y.
Issue Date: 2019
Publisher: Institute of Physics Publishing
Citation: Kononov D. A. On the Gas Dynamic Features of the Interacting Binary System UU Cas / D. A. Kononov, S. Y. Gorda, S. Y. Parfenov. — DOI 10.3847/1538-4357/ab3afb // Astrophysical Journal. — 2019. — Vol. 883. — Iss. 2. — 186.
Abstract: We present the results of spectroscopic observations and Hα Doppler tomography of the massive close binary system UU Cas where a giant star fills its Roche lobe (donor) and transfers material through the vicinity of the L 1 point onto a massive but rather compact stellar companion (accretor). The system has been observed at the 1.2 m telescope of the Kourovka Astronomical Observatory. By analyzing the obtained spectra and computed Doppler tomogram, we suggest that at least three elements of the gas dynamic pattern in the system contribute to the Balmer Hα emission line profiles. These elements are: the stream from the L 1 point, the stellar wind from the accretor, and the diffuse disk, surrounding the accretor. In combination with the estimates of the companions' masses, our findings indicate that the system is at the late stage of the first mass transfer phase of its evolution. © 2019. The American Astronomical Society. All rights reserved.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85074135883
PURE ID: 11114133
ISSN: 0004637X
DOI: 10.3847/1538-4357/ab3afb
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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