Physical properties of beta Lyrae A and its opaque accretion disk

0499859 - FZÚ 2019 RIV FR eng J - Journal Article
Mourard, D. - Broz, M. - Nemravová, J.A. - Harmanec, P. - Budaj, J. - Baron, F. - Monnier, J. D. - Schaefer, G. H. - Schmitt, H. - Tallon-Bosc, I. - Armstrong, J. T. - Baines, E. K. - Bonneau, D. - Božić, H. - Clausse, J. M. - Farrington, C. - Gies, D. - Juryšek, Jakub - Korčáková, D. - McAlister, H.A. - Meilland, A. - Nardetto, N. - Svoboda, P. - Šlechta, Miroslav - Wolf, M. - Zasche, P.
Physical properties of beta Lyrae A and its opaque accretion disk.
Astronomy & Astrophysics. Roč. 618, Oct (2018), s. 1-24, č. článku A112. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:68378271 ; RVO:67985815
Keywords : binaries: close * binaries: spectroscopic * binaries: eclipsing * stars: emission-line, Be * stars: individual: beta Lyr A * stars: individual: beta Lyr B
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.209, year: 2018

Mass exchange and mass loss in close binaries can significantly affect their evolution, but a complete self-consistent theory of these processes is still to be developed. Processes such as radiative shielding due to a hot-spot region, or a hydrodynamical interaction of different parts of the gas stream have been studied previously. In order to test the respective predictions, it is necessary to carry out detailed observations of binaries undergoing the largescale mass exchange, especially for those that are in the rapid transfer phase. β Lyr A is an archetype of such a system, having a long and rich observational history. Our goal for this first study is to quantitatively estimate the geometry and physical properties of the optically thick components, namely the Roche-lobe filling mass-losing star, and the accretion disk surrounding the mass-gaining star of β Lyr A.
Permanent Link: http://hdl.handle.net/11104/0292049