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Properties and nature of Be stars 31. The binary nature, light variability, physical elements, and emission-line changes of HD~81357
P. Koubský, P. Harmanec, M. Brož +10
Reliable determination of the basic physical properties of hot emission-line binaries with Roche-lobe filling secondaries is important for developing the theory of mass exchange in…
Properties and nature of Be stars 30. Reliable physical properties of a semi-detached B9.5e+G8III binary BR CMi = HD 61273 compared to those of other well studied semi-detached emission-line binaries
P. Harmanec, P. Koubský, J. A. Nemravová +13
Reliable determination of the basic physical properties of hot emission-line binaries with Roche-lobe filling secondaries is important for developing the theory of mass exchange in…
Spectral and photometric analysis of the eclipsing binary epsilon Aurigae prior to and during the 2009-2011 eclipse
Pavel Chadima, Petr Harmanec, Philip D. Bennett +12
A series of 353 red electronic spectra obtained between 1994 and 2010, and of 171 UBV photometric observations of the 2010 eclipse, were analyzed in an effort to better understand…